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| Comparison of runoff generation,sediment yield and hydrodynamic parameters on the undisturbed and the disturbed land surface in the Shenfu-Dongsheng coalfield |
| Wang Zhen1,Wang Wenlong1,2,Jin Jian3,Luo Ting2,Wang Hao4 |
| 1.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,712100,Yangling,Shaanxi;2.Northwest Sci-technological University of Agriculture and Forestry,712100,Yangling,Shaanxi;3.Xifeng Soil and Water Conservation Experimental Station,745000,Qingyang,Gansu;4.Agriculture and Forestry University of Fujian,350002,Fuzhou: China |
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Abstract The disturbed land of the exploitation in the shenfu-dongshen coalfield destroyed the ground vegetation cover and the soil structure,caused serious soil erosion.The changing discipline of the runoff generation,sediment yield and the hydrodynamic parameters of the disturbed land have been analyzed.The result indicated: the runoff generation time of the disturbed land was less than that of the undisturbed land;the intensity of runoff yield,the initial sediment yield and the intensity of the sediment yield of the disturbed land was separately 1-2 times,10-30 times and 10-50 times more than that of the undisturbed land.The Reynolds number and the resistance coefficient of the disturbed land was more than that of the undisturbed land.There was not obviously different in the Froude number.Experienced equations were simulated by the relationships between the runoff generation,sediment yield and hydrodynamic parameters.Some important references are proved for the exploitation and management of the coal fields.
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Received: 12 July 2010
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