地下隐孢子虫清除的量化对于考虑 现场河岸过滤系统的实施和/或面临污染物清除量的量化 存在地表水直接影响（GWUDI）的地下水的现场。地下的 病原体通过过滤、稀释和降解过程衰减。详细的 文献中尚未报道在该领域对这些过程的研究。实地评估 河岸滤液中的隐孢子虫要么无法检测滤液中的卵囊，要么当卵囊 检测到，报告大量清除，但未通过考虑 稀释和降解效应。实验室和色谱柱研究表明 离子强度和pH值对颗粒zeta电位和疏水性这两个重要的影响因素 多孔介质中的颗粒沉积。这些影响尚未在现场得到充分评估。A. Kitchener中快速砂滤器和河岸过滤系统的接触效率比较， 安大略省建议，河岸过滤器可以实现与收集器相同或更好的颗粒接触。 同一河岸井的离子强度表明，颗粒附着的化学条件良好 给收藏家。虽然对一系列颗粒物的理论河岸接触效能进行了计算 使用传统的物理化学过滤模型预测隐孢子虫的去除可能 由于地下的非理想沉积条件，即表面电荷和 收集器的物理不均匀性、随时间变化的沉积过程和颗粒的不确定性 由有机吸附和物理应变引起的衰减。 地下结构的检查 过滤条件表明，现场试验最适合评估河岸 过滤效果的病原体去除和优化RBF设计的低速可能是有益的 有益的 包括26个参考文献、表格和图表。

Quantification of Cryptosporidium removal in the subsurface is critical for utilities considering implementation of in situ riverbank filtration systems and/or faced with quantifying contaminant removals at sites where Ground Water Under Direct Influence (GWUDI) of surface water exists. Subsurface attenuation of pathogens occurs through filtration, dilution, and degradation processes. Detailed investigations of these processes in the field have not been reported in the literature. Field assessments of Cryptosporidium in riverbank filtrate are either unable to detect oocysts in filtrate or, when oocysts are detected, report bulk removals without assessing the true filtration of their riverbank by accounting for dilution and degradation effects. Laboratory and column investigations have characterized the effects of ionic strength and pH on particle zeta potential and hydrophobicity, two important factors that influence particle depositions in porous media. These effects have not been adequately assessed in the field. A comparison of contact efficiency between a rapid sand filter and a riverbank filter system in Kitchener, Ontario suggests that the riverbank filter may achieve the same or better particle contact with collectors. Ionic strength of the same riverbank well indicates favorable chemical conditions for particle attachment to collectors. Although a theoretical riverbank contact efficacy was calculated for a range of particle sizes, predicting Cryptosporidium removal using conventional physico-chemical filtration models may not be possible because of non-ideal deposition conditions in the subsurface, namely, surface charge and physical heterogeneity of the collectors, time-dependent deposition processes, and uncertainty in particle attenuation resulting from organic sorption and physical straining. An examination of subsurface filtration conditions indicates that in situ experimentation is most appropriate for assessing riverbank filtration efficacy for pathogen removal and that optimizing RBF design for low velocity may be beneficial. Includes 26 references, tables, figures.