A STUDY ON FLOOD SUSCEPTIBILITY ZONES OF BENGALURU URBAN USING GEOSPATIAL AND ANALYTICAL HIERARCHY PROCESS TECHNIQUES

• Published in: International Journal For Multidisciplinary Research Vol. 7; no. 3
• Main Authors: H. R, Amrutha Rani, E. R, Yatish Ram, Ravikumar, A. S.
• Format: Journal Article
• Language: English
• Published: 25.06.2025
• ISSN: 2582-2160; 2582-2160
• DOI: 10.36948/ijfmr.2025.v07i03.49284

Conventional method of flood susceptibility requires historical data to map flood plain area, which requires a detailed survey and more expensive. Some of the data required for flood mapping is very difficult to obtain from ground measurements. The conventional methods have been reduced by geospatial techniques. Hence, in the present study an attempt has been made to assess the flood prone areas of Bengaluru urban by using geospatial and Analytical Hierarchy Process (AHP) techniques. The Bengaluru urban area is located in the southeast of Karnataka state and geographically lies between 12°49’5” N and 13°8’32” N latitude and 77°27’29” E and 77°47’2” E longitude and comprises three valleys namely Hebbal, Koramangala Challaghatta (KC) and Vrishabhavathi. The classified images of SRTM DEM 30 m resolution and Sentinel-2 10 m resolution data have been used to derive thematic maps. The causative factors such as precipitation, elevation, slope, drainage density, land use / land cover, topographic wetness index, distance from road and distance from river have been considered to derive the weights and then integrated using weighted overlay technique to prepare a flood susceptibility map. The results of the study showed that, the KC valley and Hebbal valley are more susceptible to high flood than Vrishabhavathi valley.