| 考虑重力侵蚀影响的分布式土壤侵蚀模型 |
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| 引用本文： | 金鑫,郝振纯,张金良,王加虎.考虑重力侵蚀影响的分布式土壤侵蚀模型[J].水科学进展,2008,19(2):257-263. |
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| 作者姓名： | 金鑫 郝振纯 张金良 王加虎 |
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| 作者单位： | 1.河海大学水文水资源学院, 江苏, 南京, 210098; |
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| 摘 要： | 黄土高原地区的土壤侵蚀具有水力侵蚀和重力侵蚀相伴发生的特点,在大多数针对黄土高原的侵蚀模型研究中未考虑重力侵蚀的影响,使得模型的模拟精度较差。针对黄土高原的侵蚀特点,采用量化影响重力侵蚀发生的主要因素,确定重力侵蚀发生的具体沟道栅格单元的方法,从而考虑了重力侵蚀对产输沙过程的影响。所建立的分布式土壤侵蚀模型以逐网格汇流的水文模型为基础,采用逐网格侵蚀输沙的模拟方式,能够模拟上方来水来沙对侵蚀输沙的影响。经小理河流域实测资料验证,模型具有一定的计算精度。
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| 关 键 词： | 土壤侵蚀 分布式模型 重力侵蚀 逐网格汇流 输沙 |
| 文章编号： | 1001-6791(2008)02-0257-07 |
| 收稿时间： | 2007-04-19 |
| 修稿时间： | 2007年4月19日 |
Distribute soil erosion model with the effect of gravitational erosion |
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| JIN Xin,HAO Zhen-chun,ZHANG Jin-liang,WANG Jia-hu.Distribute soil erosion model with the effect of gravitational erosion[J].Advances in Water Science,2008,19(2):257-263. |
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| Authors: | JIN Xin HAO Zhen-chun ZHANG Jin-liang WANG Jia-hu |
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| Affiliation: | 1.College of Water Resources and Hydrology, Hohai University, Nanjing 210098, China;2.The Institute of Hydraulic Research of YRCC, Zhengzhou 450003, China;3.The Flood-Control Office of YRCC, Zhengzhou 450003, China |
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| Abstract: | It is a characterist ic that water power erosion and gravitational erosion are coinstantaneous on Loess Plateau.Most of the soil erosion models about Loess Plateau don't simulate gravitational erosion,which is one of causations that simulated re sults aren't satisfactory. Base on the characteristic of the soil erosion on Loess Plateau,in this article,the method quantifying the influence factors of the gravitational erosion is adopted,thus the grids of gully producing the gravitational erosion can be determined,and the effect of the gravitational erosion in the process of sediment yield and transport can be calculated Based on the distributed hydrological model of grid to grid conflux,this article sets up a distributed soil erosion model of grid to grid sediment transport. With the calculation method of grid to grid conflux and sediment transport adopted in this article,the soil erosion model can simulate the effects of runoff and sediment from upslope on downslope erosion process. According to the cal culated result with observed data of Xiaolihe gauge station,the simulated result of the soil erosion model is better |
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