Temporary ponding is a short lived flood situation, which, in some circumstances, can be tolerated allowing an intentionally undersized trench drain system. It allows a more economical system to be used that will work effectively under most weather conditions, but will be slightly under designed for heavy storms.

Ponding analysis should only be considered where buildings and property are not in close proximity to the drainage system to minimise risk of damage. It is an ideal option for the outer areas of large parking lots, distribution yards, etc., (Risk Analysis).

The ponding analysis map shows the size and duration of the flood.

In order to produce a ponding analysis, the following information is required:

	Full information required to run the 'Hydro' plot
	Plan of site showing elevations
	Existence of any buildings
	Perpendicular approach slopes to trench (%)
Results provided are:
	Plot showing extent of ponding: width and depth
To request this service, click here.