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Use of a Two-dimensional Flow Model to Quantify Aquatic Habitat

Use of a Two-dimensional Flow Model to Quantify Aquatic Habitat PDF Author: D. Michael Gee
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 22

Book Description
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.

Use of a Two-dimensional Flow Model to Quantify Aquatic Habitat

Use of a Two-dimensional Flow Model to Quantify Aquatic Habitat PDF Author: D. Michael Gee
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 22

Book Description
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

Role of Small Computers in Two-dimensional Flow Modeling PDF Author: D. Michael Gee
Publisher:
ISBN:
Category : Hydraulics
Languages : en
Pages : 18

Book Description


Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports PDF Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1152

Book Description


Multi-purpose, Multi-reservoir Simulation on a Pc

Multi-purpose, Multi-reservoir Simulation on a Pc PDF Author: Bill Eichert
Publisher:
ISBN:
Category : Computer simulation
Languages : en
Pages : 30

Book Description
The methodology and difficulties in converting a large, general purpose, mainframe, batch oriented computer program (for reservoir simulation) to work effectively in the PC environment are described in this paper. A brief overview of the present capabilities of the general purpose reservoir simulation program (HEC-5), that works on mainframe and MS DOS compatible computers, is also presented. Keywords: Simulation, Personal computer, Reservior system, Flood control, Hydropower, Water supply, Computer programs, Multi-purpose, Multi-reservoir, FORTRAN. (jes).

HEC Models for Urban Hydrologic Analysis

HEC Models for Urban Hydrologic Analysis PDF Author:
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 24

Book Description


HEC River Analysis System (HEC-RAS)

HEC River Analysis System (HEC-RAS) PDF Author: Gary W. Brunner
Publisher:
ISBN:
Category : HEC-RAS (Computer program)
Languages : en
Pages : 16

Book Description


The HEC Hydrologic Modeling System

The HEC Hydrologic Modeling System PDF Author: John Charles Peters
Publisher:
ISBN:
Category : HEC-HMS (Computer program)
Languages : en
Pages : 16

Book Description


Real-time Snow Simulation Model for the Monongahela River Basin

Real-time Snow Simulation Model for the Monongahela River Basin PDF Author: Daniel H. Hoggan
Publisher:
ISBN:
Category : Monongahela River Watershed (W. Va. and Pa.)
Languages : en
Pages : 16

Book Description


The HEC NexGen Software Development Project

The HEC NexGen Software Development Project PDF Author: Darryl W. Davis
Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 18

Book Description


Risk-based Analysis for Corps Flood Project Studies

Risk-based Analysis for Corps Flood Project Studies PDF Author: Earl E. Eiker
Publisher:
ISBN:
Category : Environmental risk assessment
Languages : en
Pages : 16

Book Description