ANALYSIS OF RUNOFF THROUGH SCS-CN METHOD FOR SUSTAINABLE AGRICULTURE USING REMOTE SENSING AND GIS MODULES

The concept of sustainable agricultural management is essentially adoption of soil and water conservation practices in the agricultural land. The aims of these practices are proper land use, protecting land against all forms of deterioration, building and maintaining soil fertility, conserving water for form use, proper management of local water for drainage, flood protection and sediment reduction and increasing productivity from all land uses. The study area Kothapally Agricultural land is located in Kothapally village (longitude 780 5' to 78o 8'E and latitude 17 o 20' to 17o 24'N) in Ranga Reddy district, which is 47 km from the Hyderabad. It covers 507 ha of which 467 ha are cultivated and rest of 40 ha are wasteland, the water shed is characterized by an undulating topography with an average slope of about 2.5%. The broad objective of the present study is to estimate the daily runoff from the rainfall data using SCS-CN (Soil Conservation Service-Curve Number) method. The data of daily, monthly, and yearly rainfall, temperature, relative humidity, wind speed, evaporation data of 11 years data from 2006-2016, was collected from the ARI (Agricultural Research Institute, Rajendra Nagar), Hyderabad. The present study area involves collection of service data like satellite data, survey of India topo- sheets, and prepares various thematic maps like base map, contour map, drainage map, soil map, slope map, land use/ land cover map are prepared by using survey of India topo-sheets and satellite imageries. Soil map, study area map, drainage maps are prepared. The methodology is used for the analysis of data is the Soil Conservation Service- Curve Number (SCS-CN) of computation of runoff for the sustainable agricultural fields.