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Mahato, PK, Singh, D, Bharati, B, Gagnon, AS, Singh, BB and Javanarayanan, B (2022) Assessing the Impacts of Human Interventions and Climate Change on Fluvial Flooding using CMIP6 Data and GIS-based Hydrologic and Hydraulic Models. Geocarto International. ISSN 1010-6049
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Assessing the impacts of human interventions and climate change on fluvial flooding using CMIP6 data and GIS based hydrologic.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (6MB) | Preview |
Abstract
This study presents an approach for modelling and mapping fluvial flooding, considering both land use/land cover (LULC) change and climate change, and applies it to the Brahmani River Basin in eastern India. Climate change projections were obtained from the Coupled Model Intercomparison Project Phase 6 (CMIP6), and their impacts on the hydrology of the catchment were investigated using HEC-HMS and HEC-RAS software. Results reveal that changes in LULC types, specifically an increase in proportions of agricultural and built-up areas and a decrease in forest cover, as undergone between years 1985 and 2018, have increased peak discharge following a storm, thereby causing an increase in spatial extent of floods of different return periods. Moreover, downscaled climate change scenarios from two General Circulation Models were used to determine potential changes in river discharge according to two GHG emission scenarios from the latest IPCC: SSP245 and SSP585. The projections indicate that peak discharge and the spatial extent of flooded areas will increase for floods with return periods ranging from two to 100 years. This study demonstrates the important influence that changes in LULC have had on the susceptibility of the BRB to flooding, with climate change projected to further enhance the risk of flooding as the century progresses. The findings of this research will promote flood risk management in the basin and widen our global understanding of the human and environmental attributions of flood risk.
| Item Type: | Article |
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| Uncontrolled Keywords: | 0909 Geomatic Engineering |
| Subjects: | G Geography. Anthropology. Recreation > GE Environmental Sciences |
| Divisions: | Biological & Environmental Sciences (from Sep 19) |
| Publisher: | Taylor and Francis |
| Date Deposited: | 08 Apr 2022 08:21 |
| Last Modified: | 10 May 2022 15:15 |
| DOI or ID number: | 10.1080/10106049.2022.2060311 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/16622 |
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