Flow and Sedimentation Characteristics on Typical Tributary in Xiaolangdi Reservoir on Yellow River

2014 ◽  
Vol 641-642 ◽  
pp. 175-178 ◽  
Author(s):  
Tao Li ◽  
Jun Hua Zhang ◽  
Guo Ming Gao ◽  
Ting Wang
Keyword(s):  
Storage Capacity ◽  
Yellow River ◽  
Longitudinal Profile ◽  
The Yellow River ◽  
Critical Position ◽  
Xiaolangdi Reservoir ◽  
Multipurpose Dam

Located at the exit of the last gorge of the middle reaches of the Yellow River, the Xiaolangdi Multipurpose Dam Project occupies a critical position in controlling both runoff and sediment of the River. typical tributary Zhenshui is the biggest tributary of Xiaolangdi Reservoir and its original storage capacity is 1.767 billion m3.This paper shows the process of the longitudinal profile of tributary Zhenshui,which faces the serious sediment bar growth at its mouth. Discussion is processed to show the possibility.

scholarly journals Study on Ecological Scheduling of the Xiaolangdi Reservoir Based on the Ecological Needs of Estuarine Fishes

2018 ◽  
Vol 246 ◽  
pp. 01045
Author(s):  
Shimin Tian ◽  
Yi Zhao ◽  
Yuanjian Wang ◽  
Enhui Jiang ◽  
Shoubing Yu
Keyword(s):  
Yellow River ◽  
River Estuary ◽  
The Yellow River ◽  
Large Reservoir ◽  
Lower Yellow River ◽  
The Lower Yellow River ◽  
Estuarine Fishes ◽  
Water Demands ◽  
Xiaolangdi Reservoir ◽  
Water Amount

The total water amount into the Yellow River estuary is significantly reduced with the construction of a series of reservoirs in the Yellow River, which has a lot of adversely effects on the fishes and fishery resources in the estuary. This research analyzes the impacts of the reservoirs on the runoff and discharge in the Lower Yellow River and the estuary, and pays more attention to the influences of the reduction of water amount on the estuarine ecology and fishes. As a large reservoir nearest to the estuary in the Lower Yellow River, the operation of Xiaolangdi Reservoir plays an important role on the ecological restoration of the lower reaches of the Yellow River and the estuary. Two ecological operation schemes are proposed based on the ecological demands of the estuarine fishes and the actual operation of the Xiaolangdi Reservoir in recent years. One scheme is proposed only on the basis of the estuarine ecological water demands and another scheme takes consideration of ecological water demands and the actual status of the water resources in the Lower Yellow River synthetically. Finally, the feasibility of the two schemes are analyzed according to the actual situation of water storage of the reservoirs in the Yellow River in 2017.

scholarly journals Study on the evolution law of density current in the Xiaolangdi Reservoir before the flood in 2018

2018 ◽  
Vol 246 ◽  
pp. 01050
Author(s):  
Xinjie Li ◽  
Yuanjian Wang ◽  
Shaojun Qu ◽  
Ting Wang ◽  
Kunpeng Li
Keyword(s):  
Flow Velocity ◽  
Water Level ◽  
Yellow River ◽  
The Yellow River ◽  
Density Current ◽  
Sediment Characteristics ◽  
Sediment Thickness ◽  
Evolution Law ◽  
Research Results ◽  
Xiaolangdi Reservoir

Sediment problems affect the operation life and comprehensive benefits of a reservoir. In response to the floods in the middle and upper reaches of the Yellow River, the Xiaolangdi Reservoir is subjected to preventative pre-discharge scheduling. Through a prototypical observation of the density current plunging zone of the Xiaolangdi Reservoir in 2018, we collected prototypical data of the water level, water-sediment characteristics, sediment thickness, thalweg points, and flow velocity, and analyzed the pre-dam distribution of density current and scouring-sedimentation characteristics during the flood dispatching period of the Xiaolangdi Reservoir. The research results promoted the understanding of the movement law of the density current of the Xiaolangdi Reservoir and the development of efficient sediment drainage technology for reservoirs.

Analysis and Prediction for Xiaolangdi Reservoir Sand Blocking Operation Period and Water Level of the Lower Yellow River

2011 ◽  
Vol 71-78 ◽  
pp. 1318-1323 ◽  
Author(s):  
Qing An Li ◽  
Han Dong Liu ◽  
Yu Kun Zhao
Keyword(s):  
Water Level ◽  
Flood Control ◽  
Yellow River ◽  
River Channel ◽  
The Yellow River ◽  
Deposition Condition ◽  
Reservoir Water ◽  
Specific Flow ◽  
Operation Period ◽  
Xiaolangdi Reservoir

Xiaolangdi Reservoir undertakes 90% of the Yellow River runoff and 100% of sediment discharge. To ensure the long-term utilization of Xiaolangdi reservoir is the key to prevent the flood in the lower reaches of the Yellow River. Take Luokou Hydrologic Station located in the lower reaches of the Yellow River as an example, conduct an analysis from the aspects of sediment retaining of Xiaolangdi Reservoir, scouring and deposition condition of river channel in the lower reaches of the Yellow River, water level performance for years of different flow of ten times’ water-sediment regulation, predict on the sand blocking operation period of Xiaolangdi Reservoir, water level of specific flow of river channel in the lower reaches of the Yellow River and scouring and deposition condition of river channel, which has played a reference role for the flood control in the lower reaches of the Yellow River.

Controls of boundary conditions on accelerating turbidity currents in a reservoir: Case study of Xiaolangdi Reservoir on the Yellow River, China

2020 ◽  
Author(s):  
Hongbo Ma ◽  
Gary Parker ◽  
Jeffrey Nittrouer ◽  
Brandon McElory ◽  
Yuanjian Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Boundary Conditions ◽  
Yellow River ◽  
The Yellow River ◽  
Turbidity Currents ◽  
Bed Morphology ◽  
Long Run ◽  
Sea Bed ◽  
Theoretical Criterion ◽  
Xiaolangdi Reservoir

<p>Turbidity currents are a major way to transport sediment along reservoir, lake and sea beds. They are not fully understood yet due to the difficulty of accessibility. Theoretical criteria have been established for the conditions that generate accelerating turbidity currents, which can produce strong erosion of channel beds, transmit over long distances and thus have important significance for reservoir and sea bed morphology. However, the current theoretical criterion only utilizes local factors of hydraulic, morphology and grain size, which do not necessarily depend on the up- and down- stream boundary conditions. Here, we conducted field surveys on turbidity currents and bed morphology of the Xiaolangdi reservoir on the Yellow River, China. The survey results show clear evidence of accelerating turbidity currents. We identify two types of accelerating turbidity currents: one locates closely to the upstream plunging point where fluvial sediment-laden flow collapses to a stratified turbidity current, concentrating momentum and producing acceleration locally, and the other is located downstream and shows dependence on the enhancement of local slope and potentially on downstream boundary (flushing condition at flow outlets of the dam). So both ends of the boundaries may work together to produce long run-out turbidity currents that transmit through the entire reservoir.  Although preliminary, our dataset indicates that the conditions for accelerating turbidity currents are not only controlled by local morphology and grain size, but also by both upstream and downstream conditions. A comprehensive understanding of the boundary conditions so as to determine conditions for the generation of accelerating turbidity currents will help enhance the sustainability of the dam and reservoir system.</p>

Sign in / Sign up

Export Citation Format

Share Document