Wetlands reduce floods by storing extra water, controlling

pollution and sediment, and providing detoxification and erosion control.

Wetlands must be removed and replaced with tanks to be

useful in urban stormwater systems.

Wetlands accelerate runoff to downstream areas, increasing

peak flow rates.

Wetlands function effectively only when the water table is

at least 5 meters below the surface.

Wetlands are only applicable for wastewater treatment and

have no role in flood attenuation.