Volume 29, Issue 3 (Fall 2025)
jwss 2025, 29(3): 129-144 |
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Akbarian Khalilabad A, Karami H, Mousavi S F. Temporal and Spatial Variations in Permeability and Efficiency of Artificial Recharge Basins Under Sediment-Laden Flow Conditions (Laboratory Study). jwss 2025; 29 (3) :129-144
URL: http://jstnar.iut.ac.ir/article-1-4478-en.html
URL: http://jstnar.iut.ac.ir/article-1-4478-en.html
Department of Water Engineering, Faculty of Civil Engineering, Semnan University, Semnan, Iran. , aliakbarian805@gmail.com
Abstract: (65 Views)
The reduction of soil permeability due to the sedimentation of suspended particles is a significant challenge to the efficient operation of artificial recharge systems. In this study, the effects of sediment concentration (0.5, 2, and 4 g/L), soil particle size, and vertical distribution on clogging processes were investigated using laboratory soil column experiments. The results showed a two-phase decrease in permeability: a rapid initial drop caused by the blockage of coarse pores during the first 10 minutes, followed by a second phase where the system reached a relative equilibrium. Higher sediment concentrations led to a faster decline and lower equilibrium values of permeability. Fine-grained soils, despite having lower initial permeability, demonstrated greater resistance to clogging, while coarse-grained soils experienced more severe reductions. Vertical analysis indicated that the most significant permeability loss occurred at a depth of 40-50 cm, while deeper layers showed increased permeability due to the limited penetration of suspended particles. These findings can inform the selection of appropriate materials, the design of subsurface layers in recharge basins, the prediction of system lifespan, and the regulation of sediment load in inflows to enhance the efficiency and sustainability of artificial recharge systems.
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