International Journal of Advances in Engineering & Scientific Research

International Journal of Advances in Engineering & Scientific Research

Print ISSN : 2349 –4824

Online ISSN : 2349 –3607

Frequency : Continuous

Current Issue : Volume 1 , Issue 5
2014

ESTIMATION OF SURFACE RUNOFF BY SCS CURVE NUMBER MODEL FOR HAROHALLI WATERSHED

*Nanjundi.P, **Dr.M.Inayathulla, ***Sandhya M. C, ****Ravindranath C

*Assistant Professor, Department of Civil Engineering, NMIT, Bangalore-560064.Karnataka, India,  **Associate Professor, Department of Civil Engineering, UVCE, Bangalore-560056.Karnataka, India.,  ***ME student in Department of Civil Engineering, UVCE, Bangalore -560056.Karnataka, India,   ****Research student in Department of Civil Engineering, SIT, Tumkur .Karnataka, India.

DOI : Page No : 04-107

Published Online : 2014-09-30

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Abstract­

Runoff is one of the most important hydrological variables used in most of the water resources applications. In the present study Harohalli watershed, Kanakapura Taluk, Ramanagara District area was chosen since it falls in the rocks and granite area of Karnataka state, India is carried out using SCS and GIS techniques. The study area covers an area of 281.56 km2 and comprises of eleven micro watersheds. Physiographically the area is characterized by undulating topography with plains and shallow valleys. The Soil Conservation Service Curve Number (SCS CN) also known as hydrologic soil group method was used in this study. This method is a versatile and popular approach for quick runoff estimation and is relatively easy to use with minimum data and it gives adequate result. From the study, monthly as well as annual rainfall and corresponding runoff were estimated.

KEYWORDS: Estimation, Infiltration, Landuse, Rainfall, Runoff, Watershed