储存时间较长的水与味道和气味有关 问题、消毒剂残留损失和消毒副产物（DBPs）增加。 在尚普兰水区（CWD）的案例中，电厂进水口处的振荡跃层引入了浮力水 进入系统存储，可能会将较旧的水从存储区转移到分配系统中 系统CWD对竖管储罐进行了建模和重新配置，以增强 保留时间和DBP形成管理的操作方法。该项目是 旨在对竖管混合系统进行建模、设计、建造和测试。合同 计算流体动力学（CFD）建模将分层现象可视化 在现有的负浮力和等温条件下，具有更高的“气穴” DBP和较低的消毒剂残留水贯穿整个水箱，并指示 储罐内既有保留区，也有翻转区。 拟建的坦克 改造模型显示保留区可能会被消除。A. 混合系统改造为以前的单入口/出口配置。抢夺 调查和了解任何可能的周转区水质的取样计划 实施了变革。测试计划确定了HAA5、TTHMs和 在7月份的四次单独试验中，几个水箱的消毒剂残留量下降阶段 2002年，在坦克改装之前，以及2003年7月，在坦克改装之后，在类似的情况下 操作和原水DOC和温度条件。背景数据是 收集以测量储罐改造前后背景水的相似性 质量条件。包括11个参考文献、表格、图表。

Water that is retained longer within storage has been related to taste and odor problems, loss of disinfectant residual, and increased disinfection byproducts (DBPs). In Champlain Water District's (CWD's) case, an oscillating thermocline at the plant intake introduces buoyant water into system storage, possibly displacing the older water from storage into the distribution system. CWD modeled and reconfigured a standpipe storage tank to enhance our operational approach to retention time and DBP formation management. The project was intended to model, design, build and test a standpipe mixing system. Contracted computational fluid dynamic (CFD) modeling visualized that stratification would occur under existing negative buoyancy and isothermal conditions with "pockets" of higher DBP and lower disinfectant residual water throughout the tank and indicated the existence of both a retained zone, and a turnover zone within the tank. A proposed tank modification was modeled showing that the retained zone would likely be eliminated. A mixing system was retrofitted to the previous single inlet/outlet configuration. A grab sampling plan to investigate and understand any possible turnover zone water quality changes was implemented. The testing plan determined HAA5s, TTHMs, and disinfectant residuals at several tank draw down stages during four separate trials in July 2002, before tank modification, and July 2003, after tank modification, under similar operational and raw water DOC and temperature conditions. Background data was collected to gauge similarity in before and after tank modification background water quality conditions. Includes 11 references, tables, figures.