Abstract
This research investigated the transient saltwater upconing in response to pumping from a well in a laboratory-scale coastal aquifer. Laboratory experiments were completed in a 2D flow tank for a homogeneous aquifer where the time evolution of the saltwater wedge was analysed during the upconing and the receding phase. The SEAWAT code was used for validation purposes and to thereafter examine the sensitivity of the critical pumping rate and the critical time (the time needed for the saltwater to reach the well) to the well design and hydrogeological parameters. Results showed that the critical pumping rate and the critical time were more sensitive to the variations of the well location than the well depth. The critical time increased with increasing the location and depth ratios following a relatively linear equation. For all the configurations tested, the lowest critical pumping rate was found for the lower hydraulic conductivity, which reflects the vulnerability of low permeability aquifers to salinization of pumping wells. In addition, higher saltwater densities led to smaller critical pumping rate and shorter critical time. The influence of the saltwater density on the critical time was more significant for wells located farther away from the initial position of the interface. Moreover, increasing the dispersivity induced negligible effects on the critical pumping rate, but reduced the critical time for a fixed pumping rate.
Original language | English |
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Journal | Water Resources Management |
Early online date | 28 Jun 2018 |
DOIs | |
Publication status | Early online date - 28 Jun 2018 |
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Dive into the research topics of 'Transient Investigation of the Critical Abstraction Rates in Coastal Aquifers: Numerical and Experimental Study'. Together they form a unique fingerprint.Student theses
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The use of subsurface physical barriers to control seawater intrusion in heterogeneous coastal aquifers : Experimental and numerical study
Abdoulhalik, A. (Author), Ahmed, A. (Supervisor), Moutari, S. (Supervisor) & Hamill, G. (Supervisor), Dec 2017Student thesis: Doctoral Thesis › Doctor of Philosophy
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