流量对河势及河型变化影响的试验研究  

Experimental study on influence of discharge ontransformation of river patterns

作　　者：董占地[1] 吉祖稳[1] 胡海华[1] 王党伟[1] 

机构地区：[1]中国水利水电科学研究院,北京100048

出　　处：《水利水运工程学报》2011年第4期46-51,共6页Hydro-Science and Engineering

基　　金：水利部公益性行业科研专项经费(200701003);中国水利水电科学研究院科研专项经费(泥集1130)

摘　　要：以长江上荆江陈家湾—郝穴河段为典型河段,通过概化实体模型试验,研究流量大小及过程对大型水利枢纽工程下游河道河势及河型变化的影响.试验结果表明,在其他边界条件一样的情况下,流量越大,试验河段的冲淤、断面形态及平面形态等特征值的变化幅度也越大,但在恒定流量的作用下,单纯增大流量并不能引起本次试验河段河型的转化,而不同的非恒定流量过程可能会形成不同的河道形态,在适当的条件下,合适的非恒定流量过程会导致河型发生转化.A physical model of Chenjiawan-Haoxue reach in the Yangtse River is established, by which experiments are carried out for researching the influence of discharge on river pattern transformations at the lower reaches of water conservancy projects. The results show that deformation of the cross section and the plane of the river are in direct proportion to the amount of discharge, and different flow processes can lead to different formations of the river, so unsteady flow may engender the transformation of river patterns under some particular conditions, but it won＇t occur if flow is steady regardless of water discharge.

关 键 词：上荆江 流量 概化 实体模型 河势 河型 

分 类 号：TV143[水利工程—水力学及河流动力学]