基于河流动力学的黄河“粗泥沙”的界定  

Definition of "Coarse Sand" of the Yellow River Based on River Dynamics

作　　者：张红武[1] 张俊华[2] 吴腾[1] 

机构地区：[1]清华大学黄河研究中心,北京100084 [2]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24-25,27,共3页Yellow River

基　　金：国家自然科学基金委员会、水利部黄河水利委员会黄河联合研究基金资助项目(40201008);黄河水利委员会水保基金资助项目(2000-06)

摘　　要：运用河流动力学原理,从描述泥沙运动特性和异质粒子与紊流跟随性2个角度,分别对黄河"粗泥沙"的理论界定进行了探讨。结果表明,黄土高原进入黄河下游粒径大于或等于0.075 mm的泥沙多难以被水流直接输送入海,粒径小于0.075 mm的颗粒则易在水流中悬浮入海,因此,黄河中游划分粗细沙的临界粒径应该为0.075 mm。It approaches to the definition of 'coarse sand 'of the Yellow River from the two angles of sediment movement characteristic description and heterogeneous particle and turbulent follow-up respectively by using the principle of river dynamics.The outcomes show that the sediment particle size ≥ 0.075 mm from the Loess Plateau is difficult to be flowed into the sea directly,while the particle size < 0.075 mm is easily suspended on water and flowed into the sea.Thus,the division of critical particle size of coarse sand and fine sediment of the middle Yellow River should be 0.075 mm.

关 键 词：河流动力学 紊流跟随性 异质粒子 临界粒径 粗泥沙 黄河 

分 类 号：TV143[水利工程—水力学及河流动力学] TV882.1