Two Dimensional Floodplain Modeling

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Two Dimensional Floodplain Modeling

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Author : D. Michael Gee
language : en
Publisher:
Release Date : 1990

Two Dimensional Floodplain Modeling written by D. Michael Gee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Floodplain management categories.

A two-dimensional horizontal finite element numerical model (RMA-2) was applied to a 15 mile (24 km) river channel-floodplain reach in West Germany. Previous applications of such models have been restricted to much smaller scales. The results indicate that finite element schemes may successfully estimate river stage in large scale floodplain applications. Computed stage hydrographs compared well with observed data using loss coefficients within expected ranges. Two-dimensional flow models have been applied to certain classes of river channel problems. Applications have included detailed analyses of flow patterns near structures such as bridges and floodplains. In all these problems the scale of interest has been small, e.g. reaches of river a few river widths long. Many estuary studies have been done that were of large scale; some of these utilized a hybrid (numerical plus physical) modeling technique. In a review of the application of finite element methods to river channels, Samuels reported that the river channel was resolved separately from the floodplain in only two studies. Missing in previous work is attention to large scale floodplain modeling. The work reported in this paper focuses on the feasibility and accuracy of applying a two-dimensional flow model to a large floodplain. Traditional floodplain studies have used semi-empirical flow routing with steady, one-dimensional computation of water surface elevations to define inundated areas. Keywords: Army Corps of Engines. (kr).

Application Of Two Dimensional Hydraulic Modeling In Riverine Systems Using Hec Ras

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Author : Abdulaziz Saeed Alzahrani
language : en
Publisher:
Release Date : 2017

Application Of Two Dimensional Hydraulic Modeling In Riverine Systems Using Hec Ras written by Abdulaziz Saeed Alzahrani and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Bear Creek (Ohio) categories.

Flood simulation models have a wide variety of approaches that are available to compute the water surface elevations associated with a flood event. Some of these models use a One-dimensional (1D) approach, others use a Two-dimensional (2D), and there are others allow the use of integrated 1D and 2D simulations. In 2015, the US Army Corps of Engineering Hydrologic Engineering Center (HEC) released HEC-RAS Version 5.0.3 which performs 1D steady and unsteady flow calculation, as well as 2D unsteady flow calculation. 2D modeling is likely to become more common due to HEC-RAS. This paper is the comparison of 1D and 2D models for a water level in the channel and the floodplain inundation. Two treatments of the problem are explored: (1) a 1D model based upon discretization of floodplain units into storage areas; (2) a 2D model for a channel and a floodplain surface. The two models were tested on the Great Miami River and Bear Creek. The models were assessed by comparison with measured inundation extent. Also, the study reviews the academic basis for modeling floodplain flow based on a two-dimensional analysis. The goal of the proposed research effort will be to include the application of 2D unsteady-state models in future releases of the HEC-RAS 2D model.

Mathematical Flood Plain Modelling

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Author : H W. Weiss
language : en
Publisher:
Release Date : 1975

Mathematical Flood Plain Modelling written by H W. Weiss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.

Two Dimensional Flood Plain Modeling

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Author : Cleighton D. Smith
language : en
Publisher:
Release Date : 1978

Two Dimensional Flood Plain Modeling written by Cleighton D. Smith and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Floodplains categories.

A Two Dimensional Flood Routing Calculation

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Author : Charles Noble
language : en
Publisher:
Release Date : 1982

A Two Dimensional Flood Routing Calculation written by Charles Noble and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.

The desirability of accurately predicting the extent and duration of flooding resulting from the partial or total breach of a dam has been emphasized recently. The most practical way to meet this need is the development and use of good computer-based models. In order to predict the routing of floods, several hydrograph routing and one-dimensional models have recently been developed. Among the better known models are those employed in the code DAMBRK, Fread (1980) and in HEC-1 (1973). These models have proved to be quite good in predicting the flooding in those cases which have been amenable to a one-dimensional treatment. The accuracy of these models in situations which are clearly two-dimensional in nature is suspect, however. It is thus desirable to develop two-dimensional flood routing models to properly handle those situations in which the one-dimensional models are inadequate. Energy Incorporated (EI) has developed a computer code, FLOOD, that describes the two-dimensional motion of a flood. An analysis of the hypothetical Mackay Dam failure was performed using FLOOD. In this paper are given the equations used by EI, the numerical algorithm used for their solution, and the results of the Mackay Dam analysis.

Two Dimensional Flow Modeling

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Author : Robert C. MacArthur
language : en
Publisher:
Release Date : 1982

Two Dimensional Flow Modeling written by Robert C. MacArthur and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Fluid dynamics categories.

Advances To Fast Response Two Dimensional Flood Modeling

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Author : David R. Judi
language : en
Publisher:
Release Date : 2009

Advances To Fast Response Two Dimensional Flood Modeling written by David R. Judi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Floods categories.

Development And Application Of A Two Dimensional Hydrodynamic Model For Riverine Floodplain Environments

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Author : Stephen Wayne Andrews
language : en
Publisher:
Release Date : 2007

Development And Application Of A Two Dimensional Hydrodynamic Model For Riverine Floodplain Environments written by Stephen Wayne Andrews and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.

Improvements In Fast Response Flood Modeling

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Author :
language : en
Publisher:
Release Date : 2009

Improvements In Fast Response Flood Modeling written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

It is becoming increasingly important to have the ability to accurately forecast flooding, as flooding accounts for the most losses due to natural disasters in the world and the United States. Flood inundation modeling has been dominated by one-dimensional approaches. These models are computationally efficient and are considered by many engineers to produce reasonably accurate water surface profiles. However, because the profiles estimated in these models must be superimposed on digital elevation data to create a two-dimensional map, the result may be sensitive to the ability of the elevation data to capture relevant features (e.g. dikes/levees, roads, walls, etc ...). Moreover, one-dimensional models do not explicitly represent the complex flow processes present in floodplains and urban environments and because two-dimensional models based on the shallow water equations have significantly greater ability to determine flow velocity and direction, the National Research Council (NRC) has recommended that two-dimensional models be used over one-dimensional models for flood inundation studies. This paper has shown that two-dimensional flood modeling computational time can be greatly reduced through the use of Java multithreading on multi-core computers which effectively provides a means for parallel computing on a desktop computer. In addition, this paper has shown that when desktop parallel computing is coupled with a domain tracking algorithm, significant computation time can be eliminated when computations are completed only on inundated cells. The drastic reduction in computational time shown here enhances the ability of two-dimensional flood inundation models to be used as a near-real time flood forecasting tool, engineering, design tool, or planning tool. Perhaps even of greater significance, the reduction in computation time makes the incorporation of risk and uncertainty/ensemble forecasting more feasible for flood inundation modeling (NRC 2000; Sayers et al. 2000).

The Altar Of Incense

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Author :
language : en
Publisher:
Release Date : 1839

The Altar Of Incense written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1839 with categories.