文献类型：期刊文献

英文题名：Investigation of Rainfall-Runoff Processes and Soil Moisture Dynamics in Grassland Plots under Simulated Rainfall Conditions

作者：Zhao, Nana[1,2] Yu, Fuliang[1] Li, Chuanzhe[1,3] Wang, Hao[1] Liu, Jia[1] Mu, Wenbin[1]

第一作者：Zhao, Nana;赵娜娜

通信作者：Yu, FL[1]

机构：[1]China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China;[2]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China;[3]Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China

年份：2014

卷号：6

期号：9

起止页码：2671-2689

外文期刊名：WATER

收录：;EI(收录号：20143900071887);Scopus(收录号：2-s2.0-84907173081);WOS:【SCI-EXPANDED(收录号:WOS:000342902900008)】；

基金：This study was supported by the Foundation of China Institute of Water Resources and Hydropower Research (1232), the International Science and Technology Cooperation Program of China (Grant No. 2013DFG70990), the National Natural Science Foundation of China (Grant No. 51209225), the Open Research Fund Program of State Key Laboratory of Water Resources and Hydropower Engineering Science (2012B093) and the Science and Technology Foundation for Selected Overseas Chinese Scholars, Ministry of Human Resources and Social Security of the People's Republic of China.

语种：英文

外文关键词：rainfall-runoff; soil moisture; interflow; soil cover; runoff coefficient; slope position

摘要：The characteristics of rainfall-runoff are important aspects of hydrological processes. In this study, rainfall-runoff processes and soil moisture dynamics at different soil depths and slope positions of grassland with two different row spacings (5 cm and 10 cm, respectively, referred to as R5 and R10) were analyzed, by means of a solution of rainfall simulation experiments. Bare land was also considered as a comparison. The results showed that the mechanism of runoff generation was mainly excess infiltration overland flow. The surface runoff amount of R5 plot was greater than that of R10, while the interflow amount of R10 was larger than that of R5 plot, although the differences of the subsurface runoff processes between plots R5 and R10 were little. The effects of rainfall intensity on the surface runoff were significant, but not obvious on the interflow and recession curve, which can be described as a simple exponential equation, with a fitting degree of up to 0.854-0.996. The response of soil moisture to rainfall and evapotranspiration was mainly in the 0-20 cm layer, and the response at the 40 cm layer to rainfall was slower and generally occurred after the rainfall stopped. The upper slope generally responded fastest to rainfall, and the foot of the slope was the slowest. The results presented here could provide insights into understanding the surface and subsurface runoff processes and soil moisture dynamics for grasslands in semi-arid regions.