TITLE:
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
AUTHORS:
Usha Chirala, Bhavana Pedada
KEYWORDS:
Morphometry, Meghadrigedda, GIS, Mandal
JOURNAL NAME:
International Journal of Geosciences,
Vol.12 No.6,
June
30,
2021
ABSTRACT: With global warming and over-exploitation
of water resources due to population explosion and related issues, numerous
studies are being carried around the world in an
effort to reinstate a state of a balanced life between the existing water
resources and their utilization by human beings. Keeping in view, a watershed of 366 sq.km on
1:50,000 scale 65O/1 SOI map surrounding the Meghadrigedda reservoir in Visakhapatnam
district of Andhra Pradesh, India has been taken up for the study. The
watershed has been delineated into nine sub-watersheds and hydrogeomorphology,
drainage, drainage density, slope, NDVI and NDWI of the study area has been
carried out using Landsat data 2010 and Sentinel data 2020 in ARCGIS 10.0
environment. All the villages in the catchment greatly depend on groundwater for
irrigation, drinking as well as personal utilization. Change detection has been
carried on to display the decline in surface water and ground water due to
increased concentration of built-up land, siltation of ponds as well as
decrease in the number of ponds. The watershed is experiencing large scale
anthropogenic activities. The government must curb built-up activities and
desilt the ponds to sustain the monsoon water, facilitating more recharge. The
results of the study can serve as a basis for planning as well as for the
development of a sustainable basin area.