Changes in waste management policy affect the settlement characteristics of waste landfills in which the waste disposal is operated for decades. In this study, the waste settlements were calculated by using the data measured in two multi-staged landfills for 27 years. The relationship between the changes in waste management policies and settlement characteristics is analyzed. Sequentially launched waste management policies reduced the organic matters in municipal solid waste (MSW) of the landfill. This change in turn influenced the engineering properties of landfill waste, e.g. water content, unit weight, and initial void ratio, etc. Due to the reduction of food waste in landfills, the water content decreased and the unit weight increased. The initial void ratio declined by the decrease of water content and the increase of unit weight. The annual primary and secondary compression indices, C_c and C_α, of each lift also increased/decreased due to the change in waste composition. The C_c of Phase #1 increased from an average of 0.34 to an average of 0.51 because the percentage of coal ash in MSW drastically decreased and the percentage of food, paper, and plastic, which are highly compressible, increased. On the other hand, the C_c of Phase #2 declined from an average of 0.15 to an average of 0.025 due to the decrease of the waste compressibility from the reduction of organic matters. The C_α of Phase #1 and #2 decreased by the reduction of organic matter and moisture which are needed for biodegradation of wastes in the landfill.

废物管理政策的变化会影响垃圾填埋场的沉降特征，在这些垃圾填埋场中进行了数十年的废物处理。在这项研究中，废物沉降是通过使用在两个多阶段垃圾填埋场 27 年中测量的数据来计算的。分析了废物管理政策的变化与聚落特征之间的关系。相继推出的废物管理政策减少了垃圾填埋场城市固体废物 (MSW) 中的有机物。这种变化反过来又影响了填埋垃圾的工程性质，如含水量、单位重量和初始空隙率等。由于垃圾填埋场食物垃圾的减少，水分含量降低，单位重量增加。初始空隙率随着含水量的减少和单位重量的增加而下降。由于废物成分的变化，每次提升的C _c和C _α也增加/减少。第 1 阶段的C _c从平均 0.34 增加到平均 0.51，因为 MSW 中煤灰的百分比急剧下降，而高度可压缩的食物、纸张和塑料的百分比增加。另一方面，由于有机物减少导致废物可压缩性降低，第 2 相的C _c从平均 0.15 下降到平均 0.025。第 1 阶段和第 2 阶段的C _α由于减少了垃圾填埋场中废物生物降解所需的有机物和水分而降低。