Underground pollution travel from leach pits of on-site sanitation facilities: a case study
Underground pollution travel from leach pits of on-site sanitation facilities: a case study
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DOI：
10.1007/s10098-010-0331-3
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发表时间：
2011-06-01
影响因子：
4.3
通讯作者：
Banerjee, Goutam
中科院分区：
文献类型：
--
作者：
Banerjee, Goutam
在西孟加拉（印度）的一些地点，在不同的水文地质条件下进行了一项长期实地研究，以了解地下污染移动现象，并评估水源与现场卫生沥滤坑的安全水平距离。研究表明，污染物从沥滤坑，在水平和垂直方向上，是取决于土壤类型，渗透性，水力梯度，粒度，地下水位相对于沥滤坑的位置。污染物的最小行程的2.055米，发现在粘土粉土，而最大行程的10.20米的砾石砂组成的土壤中观察到在10天内。研究还表明，沥滤坑周围的粘土包裹物在很大程度上阻止了污染物（化学和细菌）的移动。在本研究中，图解技术已被建议用于估计地下旅行的细菌污染在给定的土壤成分。
A long-term field study was undertaken under different hydro-geological conditions at some locations of the state of West Bengal (India) to understand the phenomenon of underground pollution movement, and to assess safe horizontal distance of water sources from on-site sanitation leach pits. The study showed that pollution travel from leach pits, both in horizontal and vertical directions, is dependent on soil type, permeability, hydraulic gradient, grain size, and position of groundwater table with respect to the leach pits. A minimum travel of pollutant of 2.055 m was found in clayey silt soil, whereas a maximum travel of 10.20 m was observed in gravel-sand composition of soils in 10-day period. The study also demonstrated that clay envelop around leach pit arrests the movement of pollutant (both chemical and bacteriological) to a considerable extent. In the present study, graphical technique has been suggested for estimating underground travel of bacteriological contamination under given soil composition.