Hydrogeomorphology, NDWI and, NDVI of the Meghadrigedda Sub-Watersheds for Optimal Utilization of Resources, Visakhapatnam District, Andhra Pradesh-India Using Landsat Data 2000 and sentinel Data 2020

Abstract

With global warming and over-exploitation \nof water resources due to population explosion and related issues, numerous \nstudies are being carried around the world in an \neffort to reinstate a state of a balanced life between the existing water \nresources and their utilization by human beings. Keeping in view, a watershed of 366 sq.km on \n1:50,000 scale 65O/1 SOI map surrounding the Meghadrigedda reservoir in Visakhapatnam \ndistrict of Andhra Pradesh, India has been taken up for the study. The \nwatershed has been delineated into nine sub-watersheds and hydrogeomorphology, \ndrainage, drainage density, slope, NDVI and NDWI of the study area has been \ncarried out using Landsat data 2010 and Sentinel data 2020 in ARCGIS 10.0 \nenvironment. All the villages in the catchment greatly depend on groundwater for \nirrigation, drinking as well as personal utilization. Change detection has been \ncarried on to display the decline in surface water and ground water due to \nincreased concentration of built-up land, siltation of ponds as well as \ndecrease in the number of ponds. The watershed is experiencing large scale \nanthropogenic activities. The government must curb built-up activities and \ndesilt the ponds to sustain the monsoon water, facilitating more recharge. The \nresults of the study can serve as a basis for planning as well as for the \ndevelopment of a sustainable basin area.