Flood Hazard Vulnerability Assessment by using Geo Spatial Techniques: Krishna and Guntur Districts, Andhra Pradesh

Abstract

The study on flood hazard vulnerability assessment of Guntur and Krishna district in Andhra Pradesh. The present study has attempted by using the historical flood inundation data (2000-2020) and obtain flood hazard zones using multi temporal data sets through remote sensing and GIS. The Krishna floods of 2020 have been used as a case study for ground-truthing verification. Flood Hazard Zonation (FHZ)mapwas generated after getting flood hazard layers and integrating them in the GIS environment using a multi-criteria overlay analysis approach.The flood hazard zones has been classified into low, moderate and highbased on frequency of floods, their spatial extent and number of flooding events occurred in the study area during last 21 years. About414 villages are identified as low hazard category, 58 villages fall in Moderate and 35 villages are in High flood hazard category in the study area. Minimizing Disaster Risk Reduction, the Government particularly the disaster management authorities shall integrate long-term mitigation strategies based on risk assessment and geospatial technologies for sustainable development and planning.