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[1]LIU Quan,LI Peng,LI Zhanbin,et al.Study on Characteristics of Losses of Runoff and Sediment in Slope Land Under Simulated Rainfall[J].Research of Soil and Water Conservation,2015,22(03):1-5.

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Study on Characteristics of Losses of Runoff and Sediment in Slope Land Under Simulated Rainfall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 03 Page number: 1-5 Column: Public date: 2015-06-28

Title:: Study on Characteristics of Losses of Runoff and Sediment in Slope Land Under Simulated Rainfall

Author(s):: LIU Quan^1,3,5, LI Peng², LI Zhanbin^2,3, CHEN Lei⁴, ZHOU Ping⁶; 1. Mianyang Normal University, Mianyang, Sichuan 621000, China;
2. Xi’an University of Technology, Xi’an 710048, China;
3. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
4. Chang’an University, Xi’an 710064, China

Keywords:: simulated rainfall; amount of cumulative runoff yield; amount of cumulative sediment yield; land use type; response

CLC:: S157.1

DOI:: -

Abstract:: The response characteristics of runoff and sediment losses in bare land, abandoned land, grassland and wood land in Qiaozigou Watershed were investigated based on two different simulated rainfall intensities which were 90 mm/h and 120 mm/h, respectively. The results were as follows： The amount of cumulative runoff yield was the least in wood land and the maximum amount occurred in bare land which was 7 times of the former. The amount of cumulative sediment yield decreased in the sequence of abandoned land > bare land > grass land > wood land, and the amount of cumulative sediment yield decreased in the order of bare land > abandoned land > grass land > wood land. With the increase of runoff duration in the rainfall process, the amount of cumulative runoff yield and the amount of cumulative sediment yield showed the linear relationship with yield duration of runoff and sediment, respectively. Both runoff coefficient and the sediment coefficient decreased in the order of abandoned land > bare land > grass land > wood land. In four land use types, the response of amount of cumulative sediment yield to cumulative runoff yield could be described by the power function. Moreover, with the increase of amount of cumulative runoff in the rainfall process, the gradient of the cumulative sediment yield increased dramatically.

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