Author: David L. GundlachPublisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 44
Book Description
Potential Use of Digital Computer Ground Water Models
Author: David L. GundlachPublisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 44
Book Description
A Muskingum-Cunge Channel Flow Routing Method for Drainage Networks
Author: Jürgen GarbrechtPublisher:
ISBN:
Category : Channels (Hydraulic engineering)
Languages : en
Pages : 40
Book Description
Selected Water Resources Abstracts
Author: Use of a Two-dimensional Flow Model to Quantify Aquatic Habitat
Author: D. Michael GeePublisher:
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.
Annual Extreme Lake Elevations by Total Probability Theorem
Author: Harold E. KubikPublisher:
ISBN:
Category : Storm surges
Languages : en
Pages : 18
Book Description
Role of Small Computers in Two-dimensional Flow Modeling
Author: D. Michael GeePublisher:
ISBN:
Category : Hydraulics
Languages : en
Pages : 18
Book Description
Modeling Water Resources Systems for Water Quality
Author: R. G. WilleyPublisher:
ISBN:
Category : HEC-5 (Computer program)
Languages : en
Pages : 22
Book Description
Modeling and Managing Water Resource Systems for Water Quality
Author: R. G. WilleyPublisher:
ISBN:
Category : Reservoirs
Languages : en
Pages : 28
Book Description
Experiences of the Hydrologic Engineering Center in Maintaining Widely Used Hydrologic and Water Resource Computer Models
Author: Bill EichertPublisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 22
Book Description
Determination of Land Use from Satellite Imagery for Input to Hydrologic Models
Author: Robert P. WebbPublisher:
ISBN:
Category : Aerial photography in hydrology
Languages : en
Pages : 28
Book Description
A land use/land cover identification methodology using LANDSAT imagery has been applied to six watersheds across the U.S. The land use information is stored in a grid cell data bank and is the basis for calibration of hydrologic parameters for watershed models. Flood frequency studies have been completed on four of the watersheds with land use derived from both satellite data and conventional low altitude aerial photography. This paper discusses our experience using the LANDSAT land use classification procedure and compares hydrologic results obtained from the alternative determinations of land use. (Author).