这是基于AWWA替代水价手册的四篇论文之一。作者讨论了季节性水价，它在用水高峰期确定了更高的水价。常见的季节性费率为递减块、反向块和超载结构。季节性费率结构可以帮助公用事业公司实现节约、准确反映成本，或季节性与永久性客户权益。在实施季节性费率时要考虑的因素是按季节变化的需求、系统设施的可变性、水短缺的风险、与现有关税的关系、客户影响、持续非季节性关税的后果、对收入稳定的影响以及行政问题。 根据历史背景信息，作者描述了如何建立季节性差价，重点介绍了三种常见的季节性费率以及每种费率的优缺点。手册M34，替代价格，是AWWA出版物订单号30034。

This is one of four papers based on the AWWA manual on alternative water rates. The author discusses seasonal water rates, which establish a higher price for water during a peak use season. Common seasonal rates are declining block, inverted block, and surcharge structures. Seasonal rate structures can help a utility to achieve conservation, accurate reflection of costs, or seasonal versus permanent customer equity. Factors to consider in implementing seasonal rates are variability of demand by season, variability of system facilities, risk of water shortages, relationship to the existing tariff, customer impacts, consequences of continuing the nonseasonal tariff, impact on revenue stability, and administrative issues. Following historical background information, the author describes how to establish a seasonal price differential, focusing on the three common types of seasonal rates and the advantages and disadvantages of each. Manual M34, Alternative Rates, is AWWA publication order number 30034.