北卡罗来纳州的卡里镇发现，经过精心规划的水源 保护计划可以为实际问题提供真正的解决方案。通过使 卡里的保护工作帮助建立了一个 “新”水源，使该镇推迟了未来两次扩建工厂 总共10年，以138美元/百万加仑（37美元/毫升）的成本节约用水。这 本文概述了卡里的长期节水计划及其应用 相关成本和收益。包括10个参考文献、表格和图表。

The Town of Cary, North Carolina, has found that a carefully planned water conservation program can offer real solutions to real problems. By making the most of existing water supplies, Cary's conservation efforts have helped create a "new" source of water and enabled the town to delay two future plant expansions by a total of 10 years, at a cost of $138/mil gal ($37/ML) of water saved. This paper offers an overview of Cary's long-term water conservation program and its associated costs and benefits. Includes 10 references, tables, figures.