Adding Water Model Data to your GIS

What is a water model?

A water model is a powerful tool that can help your team:

  • Better understand your water system and its demands, pressures, and flow capacities

  • Evaluate your system’s water age

  • Develop efficient design and location alternatives for new structures

  • Evaluate the performance of existing structures

  • Plan for future development expansions and increased water demands

  • Design flushing programs

By integrating your community’s water model data into your GIS, your team will be better equipped to use and analyze this data when necessary. For example, you’ll be able to more efficiently field questions from developers on available water and compare field flow test results to anticipated flow in your water model, which may be able to help identify closed valves or failing structures.

The following are examples of water model data that can be integrated into GIS:

Available Fire Flow

The available fire flow is the maximum flow that can be provided at individual hydrants while maintaining a minimum pressure of 20 PSI in the system.

Residual Pressure

The residual pressure is the anticipated pressure at the hydrant when delivering the available fire flow.

Static Pressure

Static pressure is the pressure at a point when there is no flow in the system.

Critical Point

Critical points are locations in the water system where residual pressures would drop below 20 PSI if fire flows would exceed the calculated available fire flow rate.

Water Age

Water age is the time it takes for water to travel from the source to the consumer.


If you’re interested in learning more about how Ruekert & MIelke, Inc. and AssetAlly can help your community develop a water model and/or integrate your water model data into your GIS, please contact one of our experts today!