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Coping with Agricultural Shortages
Coping with agricultural shortages occupies most of the time and energy of the Kern County Water Agency (Agency). The Agency's participation in the State Water Project (SWP) originated...

Economic Costs to the State Water Project of Environmental Protection and Mitigation Measures
The State Water Project stores water in the Sierra Nevada for subsequent diversion from the Bay and Delta for use by millions of Californians. Project construction and operation have caused...

Designing Self-Cleaning Wet Wells for Wastewater Pumping
Guidelines for the design of self-cleaning wet wells for variable speed pumps are given. The progress of research on the design of wet wells for constant speed pumps, including submersible...

Real Time Forecast of Landfill Leachate Flow
A computer model was written to describe the generation of landfill leachate due to large precipitation events. The landfill is described as a multi-layer system, each layer having its...

Nonlinear Flow in Embankments
For a large number of water resources projects, the Dupuit-Forchheimer (D-F) assumption is considered a viable design criterion and, consequently, Darcy law is used to determine the locus...

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...

The Coyote Dam Outlet Works Replacement Project: Hazard Reduction
The Santa Clara Valley Water District's Coyote Dam faced three major concerns: siltation of the existing outlet; a fault that crosses the existing outlet pipe; and the dam toe and the...

Velocity Reduction at a Submerged Pipe Outlet
This paper presents the results of a specific model study to reduce the 17.5 m/s (57.3 ft/s) discharge velocity of a submerged circular pipe discharging at floor level into a 30.5 m (100...

Compacted Spillway
The compacted spillway (CSW) refers to a spillway accompanied by jets located on its face to dissipate the excess energy. The (CSW) has a standard ogee profile with three jets located...

Equations to Predict Critical Submergence at Horizontal Hydraulic Intakes
The formation of free surface vortices at hydraulic intakes can disrupt operation and damage machinery. It is also a serious safety concern. Theoretical investigations and laboratory tests...

Total Sediment Loads of Tropical Rivers
Unmeasured and total sediment discharges were computed for 107 sets of data from the Amazon and Orinoco Rivers and their major tributaries. Unmeasured loads were generally small except...

Sedimentation and Flood Protection for the Lower Yellow River
The Lower Yellow River is known for its disastrous floods in the past. After 4 decades without major floodings, rapid economic and population growths along the River have drew concerns...

Refined Modelling of Water Quality Constituents in a Semi-Enclosed Coastal Wetland Basin
Details are given of the refinements to a numerical model to improve the representation of the advective transport of water quality constituents. The higher order accurate scheme adopted...

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...

Environmental Control of Wetland Plant Communities
We have determined hydrologic regimes at a variety of sites while conducting studies to identify factors controlling wetland plant community composition and distribution. We have had relatively...

Surface Flows Over Intertidal Marshes
A marsh-flow measuring device has been designed to quantify the flow across the marsh surface. The fluorometric technique by tracking the visible substance (Rhodamine red dye) applied...

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...

Debris Flow Velocity Estimation Methods for Natural Hazard Assessment
Debris flows are a special category of fluid and mass flow phenomena in which natural runoff entrains extremely high concentrations of sediment. The sediment-water mixture has properties...

Federal Levee Effects on Flood Heights Near St. Louis
A physical model of the Middle Mississippi River was used to perform quantitative analyses of Federal levee effects on flood heights. Contrary to some opinions of the general public, these...

 

 

 

 

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