COMPARISION OF HYPSOMETRIC PARAMETERS OF BANGLAORE URBAN WATERSHEDS USING REMOTE SENSING AND GIS TECHNIQUES

Amrutha Rani H. R.*
Periodicity:April - June'2025

Abstract

Hypsometric analysis is considered as an effective tool to understand the stages of geomorphic status and geological development of river basin and for delineation of erosion proneness of watershed. Bangalore urban has been subjected for rapid urbanisation due to which there is an increased water demand over a period of time. Hence, to tackle the growing water scarcity and reoccurrence of droughts and floods, an attempt has been made in the present study to investigate and understand the morphometry and derivation of hypsometric curves and hypsometric integrals of the watersheds of Bangalore urban area. Bengaluru Urban is a densely populated city which is geographically lies between 12o49’5” N to 13o8’32” N and 77o27’29” E to 77o47’2” E. In Bangalore urban area, KC valley and Hebbal flows towards south-east direction and Vrishabhavathi valley towards south-west direction and divide Bengaluru into three distinct and separate drainage zones. The SRTM-DEM data  has been  used for hypsometric analysis purposes. The downloaded DEM tiles are mosaiced in the Arc map version 10.4 environment. Using Arc Spatial analysis tool, hypsometric analysis has been carriedipout  and generated the hypsometric curves and hypsometic integrals on watershed wise. The hypsometric curves which is concave upwards at higher elevations and convex downward at low elevation indicates that KC valley, Vrishabhavathi valley and Hebbal valley are approaching the mature stage will have less rate of erosion and characterised by concave upward at high elevation having HI values 0.45, 0.54 and 0.48 respectively. The findings will help in recommendation of appropriate mitigation measures. 

Keywords

Hypsometric analysis, RS, GIS, Watershed, Hypsometric Integral, Hypsometric curve

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