Vol. 11, Special Issue 1 (2022)

Author(s):
RR Surve, HN Bhange, BL Ayare, PM Ingle and PR Kolhe

Abstract:
Tetavali watershed of Dapoli taluk in Ratnagiri district is undertaken the study for selection of water harvesting structures using remote sensing and GIS technology. The SRTM DEM (30m) is used to prepare thematic layers viz slope map, drainage map, drainage density map. LANDSAT-8 image is used to prepare the Land use/ land cover map of study area. Lithology map and Geomorphology map is downloaded from Bhukosh –geological survey of India portal. Soil texture map of Tetavali watershed is prepared using soil texture data available with CAET, Dapoli. The weightages are assigned to the layers as per their contribution to suitability and ranking is allotted to each thematic layer. Integration of all thematic layers with assigned ranking gave suitability map of study area. Study found thirteen suitable structures for water harvesting. 6 farm ponds, 3 check dams, 2 percolation ponds, 1 cement nala bund and 1 earthen nala bund found suitable with 278.36 ha area suitable for water harvesting structure construction and 103.64ha of watershed not suitable for water harvesting structures.