EGU2020-1078, updated on 12 Jun 2020
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Flood Risk Characterization of Highly Flood-prone Data Scarce Region under Changing Climate

Aditya Gusain1, Naveen Sudharsan1, Subhankar Karmakar1,2,3, and Subimal Ghosh2,3,4
Aditya Gusain et al.
  • 1Environmental Science and Engineering Department, IIT Bombay, Powai, Mumbai, Maharashtra-400076 (India)
  • 2Interdisciplinary Programme in Climate Studies, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra-400076 (India)
  • 3Centre for Urban Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra-400076 (India)
  • 4Department of Civil Engineering, IIT Bombay, Powai, Mumbai, Maharashtra-400076 (India)

It is evident that changes in climate alter the incidence of hydro-climatic extreme events, specifically floods, which are likely to cause irreparable socio-economic and ecological damages. With a 7,516 km coastline that is prone to climate-mediated disturbances and cyclones, the eastern coast of the Indian subcontinent is comparatively more vulnerable to the changing climate and land use with higher incidences of extensive flooding. Therefore, the policy-makers and decision-making authorities are dependent on the scientific community to provide reliable estimates of hydro-meteorological variables for simulating extreme events under the impact of climate change. However, a comprehensive flood risk framework at a finer administrative level is not yet available under the Indian scenario that assesses the changing dynamics and complexities of different components of climatic risk (hazard, vulnerability, and exposure). The present study attempts to demonstrate a proposed framework of flood risk assessment for a highly flood-prone deltaic region of Mahanadi River Basin, India, under climate change scenarios for near-future (the 2040s) at present-day vulnerability and exposure status. It was noted that changes in future flood risk are highly influenced by the vulnerability and exposure status of the region. Lower vulnerability and exposure in coastal sub-districts reduces the overall risk even if a higher flood hazard is observed. Under both future scenarios, RCP 4.5 and 8.5, the number of villages under high hazard zones with greater flood magnitude has increased. Therefore, it thrusts upon the need to adopt stringent actions for devising better adaptation strategies and sustainable planning which can aid in lowering the vulnerability of the region to future floods.

How to cite: Gusain, A., Sudharsan, N., Karmakar, S., and Ghosh, S.: Flood Risk Characterization of Highly Flood-prone Data Scarce Region under Changing Climate, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-1078,, 2019

This abstract will not be presented.