We study water management in the context of a prototypical water economy containing the main water sources and user sectors. A water policy consists of water allocation from each source to each user sector at each point of time as well as the capital investments needed to carry out these allocations. We show that the optimal policy brings the water capital stocks (infrastructure and equipment) to well-specified turnpike processes as rapidly as possible and evolves along these turnpikes thereafter, eventually converging to a unique steady state. Implications for water pricing, as well as for the timing and extent of recycling and desalination activities, are discussed.

中文翻译：

---

水政策准则：综合方法

我们在包含主要水源和用户部门的原型水经济环境下研究水管理。水政策包括在每个时间点从每个水源到每个用户部门的水分配以及进行这些分配所需的资本投资。我们表明，最佳政策会尽快将水资本存量（基础设施和设备）带入特定的收费桩流程，然后沿着这些收费桩发展，最终收敛到唯一的稳定状态。讨论了对水价以及回收和淡化活动的时间和范围的影响。