Clogging Sample Clauses

Clogging. The formation of a clogging layer on the surface of infiltration ponds is a common occurrence along the wetted perimeter. Clogging may be caused by the accumulation of silt, clay, or other fine material that was suspended in the water entering the recharge basin, by algae growth on the bottom or in the water, by precipitation of calcium carbonate in the water due to increases in pH caused by algae activity, and by biological activity on the wetted perimeter (Bouwer and Rice, 1989). Xxxxxxx et al. (1992) used a two-dimensional unsaturated flow model to investigate the influence of clogging on the performance of an infiltration trench. They found that placing a 2 inch-thick (5 cm) layer of soil with a low hydraulic conductivity at the bottom of the trench reduced the infiltration rate by 20 percent, 7 percent, and 4 percent for depths of water in the trench of 0.8 ft (0.25 m), 1.6 ft (0.50 m), and 3.3 ft (1.0 m), respectively. Field observations have shown that the formation of a relatively thin clogging layer on the surface of the soils may reduce infiltration rates significantly more than what was shown with the numerical model (Schuh, 1990). These reductions may be due to pore clogging that occurs more deeply than the 2 inches assumed in the numerical model.
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