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The spatial exposure of the Chinese infrastructure system to flooding and drought hazards

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Abstract

Recent rapid urbanisation means that China has invested in an enormous amount of infrastructure, much of which is vulnerable to natural hazards. This paper investigates from a spatial perspective how the Chinese infrastructure system is exposed to flooding and drought hazards. Infrastructure exposure across three different sectors—energy, transport, and waste—is considered. With a database of 10,561 nodes and 2863 edges that make up the three infrastructure networks, we develop a methodology assigning the number of users to individual infrastructure assets and conduct hotspot analysis by applying the Kernel density estimator. We find that infrastructure assets in Anhui, Beijing, Guangdong, Hebei, Henan, Jiangsu, Liaoning, Shandong, Shanghai, Tianjin, Zhejiang—and their 66 cities—are exceptionally exposed to flooding, which affects sub-sectors including rail, aviation, shipping, electricity, and wastewater. The average number of infrastructure users who could be disrupted by the impacts of flooding on these sectors stands at 103 million. The most exposed sub-sectors are electricity and wastewater (20 and 14 % of the total, respectively). For drought hazard, we restrict our work to the electricity sub-sector, which is potentially exposed to water shortages at hydroelectric power plants and cooling water shortage at thermoelectric power plants, where the number of highly exposed users is 6 million. Spatially, we demonstrate that the southern border of Inner Mongolia, Shandong, Shanxi, Hebei, north Henan, Beijing, Tianjin, south-west of Jiangsu—and their 99 cities—are especially exposed. While further work is required to understand infrastructure’s sensitivity to hazard loading, the results already provide evidence to inform strategic infrastructure planning decisions.

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Notes

  1. Note that Hunan province has a percentage at 101 % and Jilin province at 109 %, which may be a reflection of data inaccuracy of the Enipedia database. In this case, Enipedia has collected power plant data, which exceed the official database’s output. Data on Taiwan, Hongkong, and Macao do not exist hence exhibit 0 %.

  2. The OpenStreetMap data set has rail tracks and station data in separate files. This means that some stations are off the track where others have no tracks nearby. Since our “rail routes” data are stored in station-to-station format, we resort to constructing our own tracks and verify these with the OpenStreetMap tracks.

  3. For detailed drought methodology, please refer to the Atlas of Natural Disaster Risk of China (Shi 2011).

  4. Exceptionally exposed is defined as provinces that are located in areas where their infrastructure hotspot values are either 7 or 8.

  5. Personal communication with the Chinese Ministry of Water Resources indicated that a national-scale flooding risk map should be available by 2017.

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Acknowledgments

This work was supported by the Asian Studies Centre, University of Oxford. JWH and WHL acknowledge the Oxford Martin School for the financial support of this study through the grant OMPORS. We thank Simon Abele at the Environmental Change Institute (ECI), University of Oxford, for his contribution in assembling the OpenStreetMap network data set. We are also grateful to Dr. Raghav Pant for coding the input from the flood results, Scott Thacker at the ECI, and Valerie Bevan for their comments during the development of the paper.

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Correspondence to Xi Hu.

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Appendices

Appendix 1

See Table 7.

Table 7 Route type and carrying capacity

Appendix 2

List of cities exposed to high flooding risks for all infrastructure sub-sectors (rail, aviation, shipping, electricity, and wastewater)

City

Province

Chaohu

Anhui

Chuzhou

Anhui

Hefei

Anhui

Ma’anshan

Anhui

Suzhou

Anhui

Wuhu

Anhui

Xuancheng

Anhui

Beijing

Beijing

Dongguan

Guangdong

Foshan

Guangdong

Guangzhou

Guangdong

Huizhou

Guangdong

Jiangmen

Guangdong

Qingyuan

Guangdong

Zhaoqing

Guangdong

Zhongshan

Guangdong

Zhuhai

Guangdong

Baoding

Hebei

Cangzhou

Hebei

Handan

Hebei

Hengshui

Hebei

Langfang

Hebei

Shijiazhuang

Hebei

Tangshan

Hebei

Xingtai

Hebei

Anyang

Henan

Hebi

Henan

Jiaozuo

Henan

Kaifeng

Henan

Luohe

Henan

Puyang

Henan

Xinxiang

Henan

Xuchang

Henan

Zhengzhou

Henan

Zhoukou

Henan

Changzhou

Jiangsu

Nanjing

Jiangsu

Nantong

Jiangsu

Suzhou

Jiangsu

Taizhou

Jiangsu

Wuxi

Jiangsu

Xuzhou

Jiangsu

Yancheng

Jiangsu

Yangzhou

Jiangsu

Zhenjiang

Jiangsu

Anshan

Liaoning

Fuxin

Liaoning

Jinzhou

Liaoning

Liaoyang

Liaoning

Panjin

Liaoning

Shenyang

Liaoning

Binzhou

Shandong

Dezhou

Shandong

Heze

Shandong

Jinan

Shandong

Jining

Shandong

Liaocheng

Shandong

Linyi

Shandong

Tai’an

Shandong

Zaozhuang

Shandong

Zibo

Shandong

Shanghai

Shanghai

Tianjin

Tianjin

Hangzhou

Zhejiang

Huzhou

Zhejiang

Jiaxing

Zhejiang

Ningbo

Zhejiang

Shaoxing

Zhejiang

Appendix 3

List of cities exposed to high drought risks for the electricity sub-sector

City

Province

Weinan

Shaanxi

Bengbu

Anhui

Bozhou

Anhui

Chaohu

Anhui

Chuzhou

Anhui

Fuyang

Anhui

Hefei

Anhui

Huaibei

Anhui

Huainan

Anhui

Lu’an

Anhui

Ma’anshan

Anhui

Suzhou

Anhui

Wuhu

Anhui

Xuancheng

Anhui

Beijing

Beijing

Dongguan

Guangdong

Huizhou

Guangdong

Jiangmen

Guangdong

Yangjiang

Guangdong

Bijie

Guizhou

Zunyi

Guizhou

Chengde

Hebei

Handan

Hebei

Langfang

Hebei

Qinhuangdao

Hebei

Shijiazhuang

Hebei

Tangshan

Hebei

Xingtai

Hebei

Zhangjiakou

Hebei

Qiqihar

Heilongjiang

Qitaihe

Heilongjiang

Shuangyashan

Heilongjiang

Anyang

Henan

Hebi

Henan

Jiaozuo

Henan

Jiyuan shi

Henan

Kaifeng

Henan

Luohe

Henan

Luoyang

Henan

Nanyang

Henan

Pingdingshan

Henan

Puyang

Henan

Sanmenxia

Henan

Xinxiang

Henan

Xinyang

Henan

Xuchang

Henan

Zhengzhou

Henan

Zhoukou

Henan

Zhumadian

Henan

Jingmen

Hubei

Suizhou Shi

Hubei

Xiangfan

Hubei

Yichang

Hubei

Changde

Hunan

Zhangjiajie

Hunan

Changzhou

Jiangsu

Huai’an

Jiangsu

Nanjing

Jiangsu

Wuxi

Jiangsu

Yangzhou

Jiangsu

Zhenjiang

Jiangsu

Benxi

Liaoning

Fushun

Liaoning

Huludao

Liaoning

Liaoyang

Liaoning

Shenyang

Liaoning

Hohhot

Nei Mongol

Hulunbuir

Nei Mongol

Ordos

Nei Mongol

Ulaan Chab

Nei Mongol

Yan’an

Shaanxi

Yulin

Shaanxi

Dezhou

Shandong

Heze

Shandong

Jinan

Shandong

Jining

Shandong

Laiwu

Shandong

Liaocheng

Shandong

Linyi

Shandong

Qingdao

Shandong

Rizhao

Shandong

Tai’an

Shandong

Weifang

Shandong

Yantai

Shandong

Zaozhuang

Shandong

Zibo

Shandong

Changzhi

Shanxi

Datong

Shanxi

Jincheng

Shanxi

Jinzhong

Shanxi

Linfen

Shanxi

Luliang

Shanxi

Shuozhou

Shanxi

Taiyuan

Shanxi

Xinzhou

Shanxi

Yangquan

Shanxi

Yuncheng

Shanxi

Tianjin

Tianjin

Appendix 4

List of cities that are exceptionally vulnerable in terms of infrastructure alone

City

Province

Xuancheng

Anhui

Beijing

Beijing

Baoding

Hebei

Langfang

Hebei

Tangshan

Hebei

Changzhou

Jiangsu

Nantong

Jiangsu

Suzhou

Jiangsu

Taizhou

Jiangsu

Wuxi

Jiangsu

Zhenjiang

Jiangsu

Shanghai

Shanghai

Tianjin

Tianjin

Hangzhou

Zhejiang

Huzhou

Zhejiang

Jiaxing

Zhejiang

Ningbo

Zhejiang

Shaoxing

Zhejiang

Appendix 5

Here, we summarise the verification process as in the Atlas of Natural Disaster Risk in China (Shi 2011). Figure 15 shows the drought hazard map from the Atlas. The red areas demonstrate higher potential for experiencing drought events.

Fig. 15
figure 15

Drought hazard map

To verify the results, data were obtained from the “China Natural Disaster Database” which contains a record of natural disasters at county level, reported in Chinese provincial newspapers between 1949 and 2010 (Chinese Academy of Sciences 2015). The database includes information on the start and end times, location, disaster type, impact, and journal sources.

Figure 16 shows the historical records of drought events between 1949 and 2010 at county level. Darker red areas demonstrate higher incidents of flooding events. Blank cells contain no data. As can be seen from the figure below, between 1949 and 2010, drought events occurred mainly in northern China.

Fig. 16
figure 16

Drought frequency at county level; for example, the maroon counties have an aggregate drought frequency in the range of 10–28 between 1949 and 2010

As counties contain multiple values of hazard level (Fig. 15), the average hazard level was calculated for each county. The correlation between the average hazard level for that county was then plotted with the historical hazard frequency for that county. Pearson and Spearman correlation tests were conducted, and it was demonstrated that the correlation between the hazard level map (Fig. 15) and the historical map (Fig. 16) is significant at 1 %. Results of the statistical tests are reported in the table below. For more verification details, please refer to the Atlas of Natural Disasters in China (Shi 2011) (Table 8).

Table 8 Correlation between drought hazard map and historical drought map at county level

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Hu, X., Hall, J., Shi, P. et al. The spatial exposure of the Chinese infrastructure system to flooding and drought hazards. Nat Hazards 80, 1083–1118 (2016). https://doi.org/10.1007/s11069-015-2012-3

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