期刊名称：International Research Journal of Earth Sciences
电子版ISSN：2321-2527
出版年度：2015
卷号：3
期号：7
页码：11-22
语种：English
出版社：International Science Community Association
摘要：Runoff and soil erosion are two major hydro-morphological entities operating in a watershed. In the present paper Bakreshwar river basin draining through the Rarh regions of Eastern India, having 714.56 sq. km. area has been selected for the estimation of runoff using curve number (CN)method of the US Soil Conservation Service (SCS) and soil surface lowering using Revised Universal Soil Loss Equation (RUSLE) and 4 years field based pegging operation. Several secondary and field based data have been assembled and processed using statistical and advanced application GIS techniques. The result shows that, an average of 55% of total annual rainfall flowing out as surface runoff with a associated removal of about 6.99 tons/ha/year of eroded soil in the Bakreshwar watershed. Seasonal runoff coefficient varies from 0.688 in monsoon to 0.185 in pre-monsoon. Surface lowering rate ranges from 0-17mm/year. The statistical relationship indicates that runoff positively controls soil loss. However, the resulting coefficient of determination (R2) values (0.267) invokes that runoff is not the prime vectors for soil loss. Information provide in the present study for the un-gauged river basin is reasonably essential for planning, designing and evaluation of soil conservation projects, water pollution control measures and flood or drought control programs.
