泥沙颗粒分析法在岷江下游河段河床质分析中的应用  

Sediment Grain Analysis Methods Applied to Studying Bed Material in the Downstream of Minjiang River

作　　者：李健[1] 杨文俊[1] 金中武[1] 

机构地区：[1]长江科学院河流研究所,武汉430010

出　　处：《长江科学院院报》2014年第4期1-5,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金面上项目(51079008)

摘　　要：泥沙颗粒分析是泥沙研究中的基础工作,可为河流演变、水生态环境及地质地貌等研究提供基础信息。对当前的泥沙颗粒分析方法进行了分类,并评价了各种分析方法的优缺点及适用范围,归纳总结了各种方法的计算原理。应用泥沙颗粒分析工具GRADSTAT对岷江河床采样的泥沙样品进行了计算分析,结果表明:岷江河床质分选很差,沿程粒径减小,由于上游水库拦截泥沙作用,下游的河床质中细颗粒成分较多。Sediment grain analysis( SGA),as the fundamental work of sediment research,could provide information for river evolution,aquatic ecological environment and geological landforms. In this research,current SGA methods are categorized,the advantages and disadvantages as well as the application scope of each method are assessed,and the calculation principle of each method are summarized. An analysis tool called GRADSTAT is applied to the analysis of bed material sediment samples collected from Minjiang River,and the results show that the sorting of bed material in Minjiang River is inferior,the grain size of sediment decreases along the river,and there are many fine-grained sediments in the downstream bed material because of the interception by upstream reservoirs.

关 键 词：泥沙颗粒分析 GRADSTAT 河床质 岷江 

分 类 号：P333.4[天文地球—水文科学] TV14[水利工程—水文学及水资源]