In theory it is possible to return predevelopment hydrology if SCM network, perfectly mitigate all effects of urbanisation.

In practice the goal of stormwater management which is broadly around restoring the predevelopment hydrology is rarely achieved.

Most studies detected changes in small changes in hydrology such as reduction in annual runoff.

All the empirical studies attempted the open this matter to some extent, however there are still a lot of complexities still remaining.

Catchment capacitance, climatic changes and other urbanisation changes are other variables that hugely influence the runoff generated from impervious surfaces.

Last updated: 3rd Oct 2019