本海报展示了大辛辛那提水厂（GCWW）配水系统的全管道模型，可用于水力和水质建模。水质模拟将用于确定配水系统内的水源、水龄、游离余氯和三卤甲烷。该模型将成为GCWW评估配水系统未来运行以实现最佳水质的有用工具。现场测试程序的目的是获取数据，以确定配水系统模型中氯壁衰减系数的分配。现场测试项目涉及对190个地点的游离氯残留进行临时监测，这些地点在分配系统中分为五个区域。 2007年夏季和秋季，在五个区域的每个区域内安装了38个临时游离氯监测器，为期约一周。监测地点每两天进行一次数据收集和监测维护。正在对收集的数据进行分析，并将其作为配水系统模型氯气校准的基础。

This poster paper presents an all-pipes model of the Greater Cincinnati Water Works (GCWW) distribution system that can be used for both hydraulic and water quality modeling. Water quality simulations will be used for determining source of water, water age, free chlorine residual and trihalomethanes within the distribution system. The model will be a useful tool as GCWW evaluates the future operation of the water distribution system in order to achieve optimal water quality. The purpose of the field testing program was to obtain data for determining the assignment of chlorine wall decay coefficients within the water distribution system model. The field testing program involved the temporary monitoring of free chlorine residuals at 190 locations, which were divided into five areas in the distribution system. During the summer and fall of 2007, 38 temporary free chlorine monitors were installed for a period of about one week within each of the five areas. The monitoring locations were visited every two days for data collection and monitor maintenance. The collected data is being analyzed and will be the basis for chlorine calibration of the distribution system model.