文献类型：期刊文献

英文题名：Effects of Rainfall Intensity and Slope Gradient on Runoff and Soil Moisture Content on Different Growing Stages of Spring Maize

作者：Mu, Wenbin[1,2] Yu, Fuliang[1] Li, Chuanzhe[1,3] Xie, Yuebo[2] Tian, Jiyang[1] Liu, Jia[1,4] Zhao, Nana[5]

第一作者：Mu, Wenbin

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]Hohai Univ, Coll Hydrol & Water Resources, Nanjing 210098, Jiangsu, Peoples R China;[3]Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Hubei, Peoples R China;[4]Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China;[5]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China

年份：2015

卷号：7

期号：6

起止页码：2990-3008

外文期刊名：WATER

收录：;EI(收录号：20153201153580);Scopus(收录号：2-s2.0-84938703087);WOS:【SCI-EXPANDED(收录号:WOS:000361034400012)】；

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 Nos. 51209225 and 51409270), the Open Research Fund Program of State Key Laboratory of Water Resources and Hydropower Engineering Science (2012B093), and the Open Research Fund Program of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering (2014490611).

语种：英文

外文关键词：Arid regions - Infiltration - Nonlinear equations - Rain - Regression analysis - Soil moisture - Vegetation

摘要：The rainfall-runoff process (RRP) is an important part of hydrologic process. There is an effective measure to study RRP through artificial rainfall simulation. This paper describes a study on three growing stages (jointing stage, tasseling stage, and mature stage) of spring maize in which simulated rainfall events were used to study the effects of various factors (rainfall intensity and slope gradient) on the RRP. The RRP was tested with three different rainfall intensities (0.67, 1.00, and 1.67 mm/min) and subjected to three different slopes (5 degrees, 15 degrees, and 20 degrees) so as to study RRP characteristics in semiarid regions. Regression analysis was used to study the results of this test. The following key results were obtained: (1) With the increase in rainfall intensity and slope, the increasing relationship with rainfall duration, overland flow, and cumulative runoff, respectively, complied with logarithmic and quadratic functions before reaching stable runoff in each growing stage of spring maize; (2) The runoff coefficient increased with the increase in rainfall intensity and slope in each growing stages of spring maize. The relationship between runoff coefficient, slope, rainfall intensity, rainfall duration, antecedent soil moisture, and vegetation coverage was multivariate and nonlinear; (3) The runoff lag time decreased with the increase in rainfall intensity and slope within the same growing stage. In addition, the relationship between runoff lag time, slope, rainfall intensity, antecedent soil moisture, and vegetation coverage could also be expressed by a multivariate nonlinear equation; (4) The descent rate of soil infiltration rate curve increased with the increased rainfall intensity and slope in the same growing stage. Furthermore, by comparing the Kostiakov, Horton, and Philip models, it was found that the Horton infiltration model was the best for estimating soil infiltration rate and cumulative infiltration under the condition of test.