Numerical assessment of skimming well performance under variable design and operational parameters in the Lower Indus basin, Pakistan
Author(s)
Date Issued
March 24, 2026
Type
article
Volume
25
Issue
1
Start Page
17
End Page
28
ISSN
1644-0765
Abstract
Aim of the study
This study aimed to evaluate skimming well technology for sustainable groundwater abstraction in the Lower Indus Basin, Pakistan. It focused on how well design and operating conditions affect saltwater upconing and pumped water salinity to identify optimal configurations for sustainable freshwater extraction.
Material and methods
Using the MODFLOW-MT3D model, simulations tested single- and multi-strainer wells under varying discharge rates (5.7–8.5 l/s), penetration depths (30–60%), and pumping durations (up to 6 hours/day). The model assessed freshwater–saltwater interface movement and resulting groundwater salinity over a four-year period.
Results and conclusions
Higher discharge (8.5 l/s) caused greater saltwater upconing (~19 m). Multi-strainer wells reduced upconing and produced lower salinity (<950 mg/l) compared to single-strainer wells. The study recommends 4-strainer wells, 30–40% penetration depth, and up to 6 hours daily operation for sustainable freshwater abstraction.
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Aslam et al. 2026 Numerical assessment of skimming well performance.pdf
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