Simulation of hydrosalinity behavior under skimming wells
2004
Saeed, M.M. | Bruen, M.
The movement of underlying saline water in response to freshwater abstraction in fresh-saline aquifers is dependent upon aquifer properties, well design and operational plans. The responses of these factors under various well configurations and pumping modes are important for sustainable freshwater abstraction. In the present study, three shallow skimming wells with different well configurations were monitored under different pumping modes in the Indus basin of Pakistan. The field data were used to calibrate MODFLOW and MT3D models for each well system. The results showed that the selected models have the capability to simulate both the continuous and intermittent pumping operations in skimming wells. The calibrated models were used to evaluate the sensitivity of various aquifers, well design, and operational parameters. Hydrosalinity of the pumped water increased with the increase in vertical hydraulic conductivity, longitudinal dispersivity, well abstraction rate, well penetration ratio, and pumping duration; while increase in horizontal hydraulic conductivity, effective porosity, specific yield, freshwater recharge, transverse dispersivity, and number of boreholes in multi-borehole skimming wells decreased the salinity of the pumped water.
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