Unintended consequences of nature-based solutions: Social equity and flood buyouts

Nature-based solutions [NbS] can serve as effective strategies to promote the resilience of both people and ecosystems in the face of climate change. However, these solutions can exacerbate existing social inequities if they fail to adequately consider the complex social contexts in which they are implemented. To better understand the equity implications of NbS, and how to design and deliver such strategies more equitably, this study applies a conceptual framework of 4 equity pathways (distributional, procedural, recognitional, and structural equity) to a flood buyout program case study. We utilized document analysis and semi-structured interviews to conduct an equity analysis of a flood buyout program in a rural community in the Catskills region of New York. While many aspects of the flood buyout program aimed to empower local municipalities and landowners, local residents perceived a lack of decision-making power, negative long-term impacts to community well-being, and tension regarding the current and historical power differentials between these rural communities and New York City. Our results indicate individual equity pathways interact with one another in complex ways. They highlight the importance of comprehensive planning and evaluation of community impacts to better address the systems-level relationships that shape the equity implications of buyout programs.


Introduction
As climate change becomes an increasingly pressing challenge for communities across the United States, actors at multiple scales are looking towards nature-based strategies to help adapt to and mitigate climate impacts.According to the National Oceanic and Atmospheric Administration, the U.S. experienced 360 'sustained weather and climate disasters' since 1980, costing more than 2.57 trillion dollars.Further, the average number of disasters per year was 8.1 from 1980-2022, whereas from 2018-2022, the average increased to 18.0 [1].In response to these trends, the Biden-Harris administration promised an investment of over $5 billion through The Inflation Reduction Act for ecosystem restoration, which includes actions such as protecting forests from deforestation for their carbon sequestration potential and restoring coastal wetlands to buffer coastal communities from storm surge and flooding [2,3].These nature-based solutions are frequently characterized as a win-win strategy for both people and nature.The term nature-based solution [NbS] refers to "actions to protect, sustainably manage and restore natural and modified ecosystems in ways that address societal challenges effectively and adaptively, to provide both human well-being and biodiversity benefits" [4, p2].While research highlights the promising potential of NbS for climate adaptation, these strategies do not exist in an ecological vacuum.They interact with dynamic social systems, resulting in outcomes that are more nuanced and complex than the popular 'win-win' terminology indicates [5].One example of such complexity is the interaction between nature-based climate adaptation strategies and issues of social equity, which we define and discuss in the following paragraphs.
Nature-based adaptation strategies have the potential to address inequities and achieve social justice [6,7].One avenue for doing so includes strategically directing benefits and costs according to the needs of vulnerable communities and creating opportunities for authentic decision-making for historically marginalized groups [8,9].For example, a variety of research indicates that public green spaces can lead to positive physical and mental health outcomes in surrounding neighbourhoods [10,11], and is a potential tool for addressing health equity concerns [12,13].Simultaneously, these green spaces act as 'green infrastructure' in climate adaptation planning, by reducing surface heat and flooding of stormwater [14,15].By prioritizing green infrastructure in neighborhoods of color, low-income communities and communities home to elderly or young residents, adaptation efforts can address both inequities in exposure to climate hazards and public health concerns [16,17].Another avenue for achieving social justice through nature-based adaptation efforts is by prioritize the voices of communities that have been historically excluded from urban and municipal planning processes [8,18].Amorim-Maia et al., highlight adaptation planning efforts in Barcelona, Spain that prioritized the perspectives of women, low income, and minority residents in climate action planning as part of a larger efforts to center a gendered lens in their green infrastructure planning [19].
Despite the potential of adaptation strategies to achieve equitable outcomes, adaptation strategies can also exacerbate or create new inequities.In Philadelphia, for example, a climate adaptation program aimed at increasing green infrastructure in at-risk neighborhoods led to gentrification and the emigration of minority communities [20].Furthermore, without actively working to dismantle the pre-existing equity issues that create barriers for certain social groups from engaging in community planning processes, adaptation planning can further exacerbate exclusion in local decision-making as a result of conscious and unconscious cognitive racial bias and normative and institutional barriers [21].When used thoughtfully, NbS can be used to achieve equitable adaptation, but when this interaction is ignored, the unintended consequences of such strategies can exacerbate the vulnerability of marginalized groups.
Scholars are paying increasing attention to this adaptation and equity nexus, resulting in a growing body of scholarship using equity as a lens to interrogate adaptation efforts [6,22,23].However, this literature is relatively nascent and is often conceptually rather than empirically focused.Further, much of this literature discusses hazards and vulnerable groups of people broadly, leaving a need for scholarship that investigates the equity implications of adaptation efforts in contextually specific ways (i.e. a specific to climate hazard, geographic region, social group, etc.) [22,23].To help fill this gap, this study investigates the equity implications of a flood buyout program in a rural community in the Catskills of New York.We conduct an equity analysis of the program, creating a case study highlighting the complex and place-based ways in which equity can manifest and interact with a nature-based climate adaptation strategy.Further, we make recommendations for how buyout programs, and NbS broadly, can more effectively address equitable adaptation.
As scholars exploring the intersection of equity and NbS, we believe it is necessary to articulate how we conceptualize and define the concepts of equity and justice.These terms get used frequently in the human-environment interactions literature, yet their use often lacks the conceptual clarity necessary to synthesize and apply work being done in this field.We want to recognize the plurality of accurate and helpful definitions for the terms equity and justice.These vary by discipline, and often between academia and practice.In the context of this paper, we will refer to equity as the 'fairness' of a current state with respect to various social groups and justice as an action taken to address issues of equity.We use a prioritarian or needs-based criteria for equity and consider equity to be met (in the context of climate adaptation) when the needs of the most vulnerable are prioritized [24].We further outline our conceptual approach to understanding the complexity and characteristics of equity and situate it within the broader environmental justice literature in the following paragraphs.

Conceptual approaches to studying equity and justice in climate change contexts
Scholarly efforts to study the equity and justice implications of climate change are multi-disciplinary and rely on a wide body of literature [22,23].Climate justice scholarship investigates the fair and meaningful treatment of all social groups with respect to the benefits, risks and costs associated with climate change.Well known work by Thomas and Twyman often grounds conceptual understandings of equity and justice in climate change scholarship-"equity and justice, or 'fairness', in climate change can be considered in terms of processes, which largely relate to emissions issues, and outcomes, which relate to impacts, vulnerability and adaptation" [25, p116].While this broad definition facilitates a conceptual thread throughout much of the literature, a framework posed by the political theorist David Schlosberg offers clarity in how and why issues of equity and justice materialize in environmental contexts [26].
Schlosberg's multidimensional framework of environmental justice [26] separates justice into three dimensions: the distribution of costs, risks and benefits (distributional justice); the meaningful inclusion of affected groups in decision-making (procedural justice); and the prioritization of the well-being, knowledge and perspectives of affected groups (recognitional justice).Other scholars have adapted this work and added a fourth dimension-structural justice, which includes the institution and systems that shape people's ability to participate in decision-making processes [27,28].Despite these dimensions guiding much of the climate justice scholarship, multiple authors have either deconstructed these four dimensions, or proposed alternative framings for thinking about equity and justice, particularly in the context of NbS [29][30][31].These alternative framings push us to think not just about how equity may materialize in the context of climate adaptation, but what normative criteria should be used to determine whether dimension has been met.We further pull apart these distinctions in a forthcoming publication, articulating the nuanced difference between equity 'principles' and 'pathways'.For linguistic consistency and conceptual clarity, the scope of this paper is focused on Schlosberg's adapted dimensions, referring to them as 'equity pathways'.

Trends and gaps in the adaptation and equity literature
Recent efforts have sought to systematically review and synthesize scholarship investigating the equity implications of adaptation efforts and have found a clear need for empirical investigation of how issues of equity manifest in climate adaptation efforts, particularly beyond the distributional and procedural equity pathways.A systematic map by Coggins et al. found that only 4.9% of the articles included in their search empirically investigated the equity implication of climate adaptation [22].In a forthcoming scoping review, authors found that 40% of adaptation and equity papers were conceptual in nature, as opposed to empirical and data-driven (23).These reviews, in combination with reviews of specific types of adaptation strategies, point to the importance of scholarship that clearly investigates the 'on the ground' equity implications of climate adaptation.Such scholarship is needed in combination with broader conceptual work to build nuanced and evidence-based understanding of adaptation and equity interactions, particularly in the context of NbS.

Flood buyouts as nature-based solutions for adaptation
Managed retreat, involves the strategic process of moving people and infrastructure out of harm's way, most often from flooding [6,32,33].Buyouts are one tool for facilitating managed retreat.They involve the purchase of risk-prone properties, often by government agencies, and require the land to be used as open space in perpetuity [34].Buyouts have been historically used in communities across the U.S. to address the issues of both riverine and coastal flooding [34,35].Buyouts can function as a NbS tool due to their potential to restore and protect the ecological integrity of floodplains [36,37].
Research reviewing the complexities of buyout programs identify several potential equity implications.One of most significant equity concerns is the decision-making process involved in deciding whether buyouts are an appropriate risk reduction strategy for a particular community.An analysis of eight U.S. buyout programs highlighted a lack of transparent decisionmaking and reliance on financial cost-benefit analysis that may "promote disproportionate retreat in low-income or minority communities" ( [38], p1), furthering gentrification.Another equity concern is the significant resources required to access and facilitate buyout programs.Multiple studies point to limited access to buyout funding mechanisms for communities with low financial resources or municipal capacity [35,39].Additionally, buyouts, as a broad policy tool, largely ignore the experience and needs of renters [40].A 2022 review discusses these concerns, ultimately arguing that buyouts simultaneously have the potential to build community climate resilience and negatively impact individual households [41].To further understand such potential equity implications, these scholars underscore the need for multi-scalar, multi-dimensional and place-based analyses of buyout programs.
The aim of this study is to use a clear conceptual framework to analyze the equity implications of a buyout program.This work provides a case study analysis of how equity and adaptation interactions manifest in a single municipality while explicitly recognizing the multi-scalar nature of this regional buyout program involving multiple communities.The research question that guides this work is: How does a regional buyout program, designed as a NbS to reduce flood risk and improve water quality, interact with multiple equity pathways (distributional, procedural, recognitional, structural) to produce a community's local experience with the program?

Case study community
Community selection.This case study research was conducted using a transdisciplinary approach [see Steger et al., 2021 for further discussion of transdisciplinary environmental research].As such, the community at the center of this research was selected based on several criteria.First, as The Nature Conservancy in New York is both the funder and practitioner partner in this research, the selected community has a pre-existing relationship with The Nature Conservancy in New York's climate adaptation team.Such relationships are critical to conducting effective community-based research that adds to both theory and practice [42].Second, the selected community is actively engaged in a flooding adaptation strategy.Third, the community is home to diverse social groups with increased potential for pre-existing inequities.For this criterion, we relied on indicators from census data such as the diversity index, percent of households below the poverty line, Gini index, median household income, median age, median rent costs, percent of population with documented disability, and percent of people with English as a first language.Based on these criteria, we narrowed down potential communities to a handful of locations, and selected the final community based on local leadership interest and capacity to participate in the research.Throughout this article, we refrain from naming the specific community or providing identifying information to protect the anonymity of participants.
Community and watershed background.The case study community is located in the Catskills region of New York State and is home to under 5,000 residents with a density of less than 1,000 people per square mile [43] This New York City 'bedroom community' was significantly impacted by the housing market trends associated with the COVID-19 pandemic, as the local market experienced a rapid increase in short term accommodations and second home purchases by New York City residents seeking refuge from pandemic.Housing costs increased by 27 percent between 2020 and 2022, with a vacancy rate of 1.81% in 2020, down from 3.51% in 2019 [44] and compared to a recommended healthy 5-8% by housing experts [45].In addition to housing challenges, issues of transportation access, food security and healthcare access also significantly impact the lives of the community's most vulnerable residents-a pattern of challenges familiar to many rural communities across the U.S. [46,47].
The case study community is located within the New York City Watershed-the watershed supplying drinking water for New York City Residents.New York City is the largest single landowner and property taxpayer in the community and as a result, holds significant power over land use and resources in the community.The New York City Watershed can be described as: ". . . the largest unfiltered water supply in the United States, serving 9 million New Yorkers with about 1. 3

billion gallons of clean drinking water each day. The New York City Watershed spans nearly 2000 square miles, extends 125 miles north and west of New York City, and includes 19 reservoirs. It is also home to nearly 1 million inhabitants" [48].
To protect water quality and maintain their ability to use unfiltered water [see Pires, 2004 for discussion about New York's Filtration Avoidance Determinations [FAD] from the Environmental Protection Agency], New York City spends significant resources to avoid point source pollution, such as flood water runoff, within the watershed [i.e., to avoid pollution in NYC drinking water].One strategy is their Land Acquisition Program, which is mandated to protect both water quality and the vitality of local communities in the watershed.NYC officials estimate that without the FAD, building the necessary water treatment facilities would cost upwards of 1 billion dollars USD, with annual costs of over 100 million dollars to provide the drinking water for 8.5 million consumers [49].
NYC's Department of Environmental Protection [DEP] has a controversial history in the region due to its rapid land acquisition and subsequent control over land use in the region.Since 1997, the percentage of total city and state protected land within the west-of-Hudson watersheds has "increased by at least 18%, with over 154,000 acres acquired through fees or easements, at a cost of almost $500 million" [50, p 201].Additionally, the initial creation of multiple reservoirs in the watershed occurred through eminent domain in the early 1900's [51].Eminent domain is a legal tool that allows the government to take and purchase private property for public use and has historically been used in the U.S. to acquire land for public infrastructure projects [52].Multiple families in this case study community have ancestors that were involuntarily removed from their farms and communities to build the reservoirs.
Flooding and buyouts in the NYC watershed.Many rural communities in the Catskills are experiencing the effects of climate change, particularly from increased flooding.As major storms and subsequent floods in the last two decades (such as Hurricane Irene (2011) and Hurricane Sandy (2012)) have caused significant damage to infrastructure and property, national, state, and local efforts have focused on improving the flood resilience of local communities.One of the programs that emerged from these efforts is the New York City Funded Flood Buyout Program (NYCFFBO), a subprogram of the DEP's Land Acquisition Program.The purpose of this regional program is to support voluntary buyouts of residential and commercial properties in the 100-year floodplain located in the New York City Watershed.The program seeks to get people and property out of harm's way and simultaneously reduce the risk of point source pollution created from flood damaged properties [53].
To qualify for the voluntary program, the property must be at high risk for flood damage according to local flood analyses and receive municipal government approval to participate.Appraisals are conducted for pre-disaster, fair-market value and used to determine the selling price offered to the property owner.After the property is sold, it is transferred to local government ownership and a reuse plan is established, preventing future development but allowing for conservation and recreation activities.The program attempts to address issues of relocation by making some funds available to relocate housing and businesses within the region.
The history of eminent domain, the multi-scalar nature of the program, the dual intended outcomes of the program, and the pre-existing equity concerns that challenge rural communities make this buyout program a salient case study for an equity analysis of NbS climate adaptation effort.This case study is just one example of a buyout program.For a full review of the mechanics of how buyout programs work, see Greer & Brokopp Binder [54].

Data collection
To investigate the equity implications of this regional buyout program in the case study community, we used a combination of document analysis and semi-structured interviews.Document analysis.We first conducted a document analysis of all online publicly available documents and media articles covering the NYCFFBO program and the case study communities' engagement with the program.Our process was guided by Grant's guidelines for social research with documents [55] and Hancock and Alogzzine's guidelines for case study research [56].Table 1 lists inclusion and exclusion criteria for our document analysis.The document search was conducted in May of 2022 and utilized broad search engines as well as specific searches on municipal websites, DEP's website and websites of related organizations and institutions.In total 68 documents and 20 media articles were included in our document analysis, with over 4,000 pages of text.See S1 Text for document search terms and details.
Semi-structured interviews.In addition, we conducted semi-structured interviews with three groups of community members.The first group included community members who owned properties that were eligible for a buyout and had either participated in the program or been approached about the program.These included both owners of residential and commercial properties.Every property member who qualified for a buyout in the community was invited to participate in an interview.The second participant group included community members with a decision-making or facilitation role in the buyout program.These included elected municipal leaders, town board members and individuals working for the institutions that had a management role in the buyout program.The third participant group included community members living near bought out properties but did not own flood-prone properties that qualified for a buyout.A few of the participants fell into multiple categories.In total, 17 members of the community were interviewed, relatively evenly across the three participant groups.We relied on a combination of snowball and strategic sampling for participant recruitment.These interviews lasted between 1 to 3 hours in length and occurred via video call, phone call, or in-person meeting, based on participant preference and needs.Interviews were audio recorded and then transcribed using Otter AI software [2022], and then manually checked for accuracy.Interview data was collected between November 2022 to February 2023.See S2 Text for semi-structured interview guides.
Ethics statement.This research was approved by the institutional review boards at the University of Colorado Boulder (21-0497) and The Nature Conservancy.Written informed consent was obtained from all interview participants.

Data analysis
Interview transcripts and documents were coded using a thematic analysis process.A team of three researchers thematically and deductively coded the data, using Braun and Clark's process to guide the analysis [57].The coding team collaboratively coded two initial interviews to calibrate coding using NVivo.Each interview script was then independently coded by two researchers.Coding was compared and any discrepancies were addressed by the lead researcher.Research memos were collaboratively written for each theme as coding occurred,

Distributional equity: How are the cost and benefits of the program distributed across different actor groups?
Conditions supporting distributional equity.When discussing impacts of the buyout program, interviewees and data from the document analysis described both beneficial and harmful impacts (see Fig 2).With respect to beneficial impacts, interviewees characterized the program as an effective strategy for reducing risk to flooding and in some cases, alleviating the financial distress experienced by property owners (either from flood damage or flood insurance costs).One participant reflected on the impacts of the flooding prior to the establishment of the buyout program.
"The flood buyout didn't come in time for those people and they lost their place and I still can see them sitting there crying with their head in their hands. . .they lost their family house and business".Some participants used these examples to describe the buyout as the only option to get people who were financially struggling with the flood damage, out of the floodplain.". . .I just think that was it [the only option].That was the savior.It was a lifeline that was thrown to those people, because there was nothing else.What else could there be?I mean, what else had the money, finances behind it and the legal ability to do it?No, that was the. . .that was the only option for them.Either that or drown.Yeah, that was it. ..sink or swim" Conditions reducing distributional equity.While participants positively reflected on the program's ability to reduce flood risk in watershed communities, they also discussed more indirect impacts that they felt disproportionately negatively impacted their watershed community.These negative impacts fell into three primary categories: i) impacts to essential services, ii) impacts to housing affordability, and iii) impacts to community cohesion.While related, these three categories represent distinct ways that the buyout program has manifested at the community scale.Participants also expressed that the buyout has had uneven impacts across individual residents of the community, based on one's tenure in the community and other factors such as age and income.
Impacts to essential services were primarily discussed as threats to healthcare services, emergency response services and food security.One of the properties that had received a buyout was a local healthcare clinic that had been significantly damaged by Hurricane Irene.Although there were significant efforts to relocate the clinic in the community but outside of the floodplain, regional scale development pressures and healthcare industry trends that threaten rural healthcare access prevented the relocation of the facility.This left residents both within and outside of the municipality with extremely limited access to medical services.One interview participant noted: "they're (larger medical companies) pushing out the most essential service to hundreds of square miles here.I mean, it's really, it's a huge area with no doctor.It's really big.Because we had people from X County, from X County, from X, we had people from far away coming here".
An emergency response station was also approved for the buyout but has experienced extreme difficulty in securing the funds to rebuild updated infrastructure on a nearby property outside of the floodplain.Until relocated, this leaves critical emergency response services at extremely high risk of flooding, hindering capacity to respond to emergencies in a storm or flood event.
The local grocery store also meets the qualifying criteria for the buyout, and while there are seemingly no current plans for the buyout of this property, it highlights the complexity of buyouts in communities with concentrated essential services in the floodplain.Interviewees acknowledged that the loss of the grocery store would turn the community into a food desert, expressing that this loss would be the "nail in the coffin" for the community.
When asked about the impacts of the buyout program, participants also indirectly discussed issues of housing affordability.As a 'bedroom community' of NYC struggling with a surge in second home purchases, short term rentals and a post-Covid housing market crisis, community leaders described the difficulty of supporting buyouts while simultaneously addressing issues of housing affordability.Data from the document analysis indicates that completed and slotted properties for buyouts have or will remove a handful of housing units [with the exact number dependent on ongoing negotiations] in the community.While participants noted the difficulty in quantifying the impact of these losses on the housing market, they highlighted the need for the buyout program to have a more explicit focus on potential impacts to housing.Due to the steep topography of the area and the significant amount of land dedicated to conservation for the purpose of water quality, participants described any buyout of a residential property as a multiplier of local challenges with housing affordability and availability.When referencing the plans and analyses required for a community to be eligible for buyouts, one interviewee referenced a lack of focus on housing: "They were talking about properties and moving buildings, and reuse of land.I had to make them go back, and just change the language to address tenants and people.So there's a natural inclination for people that do some of this analysis, especially engineering firms, to just look at it from a very technical moving pieces around kind of a thing.But again. . .what gets lost?The community.The people, you know?I couldn't believe it.I'm like, you know, you didn't include any housing!"Furthermore, participants articulated the buyout program negatively impacted community cohesion and culture in the study community.Several interview participants expressed concern about what would be left of the community in the future after the buyouts.One individual wondered, "what does it do to a community when there's nothing left?" and described their sadness at living through the "decay" of their community.These concerned residents suggested that the buyout program does not do enough to acknowledge these losses and "make the community whole" again after buying out properties.They urged for a more holistic approach to community needs and an acknowledgement that the program isn't just about property values and money, but that it's also about the social fabric of the community.One of the residents whose family had lived in the community for multiple generations and had relocated out of the area after a buyout reflected that they have not been able to regain the sense of community in their new location.
It is important to note the intersecting impacts of losing essential services and losing community cohesion.This is particularly salient when considering a community the size of this study community, where the loss of a single business can have an outsized impact, compared to larger or more densely populated communities.Several participants described the local grocery store not only as an essential service, but also as a gathering place that contributes to the town's sense of community.One individual mentioned that seeing neighbors at local businesses "kept everybody going" during the COVID-19 pandemic.Many of the commercial properties involved in the buyout program were described through this lens by participants, which highlights both the tangible economic benefit they bring to the community and the intangible benefits to community culture and cohesion.
Interviewees also highlighted that the program impacts in the community do not affect all residents equally.One interviewee noted that those residents located on the western side of town are more vulnerable to the potential loss of services, as they are significantly farther from other services.Residents without access to reliable transportation, such as low-income households or elderly residents are also especially vulnerable to the loss of businesses and services.Another individual described the loss of community culture, and transition of the community from a cohesive village to a "highway with plazas," as particularly detrimental to children and the school community, as a regional school sits at the center of many of the buyouts.Further, the buyouts were described as a "line in the sand" between newer and longer-term residents.One participant noted, "I think it's harder to let go of something that's been in your family for generations."In general, longer-term residents were described as having deeper place attachment and a more difficult time adjusting to the changes in the community.

Procedural equity: Whose perspectives and input are included in program processes and decision-making?
Conditions supporting procedural equity.Data from the document analysis and participant interviews create a picture of a program that is both seemingly designed around prioritizing local community decision-making and also inadequately takes into consideration the complexities of community engagement and power differentials.In terms of effective program design, notable components include municipalities having the final say on both their participation as a community and individual property agreements.Additionally, outreach to eligible property owners about the potential of a buyout is conducted by municipal representatives, and the communities are encouraged to take ownership of the property once structures have been removed.Further, the program had recently discontinued using a monetary cost-benefits analysis as an eligibility criterion for properties, in an effort to acknowledge the difficulty in capturing the non-monetized benefits and costs of buyouts.All of these process components of the program were mentioned by participants as critical for supporting community level decision-making and authentic engagement in the program.
Conditions reducing procedural equity.However, interviewees and policy documents also indicated that the program still had some significant challenges with respect to centering local community decision-making.One interviewee stated that opportunities to provide input felt superficial and intentionally limited, as though the decision-making process already had a "predetermined outcome."They specifically cited limited community meeting agendas, which hindered constructive debate, and majority opinions ignoring dissenting voices at meetings.Some participants describe this as creating an environment which provided limited opportunity for individual voices to provide feedback and feel heard.
Additionally, participants reflected on how much decision-making power individual property owners actually had, given the lack of other affordable adaptation options available for a property owner who rejects a buyout offer.One individual noted that, when a homeowner rejects a buyout offer, there "doesn't appear to be any good options" for that individual.There was a sense that residents who participate in the buyouts are lucky to receive the "opportunity" to get paid market value for their properties.Other interviewees noted that, after Hurricane Irene, an initial FEMA buyout process [prior to the establishment of the NYCFFBO program] left participants exhausted and had negative emotional impacts equal to those of the hurricane itself.Overall, residents agreed that the buyout program was a better option for residents than a FEMA buyout or than doing nothing, but that it wasn't 'good' option for residents.
Participants also highlighted a need for a more holistic approach to buyout program planning and decision-making.The buyout program was implemented as a response to immediate needs, which inevitably led to a short-term planning approach.One individual noted that it would have been beneficial to "look at the program as a whole" further in advance, and develop more robust decision-making structures, rules and definitions.Another interviewee expressed that there is a need for the buyout program to be more aligned with community development planning and compared early property buyouts as equivalent to "running with scissors".Specifically, participants cited a need for science, including climate change projections, and local knowledge to be more incorporated into buyout planning efforts.
While participants struggled with the fast speed of the buyout planning process, they also lamented the lengthy buyout approval process.The continued risk of living in areas highly susceptible to flooding, as well as the need for the money the buyout will provide, prompted many participants to believe that the current process is too slow.One individual noted, "Money is at the top of [people's] minds. ..if it can't happen in the timeframe they need, and they can't be given a fair price, they might try to sell it. .."One reason cited for the length of the process is a gap in needed technical assistance.Since the program requires many organizational steps, there are currently limited resources and individuals with the capacity to support property owners through the many steps of the process.However, participants strongly underscored the importance of the local people currently in facilitation roles and expressed gratitude to multiple buyout program managers with long-standing connections and relationships in the area.

Recognitional equity-What outcomes does the program really prioritize? Whose experience does it prioritize?
Recognition of watershed community needs versus New York City needs.The tension between buyout program priorities was apparent in the analyses of both public documents and interview data.The most obvious tension is between the dual outcomes of the larger Land Acquisition Program to both improve water quality for the city of New York and safeguard the vitality and well-being of the rural communities in the watershed.While the program's objective of reducing flood risk manifests by getting people and structures out of harm's way, multiple interviewees described water quality as the ultimate priority of the program above any impact on rural community well-being.In describing this fundamental challenge of the program, one participant stated: "We need to try really hard to represent the people in the conversations happening at the higher level. . .I don't know that everybody's thinking about the actual people in this whole scenario.They're seeing buildings and they are seeing water quality and they're seeing things in their way".Such a perspective is supported by a lack of publicly available program evaluation metrics used to assess community impact.However, program facilitators indicated that the program is working towards including more community impact metrics as a recent assessment by the National Academies of Sciences, Engineering and Medicine (50) highlighted the need for such indicators.Additionally, this shift is seemingly supported by the recently dropped cost-benefit analysis eligibility criterion.Participants described this change as an important recognition of the hard-to-monetize costs and benefits associated with community resilience and well-being.
Recognition of differing needs within the community and across time.Tensions between quality of drinking water for NYC and watershed community's well-being is not the only recognitional equity tension at play.Additionally, participants highlighted a tension between the well-being of a single property owner and the well-being of the community.When describing the complexity of weighing multiple needs and scales, one interviewee stressed the difficulty of deciding whether to permit a buyout if it did not serve the interests of the whole community.While denying the buyout might prioritize the needs of the community, such a decision would financially harm individual property owners struggling with the costs of living or owning a business in the floodplain: "When you start to see and weigh the benefits of community assets versus personal loss and personal tragedy, that becomes a very difficult decision and a compelling decision. . .I mean, are you going to say to a property owner that has had a business in your town for 5,10, 20 years, that you're not going to let them leave and they're going to have to stay there and suffer and they won't be able to sell their property, they are going to have to continue to pay flooding insurance they can't afford?There's been an eventual inevitable into that story.And it's. . .it's devastating" Structural equity: What pre-existing equity issues influence the processes and outcomes of the program?History of eminent domain.Multiple interviewees brought up the history of eminent domain in the watershed and the injustices created by forced relocation of communities in the early 1900's to build the reservoirs that make up the New York City drinking water system.Participants discussed how this injustice shapes the interactions between the local community and DEP: "What my ancestors and the communities went through. . .And then to have it happening in real time.It was just really weird. . . it felt like it was happening again".Another interviewee explained the current tension went beyond that of between rural communities and DEP but between members within the same community: "I do think in some ways that the history of the reservoir has exacerbated the tension between people who are from here and people who come here, because they think that there are really good reasons for that tension.People were displaced when that reservoir was built, and the reason that reservoir was built, everyone knows, it's because New York City folks needed water. .."However, participants also discussed the lack of recognition of this history.Our document analysis supports this perspective, as none of the publicly available documents explaining the buyout program explicitly recognizing the historical use of eminent domain and the resulting tensions.

Present day resource disparities between rural municipality and NYC
Simultaneously, interviewees discussed the more recent history of litigation between NYC and watershed communities, specifically referencing the significant power differentials-both in terms of their financial resources available and the role NYC plays as a significant landowner in this case study community.Interviews identified NYC's seemingly endless ability to engage in litigation and local communities' limited ability to hold the DEP accountable for the buyout program: "You know, the city is king here, whether we like it or not, and we, in my town have reaped the benefits of that, which is that our taxes are lower and we have the incredible reservoir in our area.The base side, is that they've take a lot of land that didn't belong to them and now people's homes are flooded, but you know, that happened 100 years ago. . .and [Community name] benefited from the city, in many ways. . .someday we would have to pay the piper so the buyouts seemed pretty much in tune with that."Pre-existing challenges facing rural communities.In addition to historical and presentday issues surrounding land ownership, pre-existing equity concerns specific to rural communities have the potential to significantly influence the buyout program.As mentioned above, these challenges include equitable access to essential services, and potential impacts on available housing.The pattern in how/if these properties have taken a buyout, and whether they will be relocated, is mixed and property-specific.However, the potential impact of such buyouts is deeply influenced by insecurities around food and healthcare that plague rural communities across the country.One participant explained: "When you look at the income in the town, if you have a large percentage of part timers, those people may not use your medical facilities here.The convenience to have the market probably doesn't affect them.So I think people with more wealth have more options.I think that if you're the person living in what used to be a section eight housing that sold and is now turning into $2,000 apartments. ..There's people with limited abilities and means to travel far for basic human needs, food prices, the cost of fuel, the medical. . .all of those things are changed in the buyout of properties with critical services.So yes, I would say from an economic level, that (the buyout program) hurts the people on the bottom of the economic ladder more, not because it's cheaper, because it's not.But because of the proximity, and the convenience and the ability to go farther".
Participants explained that these pre-existing issues make each property buyout that much more contentious.

Discussion
These results paint a picture of a community's complex experience with a NbS to climate adaptation.While the benefits of the buyout program far outweigh the costs for NYC, a comparison of costs versus benefits for the study community is less clear (distributional equity).While the program removes people from harm's way and out from underneath the financial strain of living in a floodplain, more indirect costs such as loss of essential services, housing units and community cohesion complicate any cost-benefit analysis.With respect to program decisionmaking (procedural equity), some process components center local decision-making power, and other process components limit the agency of community members and individual property owners.To complicate matters, the program must contend with competing goals and is seemingly designed to prioritize water quality over community well-being, short term over long term outcomes, and individual property rights over community wide resilience (recognitional equity).All of this is occurring with an undercurrent of historical use of eminent domain, significant power differentials between NYC and rural local governments, and pervasive economic and social challenges already facing rural communities in the region (structural equity).
These findings highlight the multitude of ways equity and adaptation can interact to produce how a community experiences a buyout program.The manifestations of this interaction provide applied examples that can be leveraged to reach equitable adaptation outcomes rather than exacerbate inequities.Notably, we think this data underscores a combination of theoretical and applied implications.Specifically the results highlight i) the diversity of ways in which individual equity pathways can interact with one another and the implications of such interactions, ii) the power of procedural equity and its relationship with individual and community level agency, and iii) the need for future research that investigates the efficacy of using equity frameworks to proactively design equitable adaptation.

Interactions between equity pathways
A significant amount of research applies, or critiques adapted versions of Schlosberg's environmental justice framework [22,[27][28][29].However, much of this work focuses on distributional and procedural equity pathways.The literature that does expand to structural and recognitional equity pathways often discusses them in isolation from one another [58].Notably, our results explicitly highlight the interactions between equity pathways and provide concrete examples that prove powerful in supporting a clearer conceptual understanding of such interactions in a climate adaptation context.
For example, the data suggest a clear link between structural and distributional equity.Systemic rural inequities such as access to housing, healthcare, and food security (structural) interact with the buyout program to make the loss of properties that house these essential services incredibly salient, particularly with community members already struggling with these issues (distributional).In this example, the structural inequities make the buyout program a 'threat multiplier', exacerbating the distributional impacts.While the loss of a handful of residential properties or a healthcare clinic might not be a significant impact on its own, when it occurs in a community already struggling with essential service access, these buyout impacts are amplified.This is especially the case for low-income community members who already experience these challenges more significantly.
The data further highlight a relationship between structural and procedural equity.The use of eminent domain in the early 1900's to construct one of the reservoirs for the New York City drinking watershed resulted in the removal of the ancestors of present-day community members from their land and livelihoods.Participants discussed the forceful removal and lack of compensation given to property owners as the building blocks for the mistrust community residents have with NYC DEP.All three groups of participants talked about this mistrust as a barrier dissuading community members from engaging in planning and community engagement opportunities around the buyouts.This structural and historical inequity means that even if opportunities for meaningful engagement are provided (procedural), they will struggle to achieve authentic engagement, because the often unacknowledged and contentious history between DEP and the community dissuade community members from engaging.
Data from both the interviews and document analysis also point to the influence that the recognitional equity pathway has on both distributional and procedural pathways.As mentioned in the results section, recognitional inequities result from a tension in program priorities: NYC water quality versus community well-being, private property owners versus the broader community and short term versus long term outcomes.Arguably, the program strongly prioritizes one side of each of these tensions: water quality, private property, and short-term outcomes.This is unsurprising, as the program is nested within a larger societal system that also tends to prioritize these more tangible and measurable priorities.However, these realities mean that program impacts disproportionately benefit the residents of New York City and property owners within the community (distributional).They also shape the effectiveness of efforts to authentically prioritize local decision-making power (procedural).Attempts to engage community members in planning and feedback have muted impact when residents feel like the program is stacked against their interests.Fig 3 illustrates our conceptual understanding of these connections in addition to the procedural-distributional interactions discussed in previous literature.
Equity pathway interactions can help us understand why and how adaptation strategies can result in equitable versus inequitable outcomes.Such interactions have the potential to strengthen the usefulness of Schlosberg's framework [26] (and adapted versions of the framework [27,28]) as they address critiques that such a dimensional approach is oversimplistic.More specifically, acknowledging the interactions between equity pathways is a critical step towards moving conversations about equity and adaptation from vague and conceptual categories to more concrete and nuanced understandings of how frontline communities experience climate adaptation.This is particularly salient in the context of nature-based adaptations, as the complexities of social and economic outcomes are often overlooked by the win-win narrative of NbS [29,58].Interaction-based understandings of equity pathways can help naturebased scholars and practitioners identify leverage points in managed retreat planning processes, by helping to predict the cascading effects of multiple interacting equity pathways.

Salience of procedural equity-a pathway to agency and adaptive capacity?
Interviewees from all three participant groups discussed the importance of procedural equity in multiple ways: 1) in the lengths the program design goes to prioritize local decision-making power, 2) in the lack of comprehensive planning and 3) the lengthy timing of the program.One of the most striking references to procedural equity was the discussion of meaningful choices or agency.Scholarship in the climate adaptation spaces frequently talks about agency, or the ability to make choices and ensure those choices have meaningful impact on one's life [59] as an important component of adaptive capacity [60].The buyout program is voluntary, and the local officials make the final say on eligible properties-this sounds like decision-making power.But when a resident or community's options include 'bad option 1' or 'bad option 2,' it begs the question of whether this reflects real agency and if the decision feels like an actual choice.And, if not, is an artificial choice equitable?While the long-term implications of buyouts on property owners and community well-being is a critical gap in the literature, the results of this study encourage us to think about the power that authentic procedural equity might play in supporting these long-term outcomes.Further, the concept of agency calls us to move beyond a superficial understanding of procedural equity.We cannot just ask, 'who's included in decision-making processes?' but also, 'do these processes include meaningful choices?'Such a holistic notion of agency provides a useful indicator for equitable adaptation.

Recommendations for equitable buyouts and nature-based climate adaptation
These insights point to meaningful and actionable steps that adaptation practitioners and municipal leaders can take to make their buyout programs more equitable, and NbS to adaptation more broadly.First, investing more resources into comprehensive planning would better address the complex, systems-level relationships that buyout programs have with the equity pathways, as well the larger social-ecological system in which they are embedded.These planning efforts should consider not only how the buyout program influences flood resilience, but also how it influences broader resilience and equity challenges related to accessing essential services.For example, comprehensive planning, led by empowered and trusted community members, might enable a community to identify which structural inequities (e.g., rural challenges with healthcare) would be exacerbated by the impacts of a buyout program for certain residents (e.g., loss of a clinic on older residents or residents with transportation challenges).Increased financial and human resources dedicated to planning would allow for the time and information needed to consider how the buyout program could proactively address these distributional impacts.Such a planning process would allow for the time and information needed to proactively think through complex equity implications, consider the interactions between different equity pathways and avoid unintended consequences.
Second, the findings underscore the importance of local people who are trusted and have the technical expertise on the mechanics of nature-based programs and policy tools.This is an important strength of the buyout program under study, and these individuals serve as important information brokers and critical linkages to acknowledging and addressing structural inequities (such as the history of eminent domain) and providing local knowledge to program facilitators.By investing in relationship building and program facilitators who are trusted in the community, programs can achieve equity via multiple pathways.
Our third recommendation is to include the impacts to community resilience to economic and social shocks more broadly within the 'cost' of NbS for climate adaptation.Secondary impacts of the program on health outcomes, sense of community, food security or housing affordability are natural results of the complex system buyouts occur within.But it is only by tracking these impacts, and explicitly considering them a 'cost of the program' rather than an externality, that we can begin to leverage the resources needed to mitigate them and reduce potential inequities.
Relatedly, more holistic program evaluation would help better prioritize equitable outcomes.Such efforts should seek to measure impacts to flood resilience, overall resilience and process engagement.Distributional and procedural equity provide framing for these indicators, while structural and recognitional pathways provide an understanding of why and how these indicators occur.If equity is both a means and an end for adaptation, these data-driven recommendations point to potential leverage points for designing buyout programs.

Limitations and future directions
While we believe our research yields powerful lessons for both the theory and practice of equitable use of NbS for climate adaptation, we do not want to overstate the generalizability of our case study.The place-based nature of this research is both one of its biggest strengths and limitations.It has allowed us to collect data that richly describe a rural community's experience with a buyout program and analyze how equity shapes that experience.The patterns in this data have the potential to function as 'signposts' for future equity analyses and give concrete examples of how equity pathways manifest in applied adaptation contexts.However, this also means that the applicability of our findings to other buyouts programs, other communities and broader adaptation work should be critically considered.Additionally, there is a potential for sampling bias in our interviewing process.Significant resources were spent to ensure we reached out to every single participant of the buyout program in our study community, as well as neighbouring community members.Further, our research collaborators had existing relationships within the community, and we relied on local leadership to ensure our work was relevant and took into consideration local context.However, the primary researcher was an 'outsider' to the community, and the time availability of participants and their relationships with our collaborators may have influenced whether people were willing to engage with the study.
Despite these limitations, the findings and associated implications of this work point towards some important next steps for the research community.First, this work begins to fill a gap in the literature that investigates the equity implications of climate adaptation in rich detail and at a local scale, specifically in the context of a rural community where economic inequity is a salient characteristic.While macro-level studies looking at broader patterns in buyouts have focused on racial equity, more local-level studies are needed to thoroughly understand the unique experiences of communities of color and how equity pathways materialize.Secondly, this study uses the equity pathways as a conceptual tool for understanding the impacts of a buyout program after the buyouts have occurred.This conceptual tool may also be useful in helping adaptation practitioners proactively think through the equity implications of their adaptation work, and as a result, design more equitable adaptation programs.However, minimal work has been conducted to confirm this hypothesis, and research that robustly evaluates the use of equity analysis tools and associated training would make an important contribution to equitable adaptation.

Conclusion
Nature-based solutions can serve as effective strategies to promote the resilience of both people and ecosystems in the face of climate change.However, it is important to incorporate social equity considerations into the design, implementation, and evaluation of these strategies to avoid maladaptation or exacerbating the marginalization of vulnerable groups.While much of the scholarship investigating social equity and climate change adaptation is conceptual and abstract in nature, this research provides an opportunity to consider the 'on the ground' implications of a flood buyout program on social equity.Further, this work applies an equity analysis using a four pathways framework grounded in the justice and equity literature.Many aspects of the flood buyout program aimed to empower local municipalities and landowners.However, an analysis of interview data and public documents also identified a lack of decisionmaking power at the individual and community levels, negative long-term impacts to community well-being, and significant power differentials between rural municipalities and the government of New York City.Our findings point to the nuanced and varied ways in which different equity pathways interact to produce a community's experience with adaptation.Our recommendations seek to provide guidance for improving the equity of the buyout program we examined, but also identify leverage points that can be addressed to increase the equity of NbS to climate adaptation more broadly.
Fig 1 outlines our collective understanding of these pathways as they guide our study design and analysis (see Fig 1).

Fig 3 .
Fig 3. Conceptual interactions between equity pathways.https://doi.org/10.1371/journal.pclm.0000328.g003 find the documents.(DOCX) S2 Text.Interview guides.The following scripts were used to guide the interviews with study participants.(DOCX) S1 Table.Thematic analysis code book.This codebook was used for deductively analyze both interview transcripts and publicly available documents.(DOCX)