面临原水质量恶化的饮用水处理厂的公用事业管理人员必须在该厂增加处理和推广流域最佳管理实践（BMP）之间分配资源。本文描述了一种评估点源和非点源污染对水处理操作和成本影响的方法，评估农业和城市BMP缓解这些影响的潜力，并比较流域BMP与水处理厂（WTP）增加处理的效率和成本。 筛选级流域模型用于量化在不同土地利用和BMP实施方案下输出的年度污染物负荷的变化，动态水处理厂模型用于量化日常原水水质状况的相关变化对水处理厂运营和成本的影响。集水区规模与水处理厂规模之比的数据用于确定可能受益于推广BMP的公用事业的比例。包括6个参考文献、表格、图表。

Utility managers at drinking water treatment plants faced with deteriorating raw water quality must allocate resources between increased treatment at the plant and promotion of best management practices (BMPs) in the watershed. This paper describes a methodology for evaluating the impact of point and nonpoint source pollution on water treatment operations and costs, evaluating the potential of agricultural and urban BMPs to mitigate these impacts, and comparing the efficacy and cost of BMPs in the watershed with increased treatment at the water treatment plant (WTP). A screening level watershed model was used to quantify changes in annual pollutant loads exported under varying land use and BMP implementation scenarios, and a dynamic water treatment plant model was used to quantify the impact of associated changes in daily raw water quality profiles on water treatment plant operations and costs. Data on the ratio of catchment size to WTP size was used to determine the fraction of utilities that may benefit from promotion of BMPs. Includes 6 references, tables, figures.