Author: Zhi Li (Civil engineer)Publisher:
ISBN:
Category : Flow meters
Languages : en
Pages : 23
Book Description
Hydrodynamic Model Development for the Trinity River Delta
Author: Zhi Li (Civil engineer)Publisher:
ISBN:
Category : Flow meters
Languages : en
Pages : 23
Book Description
A Study of the Hydrological and Nutrient Exchage Processes in the Trinity River Delta, Texas
Author: Larry M. HauckPublisher:
ISBN:
Category : Nutrient pollution of water
Languages : en
Pages : 137
Book Description
Trinity River Project, Project Memorandum No.4, GDM
Author: Estuarine and Wetland Processes
Author: Keith B. AterPublisher: Springer Science & Business Media
ISBN: 147575177X
Category : Science
Languages : en
Pages : 652
Book Description
Estuaries and Wetlands are important coastal resources which are subject to a great deal of environmental stress. Dredging, construction, creation of intertidal wetlands, regulation of fresh water flow, and pollution are just a few of the activities which affect these coastal systems. The need to predict the effects of these perturbations upon ecosystem dynamics, particularly estuarine fisheries, as well as on physical effects, such as sedimentation and salt intrusion, is of paramount importance. Prediction requires the use of models, but no model is likely to be satisfactory unless fundamental physical, chemical, sedimentological, and biological processes are quantitatively understood, and the appropriate time and space scales known. With these considerations in mind, the Environmental Laboratory, U. S. Army Engineer Haterways Experiment Station,* Vicksburg, Mississippi, sponsored a workshop on "Estuarine and Wetland Processes and Water Quality Modeling" held in New Orleans, June 1979. The contents of this volume have been selected from the workshop papers. The resulting book, perhaps more than any other symposium proceed ings on estuaries and wetlands, attempts to review important pro cesses and place them in a modeling context. There is also a distinct applied tinge to a number of the contributions since some of the research studies were motivated by environmental assessments. The difference in title between this volume and the workshop re flects more accurately the contents of the published papers.
Modeling Hydrodynamic Fluxes in the Nueces River Delta
Author: Andrea Johanna RyanPublisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 232
Book Description
Increasing municipal and regional water demands have reduced freshwater inflows to the Nueces Delta. These flow reductions impair the marsh ecosystem's functionality. As part of a United States Army Corps of Engineers multi-agency collaboration to restore the Nueces River and its tributaries, we have developed a mass-conservative hydrodynamic model to analyze fate and transport of freshwater and tidal inflows to the Nueces Delta. The model is built upon the LIDAR bathymetric data collected by the Coastal Bend Bays and Estuaries Program (CBBEP). Input data includes tidal, salinity, and wind data obtained from the Texas Coastal Ocean Observation Network (TCOON), pumping data from the Nueces River Authority, precipitation data from NOAA, and river flow from the USGS. The underlying modeling method uses conservative finite-difference/volume discretization on a Cartesian rectangular grid to simulate the movement of water and salt fluxes across the delta. Sub-models to represent the hydraulic influence of flow constrictions (e.g. railroads trestles, culverts) have been developed. The model's response to forcing from wind, precipitation, and roughness were analyzed. The time to spin up for the model was analyzed and found to be approximately seven days. Preliminary validation of the model was qualitative but the overall trend of the tide coming in appears correct at the monitoring stations analyzed, indicating that the lowest frequency forcing of the tide and wind are correct. The effects of pumping into the delta were investigated under different pumping conditions to reveal the area inundation and impacts on salinity from pumping.
Development of a Two-dimensional Hydrodynamic Model of the Tidal Portion of Lower Rio Grande River, Texas
Author: Bijay BokhimPublisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 152
Book Description
Development of a Southern Delta Tidal Hydrodynamic Model
Author: Mike FordPublisher:
ISBN:
Category : Delta Region (Calif.)
Languages : en
Pages : 38
Book Description
A Diffusion Hydrodynamic Model
Author: Theodore V. Hromadka IIPublisher: BoD – Books on Demand
ISBN: 1839628170
Category : Technology & Engineering
Languages : en
Pages : 90
Book Description
The Diffusion Hydrodynamic Model (DHM), as presented in the 1987 USGS publication, was one of the first computational fluid dynamics computational programs based on the groundwater program MODFLOW, which evolved into the control volume modeling approach. Over the following decades, others developed similar computational programs that either used the methodology and approaches presented in the DHM directly or were its extensions that included additional components and capacities. Our goal is to demonstrate that the DHM, which was developed in an age preceding computer graphics/visualization tools, is as robust as any of the popular models that are currently used. We thank the USGS for their approval and permission to use the content from the earlier USGS report.
Author: 
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