黄土高原淤地坝泥沙沉积的空间差异研究  

Study on Spatial Difference of Sediment Deposition of Warping Dams of the Loess Plateau

作　　者：时明立[1] 史学建[1] 付凌[1] 韩慧霞[1] 黄静[1] 孙维营[1] 杨红新[1] 李莉[1] 

机构地区：[1]黄河水利科学研究院,河南郑州450003

出　　处：《人民黄河》2008年第3期64-65,85,共3页Yellow River

基　　金：“十一五”国家科技支撑计划项目(2006BAB06B01)

摘　　要：为探索淤地坝泥沙淤积规律,通过野外调查、典型坝取样并对样品进行颗粒级配分析,对黄土高原淤地坝泥沙沉积的空间差异进行了研究。结果表明:垂直剖面上淤积物粗细相间分布,具有一定层理;在水平方向上,坝前淤积物中粗泥沙明显减少;无放水工程的淤地坝坝前黏土层厚度较大,有放水工程时控制面积大的淤地坝淤积物较细;上下游淤地坝表现为上游拦粗下游淤细。In order to explore the sedimentation law of warping dams,the paper studies the spatial difference of sediment deposition of warping dams in the Loess Plateau through field survey,typical sampling of warping dams and grain size analysis.The outcomes show that the deposit on vertical section distributes coarse alternating with fine and with a certain lamination;on horizontal,the coarse sand of deposit in front of dam is remarkably reduced;the thickness of clay layer in front of a warping dam without dewatering works is greater,while the deposit of a warping dam with dewatering works and large controlled area is finer and;the warping dam on upper stream retains coarse sand and downstream fine sediment.

关 键 词：淤地坝 淤积物 粗泥沙 粒径 黄土高原 

分 类 号：S157.2[农业科学—土壤学]