Field experiment of soil erosion characteristics under different surface conditions in Shenfu-Dongsheng coalfield exploitation area
LUO Ting, LI Hong-Wei, DAN Song, LI Jian-Meng, WANG Wen-Long
(1.Dadi Technology of Hangzhou Co., Ltd., 310000, Hangzhou; 2.College of Resources and Environment, Northwest A&F University, 712100, Yangling, Shaanxi; 3.Institute of Soil and Water Conservation，Northwest A&F University, 712100, Yangling, Shaanxi; 4.Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, 712100, Yangling, Shannxi：China)
Abstract：The objective of this paper was to determine soil erosion characteristics of different surface conditions (original ground, disturbed road, unhardened road, spoil, waste slag with more sand than stone and waste slag with less sand than stone) on soil erosion by washout experiment in Shenfu-Dongsheng coalfield area. The results show that: 1) There were positive linear correlations between erosion amount and runoff amount or flow shear stress for all of underlaying surfaces. There were positive power function relations between erosion amount and runoff amount for original soil, disturbed road and unhardened road. There were positive linear relationships between erosion amount and runoff amount for spoil and waste slag with more sand than stone. There were logarithmic regressions between erosion amount and flow shear stress for all of surface conditions. On waste slag with less sand than stone, it was a exponential function relation between erosion amount and runoff amount and a positive linear relationship between erosion and flow shear stress. 2) Earth-dump could be eroded easily compared to original soil. The average erosion amount of spoil was the maximum 22.68kg/m2 reached to 45.27 times as great as that of original soil. The erosion amount of sand more than stone waste slag increased by 19.61 times than original soil. The erosion amount of waste slag with more sand than stone increased by 10.61 times than original soil. However，the erosion amount of disturbed soil and unhardened road only increased by 4.35, 4.41times compared to original soil.
2012, Vol. 10 
