In urban and developed areas, impervious surfaces such as pavement and roofs prevent precipitation from naturally soaking into the ground. Instead, water runs rapidly into storm drains, sewer systems, and drainage ditches and can cause flooding, erosion, muddiness, storm, and sewer overflow and can cause infrastructure damage. Detaining stormwater and removing pollutants is the primary purpose of stormwater management. Pervious Surfaces that are porous and allow rainfall and snowmelt to soak into the soil, Gray infrastructure, such as culverts, gutters, storm sewers, conventional piped drainage, and Blue/Green infrastructure that protect, restore, or mimic the natural water cycle, all play a part in stormwater management.