Use Of A Two Dimensional Flow Model To Quantify Aquatic Habitat
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Use Of A Two Dimensional Flow Model To Quantify Aquatic Habitat
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Author : D. Michael Gee
language : en
Publisher:
Release Date : 1985
Use Of A Two Dimensional Flow Model To Quantify Aquatic Habitat 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 1985 with Aquatic biology categories.
This paper describes the impacts of potential hydropower retrofits on downstream flow distributions at Lock and Dam No. 8 on the upper Mississippi River. The model used solves the complete Reynolds equations for two-dimensional free-surface flow in the horizontal plane using a finite element solution scheme. RMA-2 has been in continuing use and development at the Hydrologic Engineering Center and elsewhere for the past decade. Although designed primarily for the simulation of hydraulic conditions, RMA-2 may be used in conjunction with related numerical models to simulate sediment transport and water quality. In this study, velocity distributions were evaluated with regard to environmental, navigational and small-boat safety considerations. Aquatic habitat was defined by depth, substrate type and current velocity. Habitat types were quantified by measuring the areas between calculated contours of velocity magnitude (isotachs) for existing and project conditions. The capability for computing and displaying isotachs for the depth-average velocity, velocity one foot from the bottom and near the water surface was developed for this study. The product of this study effort is an application of the RMA-2 model that allows prediction of structural aquatic habitat in hydraulicaly complex locations. Elements of the instream flow group methodology could be incorporated to provide detailed predictions of impacts to habitat quality. Calibration of the numerical model to field measurements of velocity magnitude and direction is also described.
Role Of Small Computers In Two Dimensional Flow Modeling
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Author : D. Michael Gee
language : en
Publisher:
Release Date : 1985
Role Of Small Computers In Two Dimensional Flow 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 1985 with Hydraulics categories.
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).
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1985
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Aeronautics categories.
One Dimensional Model For Mud Flows
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Author : David R. Schamber
language : en
Publisher:
Release Date : 1985
One Dimensional Model For Mud Flows written by David R. Schamber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Laminar flow categories.
Hec 2 Water Surface Profiles Program
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Author : Vernon R. Bonner
language : en
Publisher:
Release Date : 1992
Hec 2 Water Surface Profiles Program written by Vernon R. Bonner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with HEC-2 (Computer program) categories.
A Muskingum Cunge Channel Flow Routing Method For Drainage Networks
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Author : Jürgen Garbrecht
language : en
Publisher:
Release Date : 1991
A Muskingum Cunge Channel Flow Routing Method For Drainage Networks written by Jürgen Garbrecht and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Channels (Hydraulic engineering) categories.
The Estimation Of Rainfall For Flood Forecasting Using Radar And Rain Gage Data
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Author : William J. Charley
language : en
Publisher:
Release Date : 1988
The Estimation Of Rainfall For Flood Forecasting Using Radar And Rain Gage Data written by William J. Charley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Flood forecasting categories.
Hec 1 And Hec 2 Applications On The Microcomputer
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Author : Harry W. Dotson
language : en
Publisher:
Release Date : 1987
Hec 1 And Hec 2 Applications On The Microcomputer written by Harry W. Dotson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with HEC-1 (Computer program) categories.
Runoff Simulation Using Radar Rainfall Data
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Author : John Charles Peters
language : en
Publisher:
Release Date : 1996
Runoff Simulation Using Radar Rainfall Data written by John Charles Peters and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Hydrologic models categories.