Modeling dam-break flows in channels with 90 degree bend using an alternating-direction implicit based curvilinear hydrodynamic solver

Wood, Amanda L.; Wang, Keh‐Han

doi:10.1016/j.compfluid.2015.03.011

Cited by 13 publications

(1 citation statement)

References 27 publications

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“…This also makes hydrodynamic models more reliable in extreme flood assessment (Felde et al, 2017). 1D or 2D hydrodynamic models have been widely used in practical engineering applications, such as flood event simulation (Quirogaa et al, 2016;Bellos and Tsakiris, 2016;Rashid et al, 2016), flood inundation mapping (Dimitriadis et al, 2016;Saksena et al, 2019;Tamiru and Dinka, 2021), dam break analysis (Wood and Wang, 2015;Bharath et al, 2021), the estimation of flood losses, and flood hazard vulnerability (Zischg et al, 2018). In addition, because hydrodynamic models rely on measured data as model input, many studies have attempted to integrate hydrodynamic models with other models to reduce the uncertainty caused by the measured data.…”

Section: Introductionmentioning

confidence: 99%

Application of multiple methods for reverse flow routing: A case study of Luxi river basin, China

Chen

et al. 2023

Front. Earth Sci.

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Because of the lack of hydrological monitoring facilities and methods in many areas, basic hydrological elements cannot be obtained directly. In that case, the reverse flow routing method is frequently used, which allows for the simulation of hydraulic elements upstream using downstream data, and is of great significance for river and reservoir joint regulation, flood disaster management, flood control evaluation, and flood forecasting. The hydrological and hydrodynamic methods are the two main approaches to reverse flow routing. The hydrological method is mainly realized by constructing a distributed or lumped hydrological model based on rainfall, soil type, terrain slope, and other data. A distributed hydrological model focuses on the physical mechanism of runoff yield and flow concentration, the spatial variability of model input, and the hydraulic connection between different units. The solution of the hydrological method is relatively simple, but it requires a large amount of measured data, which limits the applicability of this method. The other method builds a hydrodynamic model by solving shallow water equations for reverse flow routing. This method has definite physical significance, higher accuracy, and obvious advantages of simple and fast calculations. It can not only simulate one-dimensional but also two-dimensional flood routing processes. In addition, the slope-area method is frequently used for flood reverse routing in many areas in China without relevant hydrological data, and can calculate the peak discharge, maximum water level, flood recurrence interval, and other information by the hydrodynamic formula, along with the cross-section and the measured flood mark water level. Due to the influence of extreme weather, a heavy rainstorm and flood occurred in the Luxi river basin in China on 16 August 2020, resulting in severe flood disasters in this area and causing significant economic losses. Moreover, due to the lack and damage of hydrological monitoring equipment, hydrological information such as flood hydrographs and peak discharges of this flood could not be recorded. To reduce the uncertainty of a single method for reverse flow routing, we integrated and applied the hydrodynamic, hydrological, and slope-area methods to reverse flow routing in the Luxi river basin on 16 August 2020. The simulation accuracy of the three methods was verified in terms of the measured flood mark water level, and the simulation results of the three methods were analyzed and compared. The results are as follows: 1) The hydrological method can better simulate flood hydrographs and durations, especially for flood hydrographs with multiple peaks, and is more applicable than the other two methods. However, the hydrodynamic and slope-area methods have better accuracy in the reverse simulation of flood peaks. Therefore, through the comprehensive comparative analysis of these three methods, flood elements such as flood hydrographs, peak discharges, and durations can be simulated more accurately, and the problem of large errors caused by a single method can be avoided; 2) The simulation results of the hydrodynamic and slope-area methods are similar, and the maximum error of the peak discharge calculated using the two methods is within 10%. According to the simulation results, the peak discharge reached 2,920 m3/s downstream of Luxi river basin, which is a flood having more than 100-year recurrence interval; 3) The simulation results of the hydrological method show that the flow hydrograph is a double-peak, and the two peaks occurred at 17:00 on August 16 and 6:00 on 17 August 2020, respectively.

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Section: Introductionmentioning

confidence: 99%

Application of multiple methods for reverse flow routing: A case study of Luxi river basin, China

Chen

et al. 2023

Front. Earth Sci.

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Experimental and numerical model studies of dike-break induced flood processes over a typical floodplain domain

et al. 2022

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2-D Modeling of hyperconcentrated fluid flow in curvilinear coordinates: dam break study

Ghobadian

2024

Appl Water Sci

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The hyperconcentrated fluid flow occurs as a result of heavy rainfall, during which a large amount of sediments from the upstream basin is washed away and suddenly increases the flow concentration of the alluvial channels. The stresses exerted by this type of fluid on the bed and body of the stream/river and related structures such as dam lead to the failure them and cause many human and financial losses. One of the important topics in the simulation of dam break caused by non-Newtonian fluid flow is the modeling of frictional stresses. In this research, after collecting several relationships to model the coefficient of friction loss of non-Newtonian fluid, a two-dimensional model was developed based on the numerical solution of shallow water equations in curvilinear coordinates to simulate hyperconcentrated flow. The results of the validation of the model were presented by comparing the measurement data of the suddenly complete dam break caused by the non-Newtonian fluid flow in the form of graphs, which all emphasize the accuracy of the developed model. It was also shown that for a suddenly complete dam break, with an increase in fluid volume concentration from 13.8 to 36.4%, the flow depth at the failure site increases by 18.8%. Next, asymmetric two-dimensional partial dam break of non-Newtonian fluid was simulated and compared with the results of Newtonian fluid. The results showed that the maximum flow velocity in the center of the fracture wall for the non-Newtonian fluid with a concentration of 32.2% is less than half of the maximum velocity of the Newtonian fluid.

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Modeling dam-break flows in channels with 90 degree bend using an alternating-direction implicit based curvilinear hydrodynamic solver

Cited by 13 publications

References 27 publications

Application of multiple methods for reverse flow routing: A case study of Luxi river basin, China

Application of multiple methods for reverse flow routing: A case study of Luxi river basin, China

Experimental and numerical model studies of dike-break induced flood processes over a typical floodplain domain

2-D Modeling of hyperconcentrated fluid flow in curvilinear coordinates: dam break study

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