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[1]LUO Ting,LI Hong-wei,BAI Yun.Study on the Newly Occurred Soil and Water Loss on the Disturbed Lands in the Site of Development and Construction[J].Research of Soil and Water Conservation,2012,19(03):30-35.

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Study on the Newly Occurred Soil and Water Loss on the Disturbed Lands in the Site of Development and Construction

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 03 Page number: 30-35 Column: Public date: 2012-06-20

Title:: Study on the Newly Occurred Soil and Water Loss on the Disturbed Lands in the Site of Development and Construction

Author(s):: LUO Ting¹, LI Hong-wei^1,2, BAI Yun¹; 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: disturbed land; newly occurred soil and water loss; infiltration rate; runoff rate; sediment generation; Shenfu-Dongsheng coalfield

CLC:: S157.1

DOI:: -

Abstract:: Based on the severe newly occurred soil and water loss caused by the mining exploitation in the Shenfu-Dongsheng coal mining area, mechanism of newly occurred soil and water loss and soil loss tolerance were studied by using field water discharge scouring experiments. The results showed that the average water infiltration rate of original soil increased by 30% compared to disturbed soil surface under the same flow discharge and slope; runoff rate increased with time duration under the different surface conditions. About within 6 minutes before at the beginning of scouring, runoff rate was all little and the runoff rate in original soil surface was more than that in disturbed soil surface, after 6 minutes, runoff rate increased significantly, and the runoff rate in original soil surface was less than that in disturbed soil surface, the average runoff rate of disturbed soil surface increased by 14% compared to that in original soil surface; the sediment generation of original soil surface kept a constant level basically in the whole souring process, and obvious change of sediment yield was not observed. The sediment generation of disturbed soil surface was highest within 0-15 min, and then it decreased with time duration and tended to stable finally, the average sediment concentration increased by 96% and the average sediment yield increased by 89% compared to original soil surface; Newly occurred soil and water loss increased with flow discharge and slope increased and was the highest for slope with gradient of 10°. Under the same slope conditions, the percentages of soil loss increase were higher when flow discharge was smaller.

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