发展中国家面临着维持水资源的问题 资源和建立适当的交付系统 重要的是分析历史数据以确定实际 使用水平。然而，在许多发展中国家 没有保持必要的详细程度。因此 特别重要的是要考虑到 可能会影响使用率。 本文探讨了水的使用趋势是如何针对当地居民的 假设人均利率 例如，在美国，发展中国家也将实现这一目标 国家可能会导致过度开发的系统。证据是 考虑到总估算的次数 基于假定增长系数和 这些假设可能是不正确的。 本文确定了随着时间的推移，水资源使用的实际变化 并为一系列消费者提供实际用水数据 部门协助规划需求。 文章还探讨了 水费对生活用水的影响。包括20个参考文献、表格和图表。

As developing countries are faced with maintaining water resources and building adequate delivery systems, it is important to analyze historical data to determine actual levels of use. In many developing countries, however, records with the necessary level of detail have not been maintained. Therefore, it is especially important to account for a variety of factors that may influence usage rates. This paper explores how water use trends are specific to local conditions and how making the assumption that per-capita rates in the United States, for example, will also be achieved in developing nations can lead to overdeveloped systems. Evidence is given regarding how many times gross estimates are made of future water demand based on assumed increase factors and ways in which these assumptions can be incorrect. This article identifies actual changes in water use over time and provides actual water use data for a range of consumer sectors to assist in planning demand. The article also examines the impact of water cost on domestic use. Includes 20 references, tables, figures.