| 不同坡度和前期土壤含水率条件下裸地降雨产流试验研究 |
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| 作者姓名： | 穆文彬 李义豪 李传哲 刘佳 程双虎 赵娜娜 |
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| 作者单位： | 1. 中国水利水电科学研究院流域与水循环模拟与调控国家重点实验室，北京100038; 华北水利水电大学黄河科学研究院，郑州450045;2. 中国水利水电科学研究院流域与水循环模拟与调控国家重点实验室，北京100038; 东华大学环境科学与工程学院，上海200051;3. 中国水利水电科学研究院流域与水循环模拟与调控国家重点实验室,北京,100038;4. 河北省水文水资源勘测局,石家庄,050031;5. 中国林业科学研究院湿地研究所北京100091 |
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| 基金项目： | 中国水利水电科学研究院科研专项（1232）；国家自然科学基金项目（51209225;51409270）（National Natural Science Foundation of China（NSFC）（51209225;51409270））；国家国际科技合作专项（2013DFG70990） |
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| 摘 要： | 坡度和前期土壤含水率是降雨产流过程的重要影响因素。为研究华北半干旱地区的降雨产流机制,采用人工模拟降雨的方法,进行了不同坡度(5°、10°和15°)和前期土壤含水率(0.20、0.25和0.30)条件下的降雨产流试验。结果表明:在整个降雨产流过程中,地表径流量随坡度和前期土壤含水率的增加而增大,累积径流量与产流历时呈线性函数关系;土壤入渗率和产流滞时均随前期土壤含水率和坡度的增加而减小,且前期土壤含水率对土壤入渗率和产流滞时的影响较坡度更加明显;Horton模型对降雨入渗关系的拟合结果优于Kostiakov和Philip模型。
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| 关 键 词： | 前期土壤含水率 坡度 降雨产流 土壤入渗率 裸地 |
Rainfall runoff test on bare soil with different slope gradient and soil moisture content |
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| Authors: | MU Wen-bin LI Yi-hao LI Chuan-zhe LIU Ji CHENG Shuang-hu ZHAO Na-na |
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| Affiliation: | 1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China; 3. School of Environmental Science and Engineering Donghua University, Shanghai 200051, China; 4. Hebei Survey Bureau of Hydrology and Water Resources, Shijiazhuang 050031, China; 5. Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China |
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| Abstract: | Antecedent soil moisture content and slope gradient are significant influential factors for rainfall‐runoff (RR) process . In order to study the RR mechanism of semi‐arid region in the North China ,artificial RR simulation test was carried out in the condition of different slope gradient and antecedent soil moisture content .According to the results :(1) In the whole RR process ,the overland flow increased with the increase of antecedent soil moisture and slope ,and the relationship between cumu‐lative runoff and rainfall duration complied with a linear function .(2) Soil infiltration rate and runoff lag time decreased with the increase of antecedent soil moisture content and slope ,and the influence of antecedent soil moisture on soil infiltration rate and runoff lag time was more obvious than that of slope .(3)Horton model was better than Kostiakov and Philip model in fitting the relationship between rainfall and infiltration . |
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| Keywords: | antecedent soil moisture content slope gradient rainfall-runoff soil infiltration rate bare soil |
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