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Understanding stormwater: a vital component in urban engineering
Stormwater is rainfall that does not soak into the ground. In natural catchments most rain is absorbed; in cities, roofs, roads and car parks turn a large share of it into runoff that arrives quickly and in volume.
Why cities struggle with it
Impervious surfaces increase both the peak flow and the total volume of runoff, and the traditional response of bigger pipes only moves the problem downstream. Modern practice combines pipes with detention, infiltration and reuse so the developed site behaves more like the natural one.
How engineers design for it
We size the drainage for the design storm the council specifies, provide detention to cap the peak flow, treat runoff where water quality controls apply, and make sure there is a safe overland path for storms bigger than the pipes. The result protects the building, the street and the receiving waterway.
Need an assessment or a design? Request a quote or call 02 9756 1211.