| 不同下垫面裸露开挖边坡水土流失规律试验研究——以南水北调中线干线工程石家庄段为例 |
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| 引用本文： | 李亚龙,张平仓,王一峰,丁文峰.不同下垫面裸露开挖边坡水土流失规律试验研究——以南水北调中线干线工程石家庄段为例[J].人民长江,2011,42(17). |
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| 作者姓名： | 李亚龙 张平仓 王一峰 丁文峰 |
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| 作者单位： | 长江科学院水土保持研究所,湖北武汉,430010 |
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| 基金项目： | 水利部公益性行业科研专项经费项目“生产建设项目水土流失测算共性技术研究”(201001036)资助 |
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| 摘 要： | 通过野外实地调查,选取南水北调中线干线工程石家庄段不同下垫面的开挖边坡为对象,采用原位人工降雨模拟试验,研究了不同下垫面开挖边坡在4种不同降雨强度下的产流产沙特征,揭示了土质边坡和岩土边坡水土流失量与降雨之间的关系。结果表明:粉质土壤边坡、岩土边坡和沙质土壤边坡产流量随雨强增大而增大,黏质土壤边坡产流量随雨强增大而减小。小雨强(0.43 mm/m in)时黏质土壤边坡产沙量最大,随着雨强增大,岩土边坡产沙量均显著高于其他下垫面边坡。黏质土壤边坡产沙量随雨强增大而增大,其余3种下垫面边坡产沙量随雨强增大而减小。不同的下垫面,在相同雨强下的产流时间是不同的,且边坡产流产沙规律亦不同。可见,裸露开挖边坡水土流失是受降雨强度、降雨历时和下垫面共同作用的结果。研究结果为生产建设项目水土流失防治提供了理论依据和技术支撑。
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| 关 键 词： | 下垫面 开挖边坡 水土流失 人工降雨试验 |
Laws of soil and water loss from exposed excavated slope under different underlying conditions:a case study in Shijiazhuang section of middle route project of S-N Water Diversion |
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| LI Yalong,ZHANG Pingcang,WANG Yifeng,DING Wenfeng.Laws of soil and water loss from exposed excavated slope under different underlying conditions:a case study in Shijiazhuang section of middle route project of S-N Water Diversion[J].Yangtze River,2011,42(17). |
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| Authors: | LI Yalong ZHANG Pingcang WANG Yifeng DING Wenfeng |
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| Affiliation: | LI Yalong,ZHANG Pingcang,WANG Yifeng,DING Wenfeng(Department of Soil and Water Conservation,Changjiang River Scientific Research Institute,Wuhan 430010,China) |
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| Abstract: | Through field investigation,selecting excavated slope under different underlying conditions in Shijiazhuang section of middle route project of South-to-North Water Diversion as research object,the runoff and sediment characteristics of the slopes under 4 different underlying conditions was studied by artificial rain simulation experiments,and the relation between soil and water loss and precipitation for rock slope and soil slopes was unveiled.The results showed that the runoff of silt loam slope,rock and s... |
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| Keywords: | underlying conditions excavated slope soil and water loss artificial rain simulation experiments |
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