drainage layer

基本解釋

As landfill site working, biochemical process and seepage of leachate always affect and change drainage layer permeability.
垃圾填埋場運行過程中，滲濾液的滲流和生物化學(xué)作用，不斷影響和改變著排水層的滲透性能。
The invention discloses a roof garden device with a standard combination system, which comprises a waterproof layer, a drainage layer, a filter layer and a substrate layer;
本發(fā)明公開了一種具有標(biāo)準(zhǔn)組合系統(tǒng)的屋頂花園裝置，包括防水層、排水層、過濾層和基質(zhì)層；
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Closure cover system is one of important parts of landfill site construction, it includes landfill gas discharge guiding layer, geotechnical film, drainage layer and plant cover surface soil layer.
封場覆蓋系統(tǒng)是垃圾衛(wèi)生填埋場建設(shè)的重要組成部分，覆蓋系統(tǒng)包括氣體導(dǎo)排層、土工膜、排水層、植被表土層。