拟议的地下水消毒规则草案（GWDR）将免除一些公共供水系统的消毒，前提是它们能够证明在潜在粪便污染源和水井之间进行了充分的“自然消毒”。确定这一点的一种方法是使用病毒传输模型，如VIRALT，该模型是为美国环境保护署地下水和饮用水办公室开发的。在这项研究中，对几个记录了地下水病毒污染的地点进行了检查。从这些地点获得了必要的水文地质和微生物数据，并将其用作VIRALT的输入值。然后将该模型的预测结果与现场井中测得的病毒浓度进行比较。 研究发现，该模型通常低估了水井中的病毒浓度。敏感性分析表明，该模型对病毒吸附系数和病毒灭活率非常敏感。包括10个参考文献、表格和图表。

The draft proposed Groundwater Disinfection Rule (GWDR) will exempt some public water supply systems from disinfecting if they can demonstrate that adequate "natural disinfection" occurs between potential sources of fecal contamination and wells. One way to determine that is to use a virus transport model such as VIRALT, which was developed for the Office of Groundwater and Drinking Water of the US Environmental Protection Agency. For this study, several sites were examined where virus contamination of groundwater has been documented. The necessary hydrogeologic and microbiological data from these sites were obtained and used as input values for VIRALT. The model's predictions were then compared with the measured virus concentrations in wells at the sites. It was found that the model generally underpredicted the virus concentration at the wells. A sensitivity analysis revealed that the model is extremely sensitive to the value of the virus adsorption coefficient and the virus inactivation rate. Includes 10 references, tables, figures.