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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...

Input Programs for Engineering Applications
This paper discusses several input program types and the data structures associated with them. Two input programs were designed for KYPIPEF to demonstrate the use of files of records and...

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...

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...

Hydraulic Investigation of the Cache River Basin
To develop a comprehensive solution to the problems that exist in the basin, the Illinois State Water Survey has initiated a hydraulic study. This ongoing research includes collection...

Controlled-Drainage Supplements Subirrigation in Humid Regions
A computer simulation was conducted using climate and soil conditions of the humid southern U. S. to demonstrate optional operating methods for dual controlled-subdrainage/subirrigation...

Improving Drainage with Laser Controlled Land Grading in the Red River Valley of the North
This paper evaluates a laser controlled land grading project in the Red River Valley of the North. Graded fields are compared with ungraded fields to measure changes in dryland crop yields...

Evaluation of Water Quality from a Drainage-Subirrigation System in Georgia
Nitrate-N, Ammonium-N and Phosphate-P concentrations were measured from shallow subsurface wells and outlets of a drainage-subirrigation system in the Georgia flatwoods for comparison...

Subsurface Drainage for Erosion Reduction on Croplands of Northwestern Oregon
Subsurface drains installed as a relief system on sloping cropland reduced surface runoff and soil loss from silty soils with underlying slowly permeable layers in northwestern Oregon....

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...

Reducing Maintenance Costs of Irrigation Systems
Reducing the costs of maintaining an irrigation water delivery system is becoming more important as the financial problems of the irrigators become more critical. The maintenance costs...

Sprinkler Erosion Model
The Soil Conservation Service has developed a model to evaluate the effect of various sprinkler irrigation systems with associated agronomic practices. Many researchers have dealt with...

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...

Interactive Surface Irrigation Design and Evaluation Software
This paper outlines the features and capabilities of a comprehensive personal computer software system for use by irrigation engineers in design and evaluation of continuous and surge...

 

 

 

 

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