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首页> 外文会议>International Conference on Remediation of Chlorinated and Recalcitrant Compounds >Practical Guidelines for the Evaluation of Groundwater Quality Variability in Residential Water Wells
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Practical Guidelines for the Evaluation of Groundwater Quality Variability in Residential Water Wells

机译：住宅水井地下水质量变异性评价的实用指南

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Background. Reported changes in residential water well quality (e.g., dissolved gas concentrations, turbidity, odor) in areas of active shale gas operations have fueled significant concerns regarding the impact of shale gas extraction on surrounding drinking water resources. Given that water quality can vary substantially over time due to factors unrelated to shale gas extraction (e.g., intensity of residential water use, well construction, aquifer geochemistry, precipitation events, temperature, weather patterns, and road salting), the source(s) of observed variability in water quality is often left in question. To further complicate matters, recommended practices for baseline water quality sampling vary considerably between states and organizations, imparting additional variability on water quality analytical results. For example, recommended practices for well purging prior to sample collection range from a 5 or 15 minute purge, to purge-to-parameter stability, to three casing volumes. An improved understanding of the effect of sample methodologies and temporal variability on dissolved gas concentrations, isotopic signature, and other water quality parameters in residential water wells is needed to better differentiate sources of natural variability in residential water wells from induced variations (e.g., stray gas events).
机译：背景。报道了活跃的浇水井质量的变化（例如，溶解气体浓度，浊度，气味）在有源页岩气体作业领域促进了关于页岩气提取对周围饮用水资源的影响的重要令人担忧。鉴于水质可以随着时间的推移而变化，由于与页岩气萃取无关（例如，住宅用水，井结构，含水层地球化学，降水事件，温度，天气模式和道路盐），来源观察到的水质变异通常是有问题的。为了进一步复杂化问题，国家和组织之间的基线水质采样的推荐实践差异很大，在水质分析结果上赋予额外的变化。例如，在采样收集良好的建议范围内的推荐实践从5或15分钟吹扫，以吹扫到参数稳定，到三个壳体容积。改进了对样品方法的影响和对溶解气体浓度，同位素特征和其他水质井中的其他水质参数的影响的理解需要从诱导变化（例如，杂散气体）更好地区分住宅水井的自然变异来源（例如，杂散气体事件）。

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