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

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

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Abstract

都市部で不透水性舗装が増えるにづれて, 水の土壌への浸透が少なくなり都市樹木の生育不良の一因となっているが, これを解決する手段の一つとして透水性舗装が注目されている。本研究では, 透水性舗装が植栽土壌や植物の生育に及ぼす効果を知るために, コンテナーに土壌を入れ, その上に透水性舗装盤とコンクリート舗装盤を設置した実験装置を作り, 比較実験を行った。その結果, 透水性舗装下の土壌の含水比は高く, 隣接部の芝草の生育量 (現存量) もコンクリート舗装隣接部に比べて高い結果が得られた。透水性舗装は透水が良好で舗装面からの水の蒸発が少ない利点があるが, 一方では実験期間中に下層土が過湿になる危険性も観察された。

English 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.