| 黄土高原小流域泥沙来源的复合指纹识别法分析 |
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| 引用本文： | 杨明义,徐龙江.黄土高原小流域泥沙来源的复合指纹识别法分析[J].水土保持学报,2010,24(2). |
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| 作者姓名： | 杨明义 徐龙江 |
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| 作者单位： | 西北农林科技大学/中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 教育部“新世纪优秀人才”支持计划项目; 国家“973”计划项目(2007CB407201) |
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| 摘 要： | 流域泥沙来源分析对流域治理及水土保持措施评价有重要意义。通过在陕北选定的汇水区内采集的主沟道沟壁、坡地果园、坡耕地及支沟道土壤样品中17种物质的分析,利用Kruskal-WallisH-test和多元判别分析,筛选出土壤全N,低频磁化率χIf、Cu、137Cs和226Ra组成复合指纹识别因子,利用混合模型,对一次洪水携带的泥沙来自4种源地的贡献比进行了动态分析,结果表明:洪水发生时间段内,主沟道发生了重力侵蚀,对今后定量化研究黄土区的重力侵蚀提供了手段。通过加权平均,总体上,本次洪水携带的总泥沙有33.7%来自主沟道,60.0%来自坡地果园,3.0%来自小块的坡耕地以及3.3%来自支沟道。混合模型拟合优度检测值为0.91,证明在黄土高原可以应用复合指纹识别方法研究洪水泥沙来源,并且能对重力侵蚀产沙进行定量分析。
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| 关 键 词： | 泥沙来源 复合指纹识别 黄土高原 小流域 |
Fingerprinting Suspended Sediment Sources in A Small Catchment on the Loess Plateau |
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| YANG Ming-yi,XU Long-jiang.Fingerprinting Suspended Sediment Sources in A Small Catchment on the Loess Plateau[J].Journal of Soil and Water Conservation,2010,24(2). |
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| Authors: | YANG Ming-yi XU Long-jiang |
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| Institution: | YANG Ming-yi,XU Long-jiang (State Key Laboratory of Soil Erosion , Dryl, Farming on the Loess Plateau,Institute of Soil , Water Conservation,Chinese Academy of Science , Ministry of Water Resources/Northwest A&F University,Yangling,Shaanxi 712100) |
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| Abstract: | Information on flood suspended sediment sources is an important requirement for the catchment control and the assessment of soil conservation measurements.The soil samples were collected on the surface of the sloping orchard and cultivated slopes,and the gully walls on the main gully and sub-gullies in a small catchment in the north of Shaanxi area.The concentration values of 17 fingerprint properties were analyzed using Kruskal-Wallis H-test and multivariate discriminant function analysis,the results showe... |
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| Keywords: | sediment source fingerprinting Loess Plateau small catchment |
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