Flood prevention

See also: blog posts on flood prevention
The saying that ‘prevention is better than cure’ is attributed to De Legibus (c. 1240).  It applies to floods and to disease. Yet some are avoidable and others unavoidable. ‘Smoking kills’. Building drains to protect one place from flooding will accentuate flooding somewhere else.
Instead of running water into drains we should design landscapes to help it seep into topsoils, subsoils and aquifers as near to where it falls as possible. Detention, infiltration and evapo-transpiration are better than drainage. Drainage engineers should work with landscape architects to design sustainable urban drainage systems (SUDS) and to plan water-sensitive design on a city-wide basis.

This is not sustainable urban drainage

The hard surfacing and road kerb stop the stormwater from infiltrating into the ground and re-charging the aquifer. This is not sustainable urban surface water drainage (SUDS)