Water Harvesting Structure Positioning by Using Geo-Visualization Concept and Prioritization of Mini-Watersheds Through Morphometric Analysis in the Lower Tapi Basin |
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| Authors: | Dhruvesh P Patel Mrugen B Dholakia N Naresh Prashant K Srivastava |
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| Institution: | 1.LDRP-Institute of Technology and Research, Sector-15,Gandhinagar,India;2.Water Resources Management,LDCE,Ahmedabad,India;3.RMSI Ltd,Noida,India;4.Remote Sensing Technology, Department of Civil Engineering,University of Bristol,Bristol,UK;5.Department of Biological and Environmental Science,NVPAS,Anand,India |
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| Abstract: | Geo-visualization concept has been used for positioning water harvesting structures in Varekhadi watershed consisting of 26
mini watersheds, falling in Lower Tapi Basin (LTB), Surat district, Gujarat state. For prioritization of the mini watersheds,
morphometric analysis was utilized by using the linear parameters such as bifurcation ratio (Rb), drainage density (Dd), stream frequency (Fu), texture ratio (T), length of overland flow (Lo) and the shape parameter such as form factor (Rf), shape factor (Bs), elongation ratio (Re), compactness constant (Cc) and circularity ratio (Rc). The different prioritization ranks were assigned after evaluation of the compound factor. 3 Dimensional (3D) Elevation
Model (DEM) from Shuttle Radar Topography Mission (SRTM) and DEM from topo contour were analyzed in ArcScene 9.1 and the fly
tool was utilized for the Geo-visualization of Varekhadi mini watersheds as per the priority ranks. Combining this with soil
map and slope map, the best feasibility of positioning check dams in mini-watershed no. 1, 5 and 24 has been proposed, after
validation of the sites. |
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