Leachate Attenuation in the Unsaturated Zone Beneath Landfills: Instrumentation and Monitoring of a Site in Southern England
Leachate Attenuation in the Unsaturated Zone Beneath Landfills: Instrumentation and Monitoring of a Site in Southern England
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垃圾填埋场下方非饱和区渗滤液衰减：英格兰南部某地点的仪器和监测
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
J. L. Lucas
中科院分区：
文献类型：
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作者：
H. Robinson;J. L. Lucas
与其他一些国家不同的是，这些国家的立法要求所有垃圾填埋场都要铺上防渗材料，而联合王国则在很大程度上依赖于渗滤液通过填埋场下面的颗粒间不饱和区渗出时污染物的衰减。许多研究报告支持这一观点，尽管近年来这些过程的有效性和可靠性一直是许多辩论的主题。本文介绍了，并提出了结果，一个主要的研究调查，已资助的英国环境部在英格兰南部的一个网站，垃圾填埋场的设计已纳入工程，半渗透衰减毯，使用当地可用的钙质砂和淤泥，已被安置到最低深度为6米以上的地下水位。1982年6月开始垃圾处理前，在该非饱和带内安装了100多个采样和监测仪器，可以采集饱和带和非饱和带的水样、非饱和带的气体样品，并测量土壤水压力、电导率和温度自该日期起每隔3个月现场测量一次。以允许监测固体废物的分解产物的移动和衰减。
Unlike a number of other countries, where legislation requires that all landfills are lined with impermeable materials, in the United Kingdom great reliance is placed upon the attenuation of contaminants which occurs as leachate seeps through intergranular unsaturated zones beneath sites. Much research has been reported which supports this view, although in recent years the effectiveness and reliability of these processes has been the subject of much debate. This paper describes, and presents results from, a major research investigation which has been funded by the United Kingdom Department of the Environment at a site in Southern England where the landfill design has incorporated an engineered, semi-permeable attenuation blanket, using locally available calcareous sands and silt, which have been emplaced to a minimum depth of 6 m above the water table. Installation of over 100 sampling and monitoring instruments within this unsaturated zone before waste disposal began in June 1982 has made it possible to obtain water samples from the saturated and unsaturated zones, gas samples from the unsaturated zone, and to measure soil water pressure, electrical conductivity, and temperature in situ, at 3 monthly intervals since this date, to allow movement and attenuation of decomposition products of solid wastes to be monitored.