The Effect of Permeable Pavement on the Soil Water and the Growth of a Grass

Abstract

The increase of the rate of paving roads has caused the obstruction to permiate rainwater in soil. As the result, it has prevented growth of street trees. As one of the means that solves this problem, the permeable pavement attracts our attention.
In this reserch, we put soil in a container, made some testing areas setting a board of concrete and of permeable pavement, and made a comparative experiment to investigate how many the permeable pavement had effects on the water content of soil and on the growth of “Kentucky Bluegrass”(Poa pratensisL.).
As the result, the water content of soil surfaced with permeable pavement increased and the biomass of grass bordering on it increased more than that of grass bordering on concrete pavement. The effect, as mentioned above, was recognized, furthermore, the permeable pavement decreased the amount of evaporation of water from its surface. But it was guessed that soil under it was in danger of the excess of soil water in the rainy seasen of Japan.