Usha Chirala (2022) “Change Detection Using Landsat Data 2000 and Sentinel Data 2020 for Meghadrigedda Sub-Watersheds Using Hydrogeomorphology, NDWI and, NDVI, Visakhapatnam District, Andhra Pradesh-India”, Current Advances in Geography, Environment and Earth Sciences Vol. 4, pp. 77–93. doi: 10.9734/bpi/cagees/v4/2061B.