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Integrated Description of Wetland Hydrology and Ecology by Mathematical Models
The agricultural utilization of the natural zone between the terrestrial and the aquatic system has reduced these important bufferzones in the last 30 years. The use of wetlands as nutrient...

Research Needs in Hydraulic Engineering
The information presented herein has barely dented the surface of the needs for hydraulic research, and of the methods required to obtain funding for that research. The responses and reports...

Modeling Ground Water Mounding in a Heterogeneous Unconfined Aquifer
A numerical, potential flow solution for the flow pattern and water table elevation due to recharge in unconfined, heterogeneous aquifers has been developed using boundary, conforming...

Development of the Lake Okeechobee Watershed Phosphorus Transport Model
The Lake Okeechobee watershed phosphorus model was developed to route flows and phosphorus loadings associated with point and nonpoint sources through a watershed transport system, and...

Orange County Florida Landfill Dilute Leachate Wetland Treatment and Restoration System
The Orange County Landfill began operation in 1971 as an EPA demonstration project for the purpose of defining landfill operations in high groundwater table areas. To prevent groundwater...

Development of a Two-Layered Groundwater Model for the Taipei Basin
The objective of this paper is to develop a groundwater model for flow simulation in the Taipei basin. A conceptual model of the basin is first developed; the model consists of an upper...

Development of San Gorgonio Pass Groundwater Flow Model I. Model Calibration
A groundwater flow model is being developed for use in management of a planned groundwater storage and recovery program for the Beaumont Storage Unit of the San Gorgonio Pass groundwater...

Modeling Saltwater Intrusion Control Measures in the West Coast Basin
In the 1960's and 1970's the West Coast Basin Barrier was constructed to protect tha major coastal groundwater basin from further salt water intrusion, which had been occurring as a result...

A Unified Optimization?Simulation Aquifer Management Model
The optimal management scenario for a groundwater production system represents a delicate balance between the water production operational schedule, which will result in the least demand...

An Optimal Parameter Estimation Model for Groundwater Resource Management
An optimal parameter estimation model is developed to identify the locations of wells, to determine pumping magnitude, and to calculate transmissivity coefficients in a confined aquifer...

Simulating THM Precursors Transport with DWRDSM
A study was conducted by the California Department of Water Resources (DWR) to demonstrate the ability of its Delta Simulation Model (DWRDSM) to simulate fate and movement of inorganic...

Density Currents in Pollutant Transport and Mixing
A buoyant spreading model for the current-advected plume is formulated including several distinct mechanisms: convective spreading, interfacial friction spreading, entrainment at the density...

Supply of Large Woody Debris in a Stream Channel
The amount of large woody debris that potentially could be transported to bridge sites was assessed in the basin of the West Harpeth River in Tennessee in the fall of 1992. The assessment...

Multi Objective Detention Outlet Control Structure
Increasing numbers of stormwater management ponds are being included in the design of urban and rural drainage projects. This is in part due to the environmental outcry to clean up our...

Fractal Dimension of Aggregated Sediments
Cohesive sediment dynamics in estuarine systems are strongly affected by particle aggregation and flocculation. These processes are mainly controlled by the Brownian motion, flow turbulence...

Hydrodynamic and Toxic Contaminant Dispersion in the Lower St. Marys River
A numerical model that simulates the hydrodynamics and the transport of toxic contaminants in the Lower St.Marys River is being calibrated and verified using field data from the U.S. Army...

Modeling Low Flow Transport of Nonconservative Pollutants in Streams
The complex nature of low flow transport and transformation of nonconservative pollutants in natural streams has been investigated using a numerical solution of a proposed mathematical...

Urban Storm Water Instrumentation: a Field Observation
The Dallas-Fort Worth, Texas metroplex has 7 cities with populations of at least 100,000 that are required to meet national Pollutant Discharge Elimination System (NPDES) permitting requirements...

Application of Environmental Regulations on Design of Hydraulic Structures for Open Cooling Water System
Design of intake and discharge structures for an open cooling water system for a thermal power plant requires that the design of hydraulic structures meets the federal, state, and local...

Shifts in Solute Transport Direction Induced by Transient Flow
Traditionally, solute transport projections have focussed on the long-term, steady state conditions expected to prevail in a groundwater system. However, transient effects may often dominate...

 

 

 

 

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