Infiltration System Design

Although sprinklers and subsurface perforated pipe may be used for distribution, the most common method is shallow level spreading basins. Gravity distribution is used through pipes or ditches, and the basins are divided by berms to allow periodic drying and scarification of the basin surface. The number of basins depends on the site topography, hydraulic loading cycle, and wastewater flow. For small systems, the basins are generally 0.5 to 2 ac in size. The minimum number of basins is typically 3 to 4 and may be as many as 10 to 15, depending on the loading cycle (Reed and Crites, 1984).

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