Champlain Water District（CWD）取水口位于佛蒙特州西北部Champlain湖Shelburne Bay北部航道约75英尺深处，离岸2480英尺。1997年7月至1998年6月，在靠近进水口的一个系泊处收集了海流和温度剖面。从1996年开始，每周对微生物样本进行大肠杆菌分析。这种采样导致在1997年秋季和1998年春季采集原水微生物源追踪（MST）样本。还定期获取原水浊度数据。从进气管西南30米处获得的海流和温度数据记录了大约一天时间内存在的内部驻波（seiche）。 这与中央主湖主要的单峰内部地震形成强烈对比，其周期约为4.3天。温度数据表明，在5月至10月期间，CWD取水口偶尔会受到更温暖的地表水的影响，金属离子（温跃层）在10月中旬逐渐降至取水水平以下。通过长达一年的观察，我们了解了进入进水管的水源水的动态和质量，以确保在原水水质异常波动期间进行主动处理。在水源动力学培训中，CWD处理专家使用天气预报和原水温度来预测取水口的卫生和浊度影响。 未来的实践应包括:在线监测温跃层水平和径流密度；以及减少卫生和浊度源的影响。由于发现了影响谢尔伯恩湾的较小地震，源头保护区的范围从整个湖泊缩小到了当地谢尔伯恩湾，可能还有伯灵顿湾的影响。包括22个参考文献、表格和图表。

The Champlain Water District (CWD) intake is positioned 2480 feet offshore at a depth of approximately 75 feet in the northern channel of Lake Champlain's Shelburne Bay in Northwestern Vermont. Current and temperature profiles were gathered from July 1997 to June 1998 at one mooring in close proximity to the intake. Weekly microbial samples were analyzed for E. coli beginning in 1996. This sampling led to raw water microbial source tracking (MST) samples being collected during fall 1997 and spring 1998. Raw water turbidity data were also routinely obtained. Current and temperature data obtained 30 meters to the southwest of the intake pipe documented the presence of an interanl standing wave (seiche) with a period of approximately one day. This was in strong contrast to the dominant unimodal internal seiche of the central main lake with a period of approximately 4.3 days. Temperature data indicated that the CWD intake was occasionally impacted by warmer surface waters during May-October and that the metalimnion (thermocline) gradually dropped below the intake level in mid-October. Year-long observations created an understanding of the dynamics and quality of source water entering the intake pipe to ensure proactive treatment during unusual raw water quality fluctuations. Ater source dynamics training, CWD Treatment Specialists use weather forecasts and raw water temperature to predict sanitary and turbidity impacts at the intake. Future practices should include: online monitoring of the thermocline level and runoff density; and reducing the impact of sanitary and turbidity sources. Due to the discovery of the smaller seiche that affects Shelburne Bay, source protection area delineation has been narrowed from the entire lake to local Shelburn Bay and, possibly, Burlington Bay impacts. Includes 22 references, tables, figures.