水资源保护，或水需求管理，发生在最终使用水平。为了评估需求管理计划，必须将城市地区的总供水量分解为其空间、时间、部门和功能（或最终用途）组成部分。本文介绍了最终用途核算方法在制定长期分类用水需求预测方面的作用。通过最新的水需求分析和最终用途估算方法，对水资源需求进行了分类。

Water conservation, or water demand management, occurs at the end use level. In order to evaluate demand management programs, the total delivery of water to urban areas must be disaggregated into its spatial, temporal, sectoral and functional (or end use) components. This paper presents the power of the end use accounting approach for developing long-term disaggregated water demand forecasts. The end use accounting approach provides a state-of-the-art analysis tool for estimating water use by end use purpose and for forecasting disaggregated water demand from estimates of end use demand.