| 黄河流域泥沙输移比与流域尺度的关系研究 |
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| 引用本文： | 李秀霞,李天宏.黄河流域泥沙输移比与流域尺度的关系研究[J].泥沙研究,2011(2). |
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| 作者姓名： | 李秀霞 李天宏 |
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| 作者单位： | 1. 环境保护部南京环境科学研究所,江苏南京210042;北京大学环境工程系水沙科学教育部重点实验室,北京100871
2. 北京大学环境工程系水沙科学教育部重点实验室,北京,100871 |
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| 基金项目： | 国家重点基础研究发展计划资助(2007CB407202) |
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| 摘 要： | 泥沙输移比是研究流域泥沙侵蚀与泥沙入河量关系的指标。通过对黄河、延河、杏子河、纸坊沟四级流域尺度上泥沙输移比的研究,分析了黄河流域泥沙输移比与流域尺度的关系。结果表明,杏子河流域泥沙输移比大于1,而黄河、延河、纸坊沟流域的泥沙输移比均小于1。在黄河、延河、杏子河三级流域中,流域泥沙输移比随流域尺度增大呈明显减小趋势,而杏子河与纸坊沟流域的泥沙输移比随流域尺度增大而增大。随着流域尺度增大,被侵蚀的泥沙在输移过程中沉积下来的概率增大,就可能出现泥沙输移比随流域尺度增大而减小的现象,但这种可能性能否转化成现实,还受制于流域其他因素的影响。
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| 关 键 词： | 黄河流域 泥沙输移比 流域尺度 |
Study of relationship between sediment delivery ratio and watershed scale of Yellow River Basin |
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| LI Xiu-xia,LI Tian-hong.Study of relationship between sediment delivery ratio and watershed scale of Yellow River Basin[J].Journal of Sediment Research,2011(2). |
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| Authors: | LI Xiu-xia LI Tian-hong |
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| Affiliation: | LI Xiu-xia1,2,LI Tian-hong2(1.Nanjing Institute of Environmental Sciences,Ministry of Environmental Protection,Nanjing 210042,China,2.Department of Environmental Engineering,Peking University,Key Laboratory of Water and Sediment Sciences,Ministry of Education,Beijing 100871,China) |
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| Abstract: | The sediment delivery ratio is an index about the relationship between the onsite eroded soil and the soil amount reaching a given measuring point.It is helpful to reveal the sediment delivery rules and provides support to soil and water conservation decision.Four grade watersheds of the Yellow,Yanhe,Xingzi and Zhifanggou basins are taken as case studies in this paper.Based on the calculation of the sediment delivery ratios of the four grade watersheds,the relationship between the sediment delivery ratio an... |
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| Keywords: | Yellow River Basin sediment delivery ratio river basin scale |
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