A DVGE service system for risk assessment of dam-break in barrier lake

2012 ◽  
Author(s):  
J. Zhu ◽  
H. Qi ◽  
Y.G. Cao ◽  
Y. Hu
Keyword(s):  
Risk Assessment ◽  
Service System ◽  
Dam Break ◽  
Barrier Lake

scholarly journals Numerical Simulation and Risk Assessment of Cascade Reservoir Dam-Break

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1730 ◽  
Author(s):  
Liangming Hu ◽  
Xu Yang ◽  
Qian Li ◽  
Shuyu Li
Keyword(s):  
Risk Assessment ◽  
Flood Control ◽  
Engineering Application ◽  
Dam Break ◽  
Flood Routing ◽  
Embankment Dam ◽  
Cascade Reservoirs ◽  
Whole Process ◽  
Barrier Lake ◽  
Outflow Rate

Despite the fact that cascade reservoirs are built in a large number of river basins nowadays, there is still an absence of studies on sequential embankment dam-break in cascade reservoirs. Therefore, numerical simulations and risk analyses of cascade reservoir dam-break are of practical engineering significance. In this study, by means of contacting the hydraulic features of upstream and downstream reservoirs with flood routing simulation (FRS) and flood-regulating calculation (FRC), a numerical model for the whole process of cascade reservoir breaching simulation (CRBS) is established based on a single-embankment dam-break model (Dam Breach Analysis—China Institute of Water Resources and Hydropower Research (DB-IWHR)). In a case study of a fundamental cascade reservoir system, in the upstream Tangjiashan barrier lake and the downstream reservoir II, the whole process of cascade reservoir dam-break is simulated and predicted under working schemes of different discharge capacities, and the risk of cascading breaching was also evaluated through CRBS. The results show that, in the dam-break of Tangjiashan barrier lake, the calculated values of the peak outflow rate are about 10% more than the recorded data, which are in an acceptable range. In the simulation of flood routing, the dam-break flood arrived at the downstream reservoir after 3 h. According to the predicted results of flood-regulating calculations and the dam-break simulation in the downstream reservoir, the risk of sequential dam-break can be effectively reduced by setting early warnings to decrease reservoir storage in advance and adding a second discharge tunnel to increase the discharge capacity. Alongside the simulation of flood routing and flood regulation, the whole process of cascade dam-break was completely simulated and the results of CRBS tend to be more reasonable; CRBS shows the great value of engineering application in the risk assessment and flood control of cascade reservoirs as an universal numerical prediction model.

Interactive Virtual Globe Service System Based on OsgEarth

2013 ◽  
Vol 340 ◽  
pp. 680-684 ◽  
Author(s):  
Jun Zhu ◽  
Jin Hong Wang
Keyword(s):  
Spatial Data ◽  
Service System ◽  
Simulation Analysis ◽  
Google Earth ◽  
Flood Routing ◽  
Geographic Visualization ◽  
Virtual Globe ◽  
Barrier Lake ◽  
Interactive Operation ◽  
Online Tools

These online tools, led by the Google Earth virtual globe, are changing the way we interact with spatial data. This paper focused on how to develop a virtual globe-based interactive service system for risk assessment of dam-break in Barrier Lake. Unlike existing work, virtual globe technology was used as a medium for geographic visualization and analysis. Moreover, GIS spatial analysis and real-time interactive operation with the service system will also be implemented to support the simulation analysis of dab-break flood routing. The experimental results show that the scheme developed in this paper is efficient and feasible.

scholarly journals Study on Risk Assessment and Early Warning of Flood-Affected Areas when a Dam Break Occurs in a Mountain River

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1369 ◽  
Author(s):  
Qiang Fan ◽  
Zhong Tian ◽  
Wei Wang
Keyword(s):  
Risk Assessment ◽  
Early Warning ◽  
Assessment Method ◽  
Research Literature ◽  
Dam Break ◽  
Hydropower Station ◽  
Risk Level ◽  
Mountain River ◽  
Flood Level ◽  
Study Results

Under the influence of extreme weather conditions or other unfavorable factors, if a dam break occurs in a mountain river, it will cause a great number of casualties and property losses in the affected downstream areas. Usually, early warning of the affected areas downstream of the dam depends mainly on qualitative evaluation and cannot be quantitatively evaluated. Based on the authors’ calculation of floods for many years, this study presents a quantitative assessment method for flood risk. The Ertan Hydropower Station in Southwest China and the flood-affected areas were chosen as the object of this study. Based on field surveys, research literature data, and the authors’ calculations, the basic data of the Ertan Hydropower Station and the calculation results of the dam break were obtained, and 35 representative flood-affected areas were selected to study risk assessment and early warning. The fuzzy analytic hierarchy process (FAHP) was used to build a mathematical model for quantitative analysis. The population, flood arrival time, flood level, evacuation time, and local GDP (Gross Domestic Product) were selected as five typical evaluation factors. Finally, this study calculated and counted the risk level of 35 representative flood-affected areas, and the study results were applied to Quxue and Guanmaozhou Hydropower Station.

Risk Assessment Regarding Tailings Dam Break

2012 ◽  
Vol 433-440 ◽  
pp. 1864-1868
Author(s):  
Yong Bao Shu ◽  
Pei Liang Li ◽  
Zhong Xue Li
Keyword(s):  
Risk Assessment ◽  
Potential Risk ◽  
Quantitative Assessment ◽  
Social Economy ◽  
Dam Break ◽  
Space Diversity ◽  
Tailings Dam ◽  
Assessment Approach ◽  
Tailings Reservoir

An assessment approach in regard to tailings dam break would be analyzed and established in aspects of life, property and environment & resources loss in the essay. Tailings bam break hits local social economy varying with region as a result of particular and specialized space diversity. With the simple and practicable approach, it is quite reasonable to accomplish quantitative assessment of risk as well as review controlling priority to potential risk arising from tailings reservoir.

The Dam Break Problem For A Hyperconcentrated Suspension

2000 ◽  
Vol 10 (5) ◽  
pp. 224-230 ◽  
Author(s):  
Blaise Nsom
Keyword(s):  
Risk Assessment ◽  
Debris Flows ◽  
Equations Of Motion ◽  
Dam Break ◽  
Solid Particles ◽  
Environmental Engineering ◽  
Theoretical Studies ◽  
Shallow Water Approximation ◽  
Experimental And Theoretical Studies ◽  
Theoretical Results

Abstract A rheological approach of muddy debris flows is presented for environmental engineering and risk assessment purposes. The debris flow is viewed as a hyperconcentrated suspension of non brownian solid particles. Experimental and theoretical studies are presented versus the concentration. The experimental work generally consists in generating the flow of well characterized suspensions by a dam break. Then, the time evolution of the front as well as that of the stage at given position are accurately determined. On the theoretical framework, the viscous equations of motion of the suspension are written with the shallow water approximation, and the asymptotic solution in a non dimensional form is derived. Finally, the experimental and the theoretical results are successfully compared and the limits of this rheological approach is fixed.

Draining Tangjiashan Barrier Lake after Wenchuan Earthquake and the flood propagation after the dam break

2009 ◽  
Vol 52 (4) ◽  
pp. 801-809 ◽  
Author(s):  
Ning Liu ◽  
JianXin Zhang ◽  
Wei Lin ◽  
WuYi Cheng ◽  
ZuYu Chen
Keyword(s):  
Wenchuan Earthquake ◽  
Dam Break ◽  
Barrier Lake
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