A Field and Modeling Study to Determine Pesticide Occurrence in a Public Water Supply in Northern England, UK
A Field and Modeling Study to Determine Pesticide Occurrence in a Public Water Supply in Northern England, UK
复制标题
确定英国英格兰北部公共供水中农药存在的现场和模型研究
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
C. Jackson
中科院分区：
文献类型：
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作者：
M. Stuart;D. Gooddy;A. Hughes;C. Jackson
在英国，随着监测项目的发展和分析技术的完善，地下水中检测到越来越多的农药。本研究描述了在北方英格兰三叠纪砂岩含水层的一个站点的农药调查。钻探和孔隙水取样表明，在公共供水井附近的含水层非饱和区存在农业除草剂，在该供水井抽取的地下水中检测到农药浓度升高。这些化合物与在供应威尔斯井中检测到的化合物相似，但没有证据表明其中一些化合物曾在附近的农场使用过。水向威尔斯井的运动模型表明，在每月的工作周期内，各个地下水流量子集水区被保留下来，并且应该被明确定义。地下水农药污染源的探测和量化工作没有取得成功，这可能是由于当地土地使用和含水层的异质性。即使在整个集水区很小（半径为1公里）并且显然几乎没有可能的点源的情况下，这仍然很困难。即使有复杂的流动模型，在模拟农药移动方面仍然存在高度的不确定性，地下水处理可能是供水设施唯一可行的选择。
In the UK, increasing numbers of pesticides are being detected in ground water as monitoring programs are developed and analytic techniques are refined. This study describes the investigation of pesticides at a site on the Triassic Sandstone aquifer of northern England. Drilling and pore water sampling demonstrated the presence of agricultural herbicides in the unsaturated zone of the aquifer close to a public supply well site at which elevated pesticide concentrations had been detected in the abstracted ground water. These were similar to the compounds detected in the supply wells, but there was no evidence for some of these having been used at the nearby farm. Modeling of water movement to wells showed that individual ground water flow subcatchments were retained during a monthly duty cycle and should be well‐defined. Detecting and quantifying the sources of pesticide pollution of ground water was unsuccessful, probably due to local land use and aquifer heterogeneity. This remains difficult even where the overall catchment is small (1‐km radius) and there are apparently few possible point sources. Even with sophisticated flow models, there is still a high degree of uncertainty in modeling pesticide movement, and treatment of ground water may be the only viable option for water utilities.
影响因子：
2
作者：
Mrotek,LeighA;Gielen,CCAM;Flanders,Martha
通讯作者：
Flanders,Martha