Pravendra KumarKaushal Kishor2018-05-312018-05-312017-06http://krishikosh.egranth.ac.in/handle/1/5810048369Conservation of precious natural resources like soil and water which are depleting day by day at an alarming rate is essential for prosperity and growth. Considering this fact in the mind, present study is conducted for rainfall-runoff modeling and planning of rainwater harvesting structures using RS and GIS techniques in Gola watershed, Uttarakhand, India. Gola Watershed stretches over about 590.0274 km2 area. Landsat 8 data, ASTER data and Google earth data were used for developing different thematic map layers like watershed boundary map, LULC map, soil map, HSG map, drainage map, DEM map, basin map, slope map and buffer map of built-up land and intersection of these layers was performed for rainfall-runoff modeling and planning of RWHS in GIS environment. QGIS 2.16.3 and ENVI 4.8 softwares were used. Daily rainfall and runoff data of Kathgodam gauging station during years 2006 to 2015 (monsoon season) for Gola watershed were used for runoff estimation using NRCS-CN model to justify the availability of runoff potential for proposed rainwater harvesting structures. IMSD guidelines were followed for potential suitable RWHS zones map and potential site suitability map. In this study, Check Dam, Percolation Tank and Farm Pond were decided based on thematic map layers. Predictive performance of NRCS-CN model for the estimation of surface runoff was satisfactory with r, RMSE and CE values of 0.89, 8.61 and 60.15 %, respectively. Thus, this model can be successfully applied in Gola watershed for estimation of surface runoff. Number of potential suitable sites of RWHS for Check Dam, Percolation Tank and Farm Pond were found as 44 with the area of 1.2383 km2, 8 with the area of 0.3246 km2 and 78 with the area of 4.1866 km2, respectively. Daily water balance was estimated for Gola watershed using NRCS-CN model. Average runoff volume from Gola watershed was computed as 433.6524 Mm3 with an average runoff coefficient of 32.03 % over ten years. Thus, proposed RWHS could utilize huge amount of available runoff in Gola watershed which reduces the flood, recharges the unconfined aquifer of Bhabar area and provide supplemental irrigation in downside area.ennullThesis