Field assessment of surface runoff, sediment yield and soil erosion in opencast mines in Chirimiri area, Chhattisgarh, India

Publication date: Available online 18 July 2017 Source:Physics and Chemistry of the Earth, Parts A/B/C Author(s): G.K. Nigam, R.K. Sahu, M.K. Sinha, X. Deng, R.B. Singh, P. Kumar Chirimiri Coal field is located in the Koriya district of Chhattisgarh state of India. It lies in the valley of the Hasdeo River and is spread over 125 km2 area. Ever increasing problem of declining forest resources and water quality is a cause of concern particularly due to excessive soil erosion resulting into soil debris deposition from the overburdened dump. Dwindling resources has compelled the policy makers to search for alternative such as waste lands and mined areas to augment/improve soil and water resources for use in agriculture and allied sectors while maintaining the local ecology and hydrology. Most Opencast mines releases huge amount of mining wastes as overburden dump (OBD) materials that are prone to soil erosion and create problems of sedimentation and water quality, affecting agriculture. Historical daily rainfall data for 21 years and daily surface runoff as estimated by SCS-Curve Number method were analysed. Sediment yield was estimated at lower end of erosion face of OBD and near drainage outlet of opencast mine. Assessment of soil erosion from OBD materials was made by RUSLE (Revised Universal Soil Loss Equation) method and was compared with direct field measurements by placing plastic sheets in downstream portion of OBD. As results monsoon rainfall constitutes 91.6 pe...
Source: Physics and Chemistry of the Earth, Parts ABC - Category: Science Source Type: research