An analytical method to determine ground water supply well network designs

Area of Science:

• Hydrogeology
• Water Resource Management
• Aquifer Engineering

Background:

• Determining optimal well network design is critical for sustainable groundwater extraction.
• Existing methods may lack efficiency or direct applicability for rapid network sizing and spacing.
• Aquifer mining, or over-extraction, poses significant environmental and resource risks.

Purpose of the Study:

• To develop a rapid analytical method for calculating the required number and spacing of wells in a network.
• To establish parameters that link theoretical drawdown to sustainable extraction limits.
• To provide a tool for groundwater practitioners to design efficient well networks for confined aquifers.

Main Methods:

• Derivation of two new parameters relating theoretical drawdown to maximum achievable drawdown without aquifer mining.
• Analysis of the proportionality between network size, groundwater demand, transmissivity, and available head.
• Investigation of well spacing sensitivity to a parameter derived from available head and drawdown propagation.

Main Results:

• Well network size is directly proportional to groundwater demand and inversely proportional to transmissivity and available head.
• Well spacing is highly sensitive to a parameter incorporating available head and drawdown propagation from a single theoretical well.
• The method provides a quick estimation tool for well network design in confined, leakance-free aquifers.

Conclusions:

• The developed analytical method offers an efficient approach for designing groundwater well networks.
• The method facilitates the determination of sustainable well yields and optimal spacing, preventing aquifer mining.
• This tool is valuable for groundwater practitioners managing water resources in confined aquifer systems.