Analytical Model for Management of Alluvial Aquifers

Under Colorado's appropriative water right system, withdrawals by junior ground water rights must be curtailed to protect senior surface water appropriators sharing the same river system unless the ground water users replace the amount of their injury to the river under an approved plan for augmentation. Compensation of such injury with surface water may not only be expensive but unreliable in dry years. As an alternative, the curtailment of pumping may be obviated by recharging unused surface water into the aquifer when available and withdrawing it when needed. In order to manage such an operation, a practical tool is required to accurately determine that portion of the recharge water that does not return to the river before pumping for irrigation. A digital model was used for this purpose in a demonstration recharge project located in the South Platte River basin in northeastern Colorado. This paper summarizes the experiences gained from this project, the results of the digital model, the economic value of recharge, and the feasibility of the operation. It was determined through the use of the digital model that, with the given conditions in the area, 77 percent of the recharged water remained available for pumping. Economic analyses showed that water could be recharged inexpensively averaging about two dollars per acre foot.

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A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT¹

Lee

Qazi

Danielson

1980

J American Water Resour Assoc

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EFFECTS OF NO‐FLOW RIVER CONDITIONS ON THE PLATTE RIVER WELL FIELD¹

Nguyen¹,

Gilliland

1988

J American Water Resour Assoc

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Effects of no‐flow river conditions on the quantity and quality of water in the Platte River well field of the City of Grand Island, Nebraska, were examined utilizing a finite‐difference computer simulation model specifically developed for this well field. Results suggest that the effects of these no‐flow periods on water quality may be most important. In particular, the no‐flow periods eliminate the hydraulic barrier between the well field and an area north of the River that is contaminated with nitrate (concentrations in the 20 to 40 mg/1 NO3‐N range). They also change the direction and velocity of movement of the contaminated ground water. Simulation results indicate that contaminated ground water moves toward the well field with a velocity of 0.42 ft/d after 30 days of no‐flow and 1.43 ft/d after 180 days of no‐flow. Limiting no‐flow conditions to 10 consecutive days would protect the well field.

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Analytical Model for Management of Alluvial Aquifers

Cited by 2 publications

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A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT¹

A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT¹

EFFECTS OF NO‐FLOW RIVER CONDITIONS ON THE PLATTE RIVER WELL FIELD¹

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Analytical Model for Management of Alluvial Aquifers

Cited by 2 publications

References 0 publications

A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT1

A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT1

EFFECTS OF NO‐FLOW RIVER CONDITIONS ON THE PLATTE RIVER WELL FIELD1

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Product

Resources

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A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT¹

A DIGITAL MODEL APPLIED TO GROUND WATER RECHARGE AND MANAGEMENT¹

EFFECTS OF NO‐FLOW RIVER CONDITIONS ON THE PLATTE RIVER WELL FIELD¹