Georgia Concrete and Products Association

New ideas in flood mitigation include porous pavements, porous sidewalks, microretention and detention [with vegetated swales], and microrelief.

Flat land was probably created by a flood; so floods underlie the terrain's geomorphology.

The flatter the land, the more prone to flooding.

Kinematic slopes [greater than 1%] will move water out [drain] as fast as possible.

Grading produces onsite drainage, but it increases the risk of flooding offsite.