本文报告了从1977年开始的一项为期五年的监测计划的结果，该计划对俄勒冈州波特兰市供水水源布尔伦河流域的水质进行了监测。城市流域有限的土地利用、圣海伦斯山火山活动、附生植物、悬浮沉积物、河流温度和电导率的影响都包括在内。包括8个参考文献、表格、图表。

This article reports on results of a five-year monitoring program begun in 1977 on water quality in the Bull Run River basin, source of the Portland, Oregon water supply. Limited land use of the municipal watershed, the effects of Mount St. Helens' volcanic activity, periphyton, suspended sediment, stream temperatures, and specific conductance are covered. Includes 8 references, table, figures.