Infiltration
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Infiltration of rainwater: Infiltration is the soaking of rainwater into the ground via infiltration basins. Infiltration restores natural hydrologic processes and addresses in addition to flooding and erosion also water quality, groundwater and water supplies. Almost always the water quality is improved by the filtration and transformation processes in the soil. There are a number of possibilities for decentralised or on-site infiltration systems, which are described in the following section. It should be noted that often combinations of the different systems are used.
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