对饮用水次级流域污染物水平和来源的调查 进行了水库蓄水试验。这个饮用水系统在地表下有一个过滤系统 水处理规则。作为维护该过滤豁免的一部分，管理实用程序 制定了本研究支持的主动流域管理计划。这个项目 开始评估次级流域内的污染物来源，以便控制活动 可以开发。设计了一个全年抽样方案，以隔离该区域内的土地利用 次级流域。对抓取的样本进行了13项水质参数分析，其中包括3项 微生物来源追踪指标。进行统计分析以确定 参数提供了关于污染源的最有意义的信息，包括 季节变化、降水影响和土地利用影响。总体而言，利用多重 采用传统和微生物源跟踪测量的采样点方法提供了见解 研究子流域的水质动态。包括4个参考文献、表格。

An investigation into the levels and sources of pollutants to a subwatershed of a drinking water reservoir was conducted. This drinking water system has a filtration waiver under the Surface Water Treatment Rule. As part of maintaining this filtration waiver, the managing utility has developed a proactive watershed management program which this research supports. This project was initiated to assess sources of pollutants within the subwatershed so that control activities could be developed. A year-round sampling program was designed to isolate land uses within the subwatershed. Grab samples were analyzed for thirteen water quality parameters, including three microbial source tracking indicators. Statistical analyses were conducted to determine which parameters provided the most meaningful information on pollution sources, accounting for seasonal variations, precipitation affects, and land use impacts. Overall, utilizing a multiple sampling site approach with traditional and microbial source tracking measures provided insights into the water quality dynamics of the subwatershed. Includes 4 references, tables.