Numerical simulation of dam-break flow and bed change considering the vegetation effects

He, Zhiguo; Wu, Ting; Weng, Hong; Hu, Peng; Wu, Gangfeng

doi:10.1016/j.ijsrc.2015.04.004

Cited by 31 publications

(13 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The laboratory experiment of dam break flow over triangular obstacle, which was performed in the Concerted Action on Dam-Break Modeling (CADAM) project [44] and had been widely used as an benchmark test by many researchers [14,21,36,45] , is considered to validate the current model's ability to simulate dam break flow with wet/dry front over fixed irregular bed. Figure 6 presents the configuration of the experiment, in which the flume is 38 m long and the dam is located 15.5 m away from the upstream end.…”

Section: Simulation Of Dam Break Flow Over Triangular Obstaclementioning

confidence: 99%

“…In this section, the benchmark experiment of partial dam-break flow over mobile bed, which was also performed at UCL-Belgium [16] and has been used to test morphological models by many researchers [17,21,27,35,50], is adopted here to further verify the ability of the model to simulate bed evolution of a mobile bed caused by partial dam-break flow. As shown in Figure 13, the flume is 3.6 m wide and about 36 m long.…”

Section: Partial Dam-break Flow Over Mobile Bedmentioning

confidence: 99%

“…In recent years, some numerical models have been proposed in the literature to simulate dam break flows on movable beds [7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In order to improve the accuracy of simulating dam-break flow-induced sediment transport, the numerical models are evolving from equilibrium description to non-equilibrium description of sediment transport [21,22]. Equilibrium sediment transport models based on the assumption that the bed load or the total load are instantaneously adapted to equilibrium state have been widely used for morphodynamic problems [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al [15] further shows that the central-upwind scheme is less expensive than other popular Riemann solvers while still capable of tracking wet/dry fronts accurately. The central-upwind schemes are widely used in numerical models to simulate dam break flow over fixed [6,30] and movable bed [15,21,29,32], and satisfactory simulation results are achieved. However, most of these existing models are based on uniform Cartesian grids or triangular mesh, and limited studies are dedicated to non-uniform rectangular or quadtree grids.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Non-Equilibrium Sediment Transport Model for Dam Break Flow over Moveable Bed Based on Non-Uniform Rectangular Mesh

Yang

Zhang

et al. 2018

Water

Self Cite

View full text Add to dashboard Cite

The use of multiple-level non-uniform rectangular mesh in coupled flow and sediment transport modeling is preferred to achieve high accuracy in important region without increasing computational cost greatly. Here, a robust coupled hydrodynamic and non-equilibrium sediment transport model is developed on non-uniform rectangular mesh to simulate dam break flow over movable beds. The enhanced shallow water and sediment transport equations are adopted to consider the mass and momentum exchange between the flow phase and sediment phase. The flux at the interface is calculated by the positivity preserving central upwind scheme, which belongs to Godunov-type Riemann-problem-solver-free central schemes and is less expensive than other popular Riemann solvers while still capable of tracking wet/dry fronts accurately. The nonnegative water depth reconstruction method is used to achieve second-order accuracy in space. The model was first verified against two laboratory experiments of dam break flow over irregular fixed bed. Then the quantitative performance of the model was further investigated by comparing the computational results with measurement data of dam break flow over movable bed. The good agreements between the measurements and the numerical simulations are found for the flow depth, velocity and bed changes.

show abstract

Section: Simulation Of Dam Break Flow Over Triangular Obstaclementioning

confidence: 99%

Section: Partial Dam-break Flow Over Mobile Bedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Non-Equilibrium Sediment Transport Model for Dam Break Flow over Moveable Bed Based on Non-Uniform Rectangular Mesh

Yang

Zhang

et al. 2018

Water

Self Cite

View full text Add to dashboard Cite

show abstract

“…The experimental results were compared to those obtained from the numerical simulation. He et al (2017) investigated a depth-averaged 2D model for dam-break flows over mobile and vegetated beds. Laboratory results were used to validate the numerical studies.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effect of vegetation on dam break flood waves

Oguzhan

Aksoy

2020

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

Dams have an important role in the industrial development of countries. Irrespective of the reason for dam break, the flood can cause devastating disasters with loss of life and property especially in densely populated areas. In this study, the effects of the vegetation on the flood wave propagation in case of dam break were investigated experimentally by using the distorted physical model of Ürkmez Dam. The horizontal and vertical scales of the distorted physical model are 1/150 and 1/30, respectively. The dam break scenarios were achieved by means of a gate of rectangular and triangular shape. The results obtained from experiments performed with vegetation were compared and interpreted with those obtained from experiments at which the vegetation configuration was absent. The analysis of the experimental data showed that the presence of vegetation causes a significant decrease in water depths as the flood wave propagates to the downstream and greatly reduces its impact on the settlements. It is also revealed that dam break shape plays an important role in temporal variation of flood wave.

show abstract

Dam break flow through rigid-emergent vegetation

Mahmoud,

Uchida

2024

Exp Fluids

View full text Add to dashboard Cite

Dam failures pose a significant threat to life and property. This study investigates the potential of rigid emergent vegetation to attenuate dam break waves, reducing their destructive impact. Experiments explored the effect of varying vegetation field lengths on wave propagation. Wooden cylinders with consistent diameter (1.0 cm) and density (0.067) simulated the rigid vegetation in a straight, flat rectangular channel. Four different vegetation lengths and three bore conditions for different reservoir and tailwater depths were examined to analyze their influence on dam break wave behavior. The results demonstrate the effectiveness of vegetation in dissipating wave energy, leading to a rapid decrease in wave height and celerity. Interestingly, increasing vegetation length significantly attenuates the wave height downstream of the vegetation zone, while having no significant impact on the reflection wave height upstream of the vegetation. This finding highlights the targeted effectiveness of strategically placed vegetation in shielding downstream areas. The study also clarifies that celerity can be calculated using shallow water equations for both upstream and downstream regions with wave height and tailwater depth. However, within the vegetation, drag forces significantly reduce celerity. A novel equation, derived from wavefront profiles, was proposed and validated to accurately calculate celerity within the vegetation field. These findings provide valuable data for validating numerical models simulating dam break wave interactions with vegetation. Graphical abstract

show abstract

Numerical simulation of dam-break flow and bed change considering the vegetation effects

Cited by 31 publications

References 44 publications

A Non-Equilibrium Sediment Transport Model for Dam Break Flow over Moveable Bed Based on Non-Uniform Rectangular Mesh

A Non-Equilibrium Sediment Transport Model for Dam Break Flow over Moveable Bed Based on Non-Uniform Rectangular Mesh

Experimental investigation of the effect of vegetation on dam break flood waves

Dam break flow through rigid-emergent vegetation

Contact Info

Product

Resources

About