Abstract
The coastal vulnerability to multi-hazard study aims to assess the coastal zones of Andhra Pradesh that really are vulnerable to various oceanogenic hazards. Using high-resolution coastal elevation, the maximum extent of coastal inundation during extreme high waves of cyclones & tsunamis, shoreline change, and sea-level rise can be computed. Vulnerability impact up to the village level was assessed based on future projection (return period) of multi-hazard impact using a holistic approach with geospatial techniques. The current study results revealed that 706 villages and 8 towns that are completely falling under CMZ are at risk. A total of 9682 km2 of coastal zones of Andhra Pradesh coast are exposed and prone to inundation as recorded under CMZ. Krishna, Godavari, Guntur and Prakasham districts comprise 70% of the total CMZ area are large low-lying areas exposed to ocean hazards. CMZ area along Andhra Pradesh coast recorded a significant negative correlation of − 0.65 with coastal elevation and a positive correlation of 0.34 with coastal exposure index. Shoreline change assessed from 1972 to 2019 across the study area reveals the 7% under high erosion along the headland and low-lying area of Krishna-Godavari delta. The outputs and maps produced in this study provide vital input for coastal disaster management and necessary policy interventions.
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Abbreviations
- CMZ:
-
Coastal multi-hazard zones
- CEI:
-
Coastal exposure index
- IPCC:
-
International Panel on Climate Change
- AR5:
-
Fifth assessment report
- MSL:
-
Mean sea level
- SED:
-
Socio-economic development
- CVI:
-
Coastal vulnerability index
- ALTM:
-
Air-borne LiDAR (Light Detection and Ranging) Terrain Mapping
- LiDAR:
-
Light detection and ranging
- NRSC:
-
National Remote Sensing Center
- ISRO:
-
Indian Space Research Organization
- DEM:
-
Digital elevation model
- MSS:
-
Multi-spectral scanner
- TM:
-
Thematic mapper
- ETM:
-
Enhanced thematic mapper
- ETM +:
-
Enhanced thematic mapper plus
- OLI:
-
Operational land imager
- GLOSS:
-
Global Sea Level Observing System
- IOC/UNESCO:
-
Intergovernmental Oceanographic Commission/United Nations Educational, Scientific and Cultural Organization
- NOAA:
-
National Oceanographic and Atmospheric Administration
- ERDAS:
-
Earth Resource Data Analysis System
- NIR:
-
Near infra red
- USGS:
-
United States Geological Survey
- SLPR2:
-
Sea level processing software
- NODC:
-
National Oceanographic Data Center
- GEV:
-
Generalized extreme value
- GAGAN:
-
GPS aided GEO augmented navigation
- GPS:
-
Global positioning system
- RMSE:
-
Root mean square error
- US:
-
United States
- MoES:
-
Ministry of Earth Sciences
- O-SMART:
-
Ocean-services, modelling, application, resources and technology
- GCPs:
-
Ground control points
- INCOIS:
-
Indian National Centre for Ocean Information services
- URL:
-
Universal resource locator
- ∆ :
-
Delta
- \(p\) :
-
Probability of non-exceedance
- ‘R’:
-
Return period in years
- ‘a’:
-
Scale factor i.e., offset value
- ‘u’:
-
Location factor which is slope
- U :
-
Extreme water level
- m:
-
Meters
- mm/y:
-
Millimeters per year
- m/y:
-
Meters per year
- km2 :
-
Square kilometers
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Acknowledgements
Authors would like to thank USGS for making available Landsat data on the opensource domain through earth exploration. The authors also thank USGS for sharing the DSAS tool for shoreline change assessment. NOAA, US is also acknowledged for making available sea-level trends. The authors also thank Secretary, MoES for his constant support and encouragement. This study is funded by project of INCOIS under the O-SMART umbrella scheme of MoES.
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Funding provided by Indian National Centre for Ocean Information Services, Ministry of Earth Sciences, India.
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Mahendra, R.S., Mohanty, P.C., Francis, P.A. et al. Holistic approach to assess the coastal vulnerability to oceanogenic multi-hazards along the coast of Andhra Pradesh, India. Environ Earth Sci 80, 651 (2021). https://doi.org/10.1007/s12665-021-09920-z
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DOI: https://doi.org/10.1007/s12665-021-09920-z