Simulation of the Impact of Check Dams on Runoff in Xiliugou Watershed in the Upper Yellow River

被引：0
作者：
Liu L. [1 ]
Li Q. [1 ]
Liu X. [2 ]
Sun Y. [1 ]
Zhong L. [1 ]
机构：
[1] School of Water Resources, North China University of Water Resources and Electric Power, Zhengzhou
[2] College of Information Engineering, North China University of Water Resources and Electric Power, Zhengzhou
来源：
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | 2020年 / 28卷 / 03期
关键词：
Check dam; Runoff; Runoff reduction; SWAT model; Timeliness; Xiliugou Watershed;
D O I：
10.16058/j.issn.1005-0930.2020.03.006
中图分类号：
学科分类号：
摘要：
Different check dams have been constructed in Xiliugou watershed in the upper Yellow River to solve the flood and sediment disaster caused by soil and water losses.In order to figure out the role of check dams on the runoff, a modified Soil and Water Assessment Tool(SWAT) model was set up by coupling with a new water balance module of check dam.The results showed that the monthly runoff simulated agreed well with the observed values in both calibration and validation periods.The coefficients of determination(R2) were larger than 0.70, the Nash-Sutcliffe Efficiencies(ENS) were greater than 0.50, and the relative error(Re) were smaller than 20% indicating that the modified SWAT model performed well in the simulations.Based on the modified SWAT model, this study used three scenarios to simulate the effects of different numbers of check dams on the runoff.Results showed that check dams were efficient in controlling the runoff, and the runoff at the outlet of the study region decreased obviously with the increasing check dams.Compared with the present scenario(i.e., including 39 key dams), the annual runoff would increase by 25% under the scenario with no check dams, and would reduce by 75% under the future scenario(118 key dams).This study quantified the impact of the check dams on the runoff based on the modified SWAT model, which offers a foundation for investigating the relation between water and sediments influenced by the check dams. © 2020, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
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页码：562 / 573
页数：11
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