本文介绍了几个涉及连接独立水系统的水力建模项目。这些项目分析了应急供水来源，并探讨了区域供水系统的可行性。本文回顾了组合模型中的典型问题，如不兼容或不一致的数据和软件限制。其他主题包括处理大量生产源和高位储罐的建模技术，以及对这两个系统都有利的设计考虑。示例说明了限制系统间流量的各种因素，包括电厂容量、泵性能和压力限制。其他例子表明，从一个来源获得应急供应可能会影响其他供应点的可用流量。案例研究说明了系统间连接建模的常见问题。本文讨论了综合模型的价值，以及区域应急供水规划方法的益处。

This paper describes several hydraulic modeling projects that involved connecting separate water systems. These projects analyzed emergency supply sources and explored the feasibility of regional water systems. The paper reviews typical problems in combining models, such as incompatible or inconsistent data and software limitations. Additional topics include modeling techniques to handle numerous production sources and elevated tanks, as well as design considerations that are advantageous to both systems. Examples demonstrate various factors that limit flow between systems, including plant capacity, pump performance and pressure constraints. Other examples show how obtaining an emergency supply from one source might affect the available flow from other supply points. Case studies illustrate common issues with modeling connections between systems. The paper discusses the value of combining models in general and the benefits of a regional approach to planning for emergency water supplies.