填埋场水分运移模拟实验研究

时间:2023-04-25 22:23:13 环境保护论文 我要投稿
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填埋场水分运移模拟实验研究

摘要: 在实验室中建立了一个具有填埋场典型构造的单元隔室系统,研究了盖层渗透性较强而衬层渗透性较弱和盖层、衬层渗透性均较弱两种不同防渗配置下系统内的水分运移规律。两种情况下,盖层底部与废物层交界处始终处于非饱和状态,造成通过盖层的水分入渗速率远远大于其设计入渗能力(渗透系数),反映了强透水的废物层对盖层防渗性能的不利影响。两种配置在防止渗滤液穿透衬层而污染“地下水”方面并无显著差异,其效率高低主要取决于介于废物层与衬层之间的排水层工作性能的优劣。 Abstract: A laboratory scale model with typical landfill structures wasbuilt to simulate water movement in a landfill with either a medium-permeability cover and a low-permeability liner or both low-permeability cover and liner. In both circumstances, the interface between the cover and the underlying waste was not saturated during the experiment, which results in a much higher infiltration rate through the liner than its designed infiltration capacity (permeability). The results show that high-permeability waste negatively impact on the cover. There is no significant difference in the groundwater pollution due to the leachate for the two cases. The leachate control effectiveness depends mainly on the performance of the drainage layer between the waste and the liner. 作 者: 刘建国    聂永丰    王洪涛   作者单位: 清华大学环境科学与工程系,北京 100084  期 刊: 清华大学学报(自然科学版)  ISTICEIPKU   Journal: JOURNAL OF TSINGHUA UNIVERSITY(SCIENCE AND TECHNOLOGY)  年,卷(期): 2001, 41(4_5)  分类号: X705 TU411.4  关键词: 填埋场    水分运移    土水剖面    渗滤液    入渗速率    顶部盖层    Keywords: landfill    water movement    soil water profile    leachate    infiltration rate    surface cover   

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