This study is a critical review of municipal solid waste (MSW) hydraulic conductivity that includes investigation of the influence of vertical stress, dry unit weight and degradation. A total of 56 studies were compiled that included laboratory-, pilot- and landfill-scale hydraulic conductivity experiments. Compacting waste and increasing vertical stress reduce MSW hydraulic conductivity via reshaping the pore networks throughout the waste matrix, reducing the void ratio and increasing tortuosity. However, the magnitude of reduction in hydraulic conductivity is dependent on stress, waste composition and decomposition. Solid waste decomposition can have opposing effects on hydraulic conductivity. Some studies have indicated that an increase in MSW decomposition results in particle size reduction and settlement that reduces the void ratio and decreases hydraulic conductivity. Conversely, some studies indicate that waste decomposition reduces the solid mass, which increases the void ratio and creates larger flow paths that increase hydraulic conductivity. The data compilation, observations and key findings from this study are beneficial for solid waste practitioners to improve design, analysis and operation of MSW landfills.

中文翻译：

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对城市固体废物水力传导性的严格审查：小型审查。

这项研究是对城市固体废物 (MSW) 水力传导率的严格审查，包括调查垂直应力、干单位重量和降解的影响。总共编制了 56 项研究，其中包括实验室、中试和垃圾填埋场规模的水力传导率实验。压实废物和增加垂直应力可通过重塑整个废物基质的孔隙网络、降低空隙率和增加弯曲度来降低城市固体废物的水力传导率。然而，导水率降低的幅度取决于应力、废物成分和分解。固体废物分解会对水力传导率产生相反的影响。一些研究表明，城市固体废弃物分解的增加会导致颗粒尺寸减小和沉降，从而降低孔隙比并降低导水率。相反，一些研究表明，废物分解减少了固体质量，从而增加了空隙率并形成更大的流动路径，从而增加了水力传导率。本研究的数据汇编、观察结果和主要发现有利于固体废物从业者改进城市固体废物填埋场的设计、分析和运营。