Vol. 9, Special Issue 2, Part A (2025)

Runoff drains from a catchment area through a channel after satisfying all surface and subsurface needs. The incidence and magnitude of runoff are contingent upon the attributes of the rainfall event. Non- availability of continuous runoff records in majority of Indian watersheds has led to the development of techniques for estimation of surface runoff. The Soil Conservation Service Curve Number (SCS-CN) method, from the SCS National Engineering Handbook (SCS NEH), is a widely used hydrological design tool.

The study area situated in the Mahatma Phule Krishi Vidyapeeth Central Campus occupying an area of 475 ha located between 19° 19' to 19° 22' North Latitude and 74° 36' to 74° 40' East longitude. The annual runoff of study area was computed for year 2021 using SCS-CN (NRCS) method. Maps such as stream order map, DEM map, HSG map, CN map, and land use/ land cover map were prepared for the micro-watershed Surface runoff in terms of depth and volume is estimated by NRCS Curve number method and later runoff percentage was calculated with the help of rainfall volume and total runoff volume done using ArcGIS 10.5 version.

The MPKV Central Campus (West) watershed experienced 278.97 mm of annual runoff in 2021, equivalent to 28.86% of the 966.40 mm total rainfall. Weighted curve numbers were 53.53 (CN_I), 73.28 (CN_II), and 86.32 (CN_III) for AMC I, II, and III, respectively. Runoff percentage was calculated as 28.86% in the year 2021. The estimated runoff of 278.97 mm can be utilized for optimum design of the soil and water conservation structures. These estimated runoff before development of MPKV Central Campus watershed can be used for comparison or impact assessment of soil and conservation measures adopted for development of the watershed.