Interface upconing due to a horizontal well in unconfined aquifer

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · Ground Water; (United States)

DOI:https://doi.org/10.1111/j.1745-6584.1987.tb02151.x· OSTI ID:6082543

Gupta, A D; Gaikwad, V P

A simplified mathematical model is developed to predict the equilibrium location of upconed interface due to a horizontal well in an unconfined coastal aquifer of finite thickness. The model is based on Dupuit assumption and Ghyben-Herzberg approximation with modified boundary conditions along the shoreline deduced from available analytical solutions. For a specified natural flow condition, the amount of fresh-water discharge to the sea as well as the interface profile and length of intrusion can be determined. With the specification of the permissible extent of upconing from the natural interface location at any section, the model provides an estimate of the amount of water that can be withdrawn by a horizontal well, the upconed interface profile, and the additional length of intrusion. The computed interface profile for the natural flow condition is found to be in good agreement with the results of available analytical solutions. Comparison with the laboratory tests for the upconing case indicates that the simplified model provides a reasonable approximation of the interface profile for assessment of water withdrawal from a coastal aquifer at the initial stage of planning.

• Research Organization: Div. of Water Resources Engineering, Asian Institute of Technology, P.O. Box 2754, Bangkok 10501
• OSTI ID: 6082543
• Journal Information: Ground Water; (United States), Journal Name: Ground Water; (United States) Vol. 25:4; ISSN GROWB
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ANALYTICAL SOLUTION
AQUIFERS
BOUNDARY CONDITIONS
COASTAL REGIONS
DIRECTIONAL DRILLING
DRILLING
FLOW MODELS
FRESH WATER
HYDROGEN COMPOUNDS
HYDROLOGY
INCLINATION
INTERFACES
MATHEMATICAL MODELS
OXYGEN COMPOUNDS
PLANNING
REMOVAL
SEAS
SURFACE WATERS
WATER
WATER INFLUX
WATER REMOVAL
WATER WELLS
WELLS