在持续增长的地区，水资源管理变得越来越复杂 发展导致对有限资源——水——的竞争加剧。增长的 对供水的需求加剧了对新水源和管理方法的需求 需求，如保护或通过使用 再生水（再利用）。同时，从流域的角度来看，环境需求 例如河流中的水流通常被认为是为了争夺水资源。进一步的 由于全球气候变化的影响，一些地区可能会出现并发症 随着时间和/或降水频率的变化，改变降水量、时间和形式 极端事件。这些动态突出了环境要素之间复杂的相互关系 陆地水循环和由此产生的水管理复杂性，包括水源， 供应、需求、处理、再利用，并再次回到源头。 圣约翰河水管理区（SJRWMD）、JEA和克莱县公用事业公司 佛罗里达州管理局（CCUA）目前正在参与关键的规划和许可工作 用于供水和废水的综合管理。本文概述了这一过程 全面水资源管理，并介绍该流程在项目选择中的应用 基于决策和优化模型框架，开发能够促进 水的再利用，将废水基础设施开发成本降至最低，增加供水 并有助于达到水质标准。包括表格、数字。

Managing water resources is becoming increasingly complex in regions with continued growth and development resulting in increased competition for a finite resource, water. Growing demands for water supply intensify the need for new sources as well as approaches to manage demand such as conservation or to replace supply for non-potable demands through use of reclaimed water (reuse). At the same time, from a watershed perspective, environmental needs such as in-stream flows often are considered to compete for water resources. Further complications are predicted in some areas due to influences of global climate change which may change the amount, timing, and form of precipitation over time and/or the frequency of extreme events. These dynamics highlight complex inter-relationships among the elements of the terrestrial water cycle and the resulting complexity of water management, including source, supply, demands, treatment, reuse, and back to source again. The St. Johns River Water Management District (SJRWMD), JEA and Clay County Utility Authority (CCUA) in Florida are currently involved in critical planning and permitting efforts for integrated management of water supplies and wastewater. This paper outlines the process of Total Water Management and presents the application of this process for selecting the projects based on the decision and optimization model framework to develop projects that would promote water reuse, minimize costs for wastewater infrastructure development, augment water supply and help in achieving water quality standards. Includes tables, figures.