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About the Model

The web-based “Water Balance Model powered by QUALHYMO” integrates the site with the watershed, stream and groundwater aquifer. This scenario comparison tool underpins Beyond the Guidebook, a provincial initiative to advance implementation of green infrastructure policies and practices throughout British Columbia.

An Overview of the QUALHYMO Engine

“Flow routing can be done by adding flows at a location, or by routing them through a stream channel. This means the engine can represent a very large number of different project situations, and the model has been used in a wide variety of coastal and inland watershed situations, including mountainous, flat, and rolling terrain with varying degrees of development. While QUALHYMO was originally written to answer watershed questions, it can address individual site processes,” explains Dr. Charles Rowney.

Beyond the Guidebook: Why the Water Balance Model Powered by QUALHYMO

Two rainfall-runoff simulation tools have been merged to create a decision support tool that integrates the site with the stream and the watershed. “To help engineers in particular go Beyond the Guidebook, we have developed an analytical methodology that connects source control evaluation with stream health assessment”, Jim Dumont explained.

“Water Balance Model powered by QUALHYMO” – A Brief History

“The Water Balance Model powered by QUALHYMO is a public domain, on-line decision support and scenario modeling tool for promoting rainwater management and stream health protection through implementation of “green” development practices. The appeal and the strength of the tool is that it is evolving to meet the “needs and wants” of participating agencies,” stated Ted van der Gulik./

Create Liveable Communities and Protect Stream Health

“The vision for the “Water Balance Model powered by QUALHYMO” – as a decision support tool that bridges engineering and planning – is that it will help communities create neighbourhoods that integrate both good planning and innovative engineering designs, for overall greater sustainability, such as minimal environmental impacts, enhanced social values, economic stability, and recreational opportunities,” stated Richard Boase.

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