About Rainfall and Stormwater- Stormwater is heavy rainfall that runs off from surfaces and does not soak into the ground
- Stream flows and wetlands are fed largely by shallow groundwater, receiving surface runoff only during large storms.
- Traditionally, stormwater was managed through the construction of pipes and channels to carry away rainfall as quickly as possible to protect homes and the public.
- The traditional approach, combined with the removal of natural forest cover, ponds, and wetlands has led to increased volumes of rapid runoff.
- Rapid runoff can increase the risk of flooding, erosion, and degradation of stream habitat.
What is a Stormwater Management Plan?Stormwater management aims to control surface runoff by using various strategies to manage water quantity and improve water quality caused by surface pollutants. A stormwater management plan considers a range of approaches to help protect property and the public, but to also reduce channel erosion and improve the quality of stormwater runoff.
What are Ways to Manage Stormwater?- Wetland, ponds, or underground reservoirs that store and delay runoff
- Green infrastructure such as porous paving, raingardens, and landscaped features that capture stormwater
- Ditches, culverts, pipes, and repaired stream corridors that safely convey stormwater
- Guidelines for development and building design
- Dike construction to reduce the risk of flooding
|