drainage layer

基本解释

As landfill site working, biochemical process and seepage of leachate always affect and change drainage layer permeability.
垃圾填埋场运行过程中，渗滤液的渗流和生物化学作用，不断影响和改变着排水层的渗透性能。
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;
本发明公开了一种具有标准组合系统的屋顶花园装置，包括防水层、排水层、过滤层和基质层；
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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.
封场覆盖系统是垃圾卫生填埋场建设的重要组成部分，覆盖系统包括气体导排层、土工膜、排水层、植被表土层。