Response of river channel patterns to the spatially varying suspended sediment concentrations

Xu, Jian

doi:10.1007/bf02932438

Cited by 3 publications

(2 citation statements)

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“…Research into the river pattern's formation cause and evolution law of sink reach is of important theoretical and engineering application value. Mainly research methods were used such as the theory and hypothesis method [1,2], the data statistics analysis method [3], the model experimentation method [4,5] and the numerical simulation method [6], etc. The natural model experiment method is effective to research the formation cause of river pattern.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Formation Cause of Sink Reach’s River Pattern of Alluvial River Flowing into the Lake

Chen

Zhang

Hong

et al. 2012

AMM

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The formation cause of sink reach’s river pattern of the alluvial river flowing into the lake was studied by the experiment method. The results showed that: the change of lake level was the important formation condition of the alluvial river’s sink reach. The sediment concentration, the riverbed gradient were the major factors influencing the river pattern’s evolution of the sink reach. When the sediment concentration of upstream river was less, the sink reach was inclined to form a straight river, and with the increase of the sediment concentration, the bifurcated river was the chief river pattern. When the sediment concentration increased to a certain value, the sink reach was inclined to form a wandering river. When the riverbed gradient was less, the sink reach was inclined to form a bifurcated river, and with the increased of the gradient, the wandering river was the main river pattern. The sediment diameter affected channel evolution, but the influence extent was less.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Formation Cause of Sink Reach’s River Pattern of Alluvial River Flowing into the Lake

Chen

Zhang

Hong

et al. 2012

AMM

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“…On the other hand, some meaningful studies on sediment transport capacity of hyperconcentrated flow have also been conducted. Dieter [27] studied the hyperconcentrated flow and the sediment transport at steep slopes; Xu [28][29][30] investigated the erosion processes caused by the hyperconcentrated flow on the Loess Plateau and the grain-size distribution characteristics of suspended sediment in the Yellow River and concluded that "the higher the suspended sediment concentration, the larger the suspended sediment size". Guo [31] and Cao [32] presented some modeling approaches to the hyperconcentrated flows, which were not involved in the systematically theoretical investigation.…”

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confidence: 99%

Sediment transport capacity of hyperconcentrated flow

Shu

Fei

2008

Sci. China Ser. G-Phys. Mech. Astron.

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As one of the most important components of river mechanics, sediment transport capacity of sediment-laden flows has attracted much attention from many researchers working on river mechanics and hydraulic engineering. Based on the time-averaged equation for a turbulent energy equilibrium in solid and liquid two-phase flow, an expression for the efficiency coefficient of suspended load movement was derived for the two-dimensional, steady, uniform, fully-developed turbulent flow. A new structural expression of sediment transport capacity was achieved. Using 115 runs of flume experimental data, which were obtained through two kinds of sediment transport experiments in the state of equilibrium, in combination with the basic rheological and sediment transporting characteristics of hyperconcentrated flow, the main parameters in the structural expression of sediment transport capacity were calibrated, and a new formula of sediment transport capacity for hyperconcentrated flow was developed. A large amount of field data from the Yellow River, Wuding River, and Yangtze River, etc. were adopted to verify the new formula and good agreement was obtained. These results above contribute to an improved theoretical system of river mechanics and a reliable tool for management of rivers carrying high concentration of sediments. hyperconcentrated flow, turbulent energy equilibrium, efficiency coefficient, sediment transport capacityIn the Yellow River, hyperconcentrated flood occurs frequently during the rainy seasons. Both the historical maximum concentration of 1600 kg/m 3 and the mean annual amount for sediment transport of 1600 million tons are the highest values worldwide. According to the statistical results coming from the sedimentation bulletin of Chinese Rivers and the Yellow River 1)2) , and the analysis of the field data from Tongguan, Huayuankou, and Lijin Hydrological Stations along the

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River islands' change and impacting factors in the lower reaches of the Yangtze River based on remote sensing

Gao

Shi

2013

Quaternary International

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Response of river channel patterns to the spatially varying suspended sediment concentrations

Cited by 3 publications

References 1 publication

Experimental Study on Formation Cause of Sink Reach’s River Pattern of Alluvial River Flowing into the Lake

Experimental Study on Formation Cause of Sink Reach’s River Pattern of Alluvial River Flowing into the Lake

Sediment transport capacity of hyperconcentrated flow

River islands' change and impacting factors in the lower reaches of the Yangtze River based on remote sensing

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