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Capacity Expansion of Water Distribution Systems?A Case Study
Capacity expansion and necessary capital improvements to meet the water supply demand for years 1990-2020 for the U. S. Route 1 corridor development from South Brunswick to Princeton,...

Developing a User Friendly System for Water Distribution Management Applications
A hydraulic computer model of a water distribution system that can be updated with current billing (customer meter readings) information automatically. The model was calibrated with field...

Magnitude and Frequency Analysis in Large Rivers
A study of the magnitude and frequency of sediment transport was conducted on the Mississippi River at Natchez, MS, Red River at Alexandria, LA, and Pearl River at Bogalusa, LA. The individual...

Alternative Methods for Representing Sinkholes in Three-Dimensional Ground Water Flow Models
Two methods of representing the sinkholes in central Florida were investigated with a three-dimensional finite element model recently developed by Camp Dresser & McKee Inc. Both...

Ground Water Flow Simulation in a Small Drainage Basin
This paper describes the development and use of a numerical simulation approach for predicting ground water flow in a small drainage basin in southern California. The purpose of the modeling...

Effects of Reservoir Regulation on Channel Morphology
A case study is presented in which such a multidisciplinary approach was used to evaluate the impacts of regulated outflows from the recently completed Warm Springs Dam Project (Sonoma...

Two-Dimensional Groundwater Transport Subgrids in a 3-D Flow Model
The USGS Modular 3-D Finite Difference Ground-Water Flow Model by McDonald and Harbaugh (MODULAR) simulates ground-water flow in three dimensions by breaking the modeled region into several...

Calculating Runaway Pressure Surges in Small Hydro Units
Determination of the runaway speed and concomitant pressure surges requires consideration of both the turbine rotodynamics and the waterhammer equations. In this paper a simplified method...

Depleted Uranium Migration in Stream Bedload Environment
The objective of this paper is to present results of a comprehensive hydrologic transport study, designed to assess potential surface water contamination, resulting from the release of...

Analysis of Estuarine Tracer-Gas Transport and Desorption
The riverine tracer-gas technique provides a direct, reach-averaged measure of gas exchange, is fairly simple to implement, and is widely accepted for determining reaeration-rate coefficients...

A Large-Scale Groundwater Transport and Dispersion Test: The First 1000 Days
TVA is conducting a large-scale field experiment to quantify the groundwater transport and dispersion of leachates from solid disposal facilities. This project is an integral part of the...

Contaminant Transport from an Array of Sources
The authors show analytic solutions to the problem of contaminant dispersion from an array of point sources in a waste disposal site. These solutions are for waste sources in a fluid-saturated...

Riverine 2D Random Walk Transport Model
A random walk transport model was developed to avoid the amplitude and phase errors inherent in finite difference models. A three-point probability distribution was used for the random...

Lessons from the Failure of a Needle Valve
In 1984 a manually operated, hydraulically actuated 66-inch needle valve ruptured due to water hammer. The circumstances that caused the failure were reconstructed through extensive analysis...

Delivery System Management Via Dynamic Programming
Management of irrigation water delivery systems may involve allocating limited water supplies over both time and space under uncertain future demands. The physical delivery systems are...

A Simulation Procedure for On-Farm Irrigation Systems Planning
A simulation modeling package has been developed for modeling on-farm irrigation water supply and application systems. The modeling package can consider up to 6 different application systems...

Shallow Groundwater Reuse in Alfalfa Irrigation
Two shallow groundwater reuse options in alfalfa irrigation are examined. Alfalfa water use from the water table is investigated using a drainage component model. It is shown that alfalfa...

On-Farm Management Alternatives to Reduce Subsurface Drainage in the San Joaquin Valley, California?Constraints to Implementation
The most cost effective approach for mitigating the drainage problem is incorporating on-farm management practices that reduce percolation and seepage losses to the shallow groundwater...

Considerations for Sizing Water Delivery Systems
The purpose of a water delivery system is to deliver irrigation water to a farm and its design should be based on meeting the requirements of farm water use. The rate, duration and frequency...

Factors Influencing Conveyance Efficiency
Losses from a water distribution system are inadequately defined by reference to only the gross conveyance efficiency (Ec) of the system. The various unavoidable and avoidable losses that...

 

 

 

 

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