AWWA IMTECH57875

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.