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Rainfall and runoff are significant constitute the sources of water for recharge of ground water in the watershed. Rainfall is a major the primary source of recharge into the ground water. Other, substantial sources of recharge include seepage from tanks, canals, streams and functional irrigation. Evaluation of water availability by understanding of rainfall and runoff is essential. Hydrometeorological and hydrological data are an important role in the assessment of source water accessibility for planning and design of artificial recharge structures. The surface water resources are available in the watershed from runoff from rivers, streams and in surface water bodies. The total area of study is about 179.4 km2, of which fall in the Vaniyar sub basin but pappiredipatti is one of the main catchment of area of the basin so considered for runoff model assessment in a watershed is a precondition for the design of artificial recharge structures, reservoir and soil erosion control. Surface water resource planning and management is an important and critical issue in the hard rock regions. Runoff in a watershed affected by geomorphological factors, particularly, land use change affects the runoff volume and the runoff rate significantly. In the Present case study assumed to estimate the surface runoff from a catchment but one of the Curve Number methods is mostly used. The SCS–CN method is useful for calculating volume of runoff from the land surface meets in the river or streams. The proposed construction of artificial recharge structures can be thought of in the given study area. This output is useful for the watershed development and planning of water resources effectively.
Satheeshkumar et al. (Sun,) studied this question.