Numerical Simulation of Flood Inundation due to Dam and Levee Breach

Ying, Xinya; Wang, Sam S. Y.; Khan, A. A.

doi:10.1061/40685(2003)366

Cited by 20 publications

(10 citation statements)

References 11 publications

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“…This numerical code has been fully tested and validated using the data from laboratory experiments and model tests, as well as limited field data available from past events (Ying et al 2003. It has been shown that the model is stable, oscillation-free, robust, and rigorously conserves mass.…”

Section: Flood Simulation Using Cche2d-flood Modelmentioning

confidence: 98%

Simulation-based decision support system for flood damage assessment under uncertainty using remote sensing and census block information

Altinakar

2011

Nat Hazards

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The level of damage of flood events does not solely depend on exposure to flood waters. Vulnerabilities due to various socio-economic factors such as population at risk, public awareness, and presence of early warning systems, etc. should also be taken into account. Federal and state agencies, watershed management coalitions, insurance companies, need reliable decision support system to evaluate flood risk, to plan and design flood damage assessment and mitigation systems. In current practice, flood damage evaluations are generally carried out based on results obtained from one dimensional (1D) numerical simulations. In some cases, however, 1D simulation is not able to accurately capture the dynamics of the flood events. The present study describes a decision support system, which is based on 2D flood simulation results obtained with CCHE2D-FLOOD. The 2D computational results are complemented with information from various resources, such as census block layer, detailed survey data, and remote sensing images, to estimate loss of life and direct damages (meso or micro scale) to property under uncertainty. Flood damage calculations consider damages to residential, commercial, and industrial buildings in urban areas, and damages to crops in rural areas. The decision support system takes advantage of fast raster layer operations in a GIS platform to generate flood hazard maps based on various user-defined criteria. Monte Carlo method based on an event tree analysis is introduced to account for uncertainties in various parameters. A case study illustrates the uses of the proposed decision support system. The results show that the proposed decision support system allows stake holders to have a better appreciation of the consequences of the flood. It can also be used for planning, design, and evaluation of future flood mitigation measures.

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Section: Flood Simulation Using Cche2d-flood Modelmentioning

confidence: 98%

Simulation-based decision support system for flood damage assessment under uncertainty using remote sensing and census block information

Altinakar

2011

Nat Hazards

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“…Opened boundary conditions are set downstream. This benchmark test was used within the CADAM project [80] and is also performed in [52,57,60,[81][82][83]. Computations are run with the first-order scheme on an unstructured mesh composed of 30 529 elements and a Manning roughness coefficient equal to n D 0:0162.…”

Section: Toce River Dam Breakmentioning

confidence: 99%

A robust and well‐balanced scheme for the 2D Saint‐Venant system on unstructured meshes with friction source term

Duran

2015

Numerical Methods in Fluids

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SummaryIn the following lines, we propose a numerical scheme for the shallow‐water system supplemented by topography and friction source terms, in a 2D unstructured context. This work proposes an improved version of the well‐balanced and robust numerical model recently introduced by Duran et al. (J. Comp. Phys., 235, 565–586, 2013) for the pre‐balanced shallow‐water equations, accounting for varying topography. The present work aims at relaxing the robustness condition and includes a friction term. To this purpose, the scheme is modified using a recent method, entirely based on a modified Riemann solver. This approach preserves the robustness and well‐balanced properties of the original scheme and prevents unstable computations in the presence of low water depths. A series of numerical experiments are devoted to highlighting the performances of the resulting scheme. Simulations involving dry areas, complex geometry and topography are proposed to validate the stability of the numerical model in the neighbourhood of wet/dry transitions. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Additionally, adverse weather conditions caused by global warming may result in unusual rainfall patterns in certain regions. Inundation due to dam and levee breaches has caused loss of life and property (Ying et al 2003). Consequently, the continuous study of flooding events is essential to prevent the occurrence of fatal disasters.…”

Section: Introductionmentioning

confidence: 99%

Sediment transport due to flooding from levee breach: a numerical application of the 2004 Niigata flood

Nwe

Hosoyamada

2010

International Journal of River Basin Management

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A fatal flood disaster due to levee breach of Kariyata River occurred in the Chuetsu area of Niigata Prefecture on 13 July 2004. Many houses were swept away and substantial areas of Sanjo City, Mitsuke City and Nakanoshima Town were flooded by muddy water. Removal of mud and other sediment deposits in residential areas in the aftermath of the flood was difficult. To better understand and prevent flood disasters, a two-dimensional numerical model for unsteady flow and non-uniform sediment transport was developed using the finite difference method on a staggered grid. The model consists of two main components: (1) a simplified hydraulic scheme that predicts floodwater flow depth and velocities; and (2) a sediment transport scheme that simulates multi-class sediment accumulation. The sediment model addressed the dominant process of sediment transport, settling, deposition and resuspension, and bed changes in the flooded regions around the break point on the Kariyata River. The model was calibrated using a combination of field data and calibration parameters derived from the existing literature. The simulated results show good agreement with field data.

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Numerical Simulation of Flood Inundation due to Dam and Levee Breach

Cited by 20 publications

References 11 publications

Simulation-based decision support system for flood damage assessment under uncertainty using remote sensing and census block information

Simulation-based decision support system for flood damage assessment under uncertainty using remote sensing and census block information

A robust and well‐balanced scheme for the 2D Saint‐Venant system on unstructured meshes with friction source term

Sediment transport due to flooding from levee breach: a numerical application of the 2004 Niigata flood

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