Hydrology of the Upper 12 Inches of Well Drained: Imperfectly Drained: and Poorly Drained Mineral Soil Profiles

Underground Liquid Waste Disposal
As of mid-1973, at least 278 industrial wastewater injection wells had been constructed in 24 states. Statistics concerning these wells are presented and their environmental impact appraised....

Hydraulic Design of Vertical Stilling Wells
Vertical stilling wells are economical and ideally suited to dissipate high energy flow. Model studies established general design criteria for vertical stilling wells using a standard...

South Platte River Flow Correlations
It is pointed out that an effective management of the water resources of the South Platte River will require a quantitative prior knowledge of what effects changes will have. A computation...

Determining Optimal Well Discharge
The cost of pumping ground water is a major factor in water supply. It is necessary to pump a given well at the discharge that maximizes the net benefit of the operation. Previous criteria...

Air Entrainment in Surface Rollers
Studies indicate that surface rollers are well suited as hydraulic aeration devices for water quality enhancement. An important indicator concerning the efficiency of such devices is the...

Concepts for Ground-Water Regulatory District
With more use of ground water, greater attention must be given to the environmental side of well field design. Where serious environmental problems, such as lowered lake levels, are a...

Analytical Model for Management of Alluvial Aquifers
Under the doctrine of prior appropriation, the recent inclusion of wells in the existing priority system of water rights in Colorado has created new problems for water management in tributary...

Radial Dispersion in Ground-Water Flow
Singular perturbation techniques are used to obtain approximate concentration distributions that result when a recharge well discharges a finite volume of radioactive pollutant into an...

Optimal Pumping for Aquifer Dewatering
A method is presented for determining the optimal well locations and steady-state pumping scheme for dewatering a site. It uses the finite difference approximations of the ground-water...

Method of Additional Seepage Resistances—Theory and Application
The method for additional seepage resistance based on the local consideration of zones of sharp flow deformation caused by partially penetrating boundaries is described. The allowance...

Drawdown in Compressible Unconfined Aquifer
Elastic response of unconfined formations to pumping is considered. The nonequilibrium drawdown equation for a partially penetrating well discharging at a constant rate in an unconfined...

Orthonormalization Applied to Ground-Water Flows
The Gram-Schmidt orthonormalization procedure is presented as a numerical method easily adaptable to digital computation for the solution to steady-state ground-water flow problems. The...

Transient Flow to Finite Well in Unconfined Aquifer
The problem of a nonsteady radial flow toward a finite well in an unconfined aquifer is solved by a form of the Galerkin method. The equations are reduced to a set of coupled nonlinear...

Contamination of Discharge Well from Recharge Well
The recovery of waste water by a discharge well from a neighboring recharge well is studied. The wells are situated in a confined aquifer through with there is uniform flow. The local...

Validity of Dupuit-Forchheimer Equation
The Dupuit-Forchheimer equation describing unconfined ground-water flow is limited by the underlying assumptions inherent in its derivation. A validity criterion is developed from an analysis...

Numerical Solution of Multiphase Well Flow
A method is presented for numerically solving immiscible multiphase well flow considering three compressible fluids, two liquids, and one gas, and assuming isothermal conditions. Capillary...

Well Efficiency and Skin Effect
The purpose of this paper is to present a technique for determining the skin effect using previously derived flow equations. This technique is applicable only to wells affected by losses...

Tensiometer Use in Shallow Ground-Water Studies
Tensiometers installed with a ground surface or other reference can be used to determine ground-water equipotentials and the position of the water table in the field. Tensiometer determined...

Water Well Design for Earthquake-Induced Motion
Earthquake records indicate negligible damage to adequately constructed water wells that are located away from faults or areas of unstable ground. For nuclear power plants, three factors...

 

 

 

 

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