What does a storm drainage system primarily handle?

A storm drainage system is specifically designed to manage surface runoff and rainwater, which is crucial for preventing flooding and managing water drainage in urban areas. When precipitation occurs, stormwater accumulates on surfaces such as roads, parking lots, and other impervious areas and needs a method of efficient removal.

The design of storm drainage systems typically includes features such as catch basins, drainage pipes, and retention ponds, all aimed at directing the flow of stormwater away from populated areas and toward natural water bodies or treatment facilities. This is in contrast to systems that specifically deal with wastewater from toilets or sewage, which have different functions and treatment requirements.

By effectively managing surface runoff and rainwater, storm drainage systems help reduce the risk of flooding, protect infrastructure, and mitigate water pollution caused by runoff that can carry debris, chemicals, and sediments before they reach nearby bodies of water.