供水商面临着提供清洁水以满足其选民需求的艰巨任务。通常，必须扩建现有设施，以增加日常用水和消防用水。其他设施可能需要升级，以满足更严格的水质法规。本文重点介绍了马里兰州贝尔茨维尔一座有50年历史的水处理和分配系统的规划和设计改进。结合CYBERNET软件的系统水力模型揭示了需要改进的领域，包括:低压区、低流量区、下落不明的水、变质的储存设施和成品水储存不足。 建议对配水系统进行的改进包括清洁和铺设近3000英尺的现有8英寸水管，以及安装6英里以上的8英寸至16英寸球墨铸铁配水主管。下落不明的水对该设施意义重大。一项泄漏检测计划发现每天有超过53000加仑的泄漏。关于储存系统的建议建议包括修复三个高架储水箱，以及建造新的30万加仑成品储水箱。完成了环境评估和考古调查，以协助修复工作。 工厂的改进预计将于1998年完成。

Water purveyors face the demanding task of supplying clean water to satisfy the demands of their constituents. Often, existing facilities must be expanded to increase the amount of water available for daily use and for fire protection. Other facilities may require upgrading to meet more stringent water quality regulations. This paper focuses on the planning and design of improvements to a 50-year old water treatment and distribution system located in Beltsville, Maryland. A hydraulic model of the system incorporating CYBERNET software revealed areas needing improvement including: low pressure areas, low flow areas, unaccounted-for water, deteriorated storage facilities, and insufficient finished water storage. The recommended improvements to the distribution system included cleaning and lining of nearly 3,000 feet of existing 8 inch water mains and the installation of over 6 miles of 8 inch to 16 inch ductile iron water distribution mains. Unaccounted-for water was significant for the facility. A leak detection program identified over 53,000 gallons per day of leaks. Recommendations for the storage system proposed the rehabilitation of three elevated water storage tanks and the construction of new 300,000 gallon finished water storage tank. An environmental assessment and an archaeological survey were completed to aid in the rehabilitation. The plant improvements are expected to be completed in 1998.