期刊论文详细信息
Water Science and Engineering
Experimental study on evolution of bed structures of natural mountain rivers
Huai-xiang Liu1  Zhao-yin Wang2  Guo-an Yu2  Kang Zhang2 
[1] State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, P. R. China;State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, P. R. China;
关键词: bed structures;    channel configuration;    channel incision;    slope;    resistance;   
DOI  :  10.3882/j.issn.1674-2370.2011.02.007
来源: DOAJ
【 摘 要 】

Bed structures in many mountain rivers provide additional resistance to the flow. A field experiment was conducted on debris flow deposits in the valley of the Jiangjiagou Ravine, a tributary of the Yangtze River in southwestern China, to study the evolution and distribution of bed structures and their relationship with environmental conditions. Water and sediment from the Jiangjiagou main stream were diverted into the experimental channel. Several hydrological schemes were adopted to scour the channel until equilibrium was reached. During this process the evolutions of bed structures and channel configuration were investigated. The results indicate that stronger bed structures mean greater stream power consumption, greater resistance, and greater slope in a certain section when rivers are in dynamic equilibrium. Thus, to some extent the longitudinal profiles of channels can be determined by the distribution of bed structures. In natural cases, the strength and evolution of bed structures are under the influence of environmental conditions such as discharge and bed-load transportation rate. That is, given the same conditions, the same bed structure distribution and longitudinal profile can be predicted.

【 授权许可】

Unknown   

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