A MULTI CRITERION DECISION APPROACH FOR IDENTIFICATION OF POTENTIAL FLOOD RISK ZONES IN HUSSAINSAGAR WATERSHED USING GEOMATICS- A CASE STUDYPadmaja G. and Giridhar M.V.S.S.Abstract Urban flooding is becoming a major threat in the recent times due to changes in the land use land cover leading to chaos, loss of livelihood, damage to property, infrastructure and utilities. The main objective of the present study is to assess the current state of land use, assess the impact of these temporal changes on the basin hydrology over the past few years. The study was initiated to identify how increase in impervious layer due to construction activities over a decade have significantly increased the potential flood risk zones in and around the Hussainsagar catchment using multi criterion decision support system using GIS and RS techniques. From the analysis it was observed that there is an increase of almost 32.6% in the built-up area from 104.05 km2 to 154.39 km2,38.20% reduction in open space, 51.75% in agricultural and, 14.10% decrease in vegetation cover, of the total catchment area between the years 2005 and 2019. These changes in the land use have not only altered the basin hydrology but also augmented the extent of potentially high flood risk zones in the proposed study leading to frequent flooding over the past few years. |