The rainwater may be stored in a co

The rainwater may be stored in a coarse gravel layer underneath the pavement or allowed to percolate into the underlying soil. Because the pavement itself acts as a retention area, it helps to prevent much of the polluted runoff that normally occurs with impervious pavements. The filtration process also helps to purify the water. As the water percolates through the open cells of the pavement, aerobic bacteria in the voids help to break down harmful pollutants and chemicals.

The rainwater may be stored in a coarse gravel layer underneath the pavement or allowed to percolate into the underlying soil. Because the pavement itself acts as a retention area, it helps to prevent much of the polluted runoff that normally occurs with impervious pavements. The filtration process also helps to purify the water. As the water percolates through the open cells of the pavement, aerobic bacteria in the voids help to break down harmful pollutants and chemicals.

The rainwater may be stored in a coarse gravel layer underneath the pavement or allowed to percolate into the underlying. Soil. Because the pavement itself acts as a, retention area it helps to prevent much of the polluted runoff that normally. Occurs with impervious pavements. The filtration process also helps to purify the water. As the water percolates through. The open cells of, the pavementAerobic bacteria in the voids help to break down harmful pollutants and chemicals.

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