北卡罗来纳州罗利市的历史水质达标数据显示，夏季是水质达标的高峰期 消毒副产物（DBP）水平升高和分配系统（DS）大肠菌群暴发的季节。高耗水量， 然而，它有助于冲洗系统，从而限制水质恶化，从而 由于水温高而加速。随着节水措施的实施，水资源将 夏季在DS停留的时间比之前温暖的天气季节更长。这 可能会使DBP的形成超出监管水平，导致氯胺 残留量低于抑制大肠菌群生长的最低有效水平，以及 为铅和铜浸出到水中提供理想的腐蚀环境。 评估节水对DS水质的影响对于确保 该市遵守联邦和州法规。地理信息系统（GIS）集成计算机 开发该模型是为了帮助评估节水对水质的影响。 该模型已成功地应用于近期的总体规划和IDSE研究中，并取得了良好的效果 卓越的需求分析、水力模拟和水龄功能 分析该研究首先评估了水资源保护规则对总水量的有效性 节省物每月的水费账单记录被收集，并被地理编码到GIS中 数据库。生成了GIS地图，以说明每个服务区的需求变化 节约用水之后。该研究还调查了节水的影响 影响DS中水龄变化的日常用水模式。白天的 每个压力区的需求曲线是根据每小时的监控和数据采集（SCADA）记录计算的 典型的手术日。 利用该模型模拟了水源涵养后DS的水龄变化 具有更新需求、日变化曲线和操作方法的模型。有 水龄显著增加被确定为饮用水的高危地点 节水实施后的违规行为。水质 根据建模结果提出了改进措施。 改进的重点是 对系统进行改造以产生更多再循环，这将是一种更具成本效益的方法 方法比冲洗更有效，尤其是在干旱期间。包括2个参考文献、表格和图表。

The city of Raleigh, North Carolina's historical water quality compliance data has revealed that summer is the peak season for elevated disinfection byproduct (DBP) levels and coliform outbreaks in the distribution systems (DS). The high water usage, however, helps flush the system, thus limiting the water quality deterioration which accelerated by the high water temperature. With water conservation enforced, water will stay longer in the DS in the summer season than previous warm weather seasons. This may extend the formation of DBPs beyond the regulation levels, lead the chloramine residual below the minimum effectiveness level to suppress coliform growth, as well as provide an ideal corrosion environment for lead and copper leaching into water. Evaluation of impacts of water conservation on water quality in the DS is essential to ensure the city complies with the federal and state regulations. A geographic information system- (GIS-)integrated computer model was developed to help assess the effects of water conservation on water quality. The model has been used successfully in recent master planning and IDSE study, with its exceptional functionality for demand analysis, hydraulic simulation and water age analysis. The study first evaluated the effectiveness of the water conservation rules on total water savings. The monthly water billing records were collected and geocoded into GIS databases. GIS maps were generated to illustrate the demand change in each service area after water conservation. The study also investigated the influence of water conservation on daily water usage patterns, which affects water age variation in the DS. The diurnal demand curve for each pressure zone was calculated based on hourly supervisory control and data acquisition (SCADA) records in a typical operation day. The change of water age in the DS after the water conservation was simulated using the model with the updated demand, diurnal curves and operation methods. The areas with significant water age increase were identified as the high-risk locations of drinking water regulation violations after implementation of water conservation. Water quality improvements were proposed based on the modeling results. The improvements focused on system modifications to generate more recirculation which would be a more cost-effective method than flushing, especially during the drought. Includes 2 references, table, figures.