| RUNOFF GENERATION CHARACTERISTICS IN TYPICAL EROSION REGIONS ON THE LOESS PLATEAU |
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| 作者姓名： | Li CHEN Qingquan LIU and Jiachun LI .. Division of Engineering Sciences Institute of Mechanics Chinese Academy of Sciences Beijing China E-mail: qqliu@mail.imech.ac.cn |
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| 作者单位： | Li CHEN，Qingquan LIU，and Jiachun LI 1.2.3 Division of Engineering Sciences，Institute of Mechanics，Chinese Academy of Sciences，Beijing 100080，China E-mail: qqliu@mail.imech.ac.cn |
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| 摘 要： | 1 mTRODUCT1ONThe Loess Plateau in the central and westem China with an area of 430,(X)0 lQn2 is well known for itsancient cultUre and serious soil and water loss. About 287,(X)0 km2 of area in this region has an annualerosion be greatC than 1(XX) tlkIn2. The eroded soil totally amounts to more than 2.2 X l0' tons, amongwhich about l.6X 10' tons, on average, is delivered into the Yellow kiver mdeng the river one of thehighest sediment-laden rivers in the word. The serious soil erosion …
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RUNOFF GENERATION CHARACTERISTICS IN TYPICAL EROSION REGIONS ON THE LOESS PLATEAU |
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| Li CHEN,Qingquan LIU,and Jiachun LI .. Division of Engineering Sciences,Institute of Mechanics,Chinese Academy of Sciences,Beijing ,China E-mail: qqliu@mail.imech.ac.cn.RUNOFF GENERATION CHARACTERISTICS IN TYPICAL EROSION REGIONS ON THE LOESS PLATEAU[J].International Journal of Sediment Research,2001,16(4). |
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| Authors: | Li CHEN Qingquan LIU Jiachun LI |
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| Abstract: | This paper presents a process-based model for runoff generation on slopes. One dimensional kinematic wave theory combined with the revised Green-Ampt infiltration formula is applied in the model. According to the characteristics of soil and rainfall in the Loess Plateau area, six types of storm are defined, and among them three typical erosion zones that have different values of representative parameters are chosen to simulate the runoff generation processes. The primary hydraulic characteristics of the runoff generation, such as unit discharge, runoff depth, flow velocity, shear stress and ratio of runoff generation, are obtained and analyzed. The results demonstrate that the different erosion characteristics are related to different runoff generation zones. |
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| Keywords: | Infiltration Runoff generation Soil erosion Loess Plateau |
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