What type of drainage system is primarily used for rainwater management?

The type of drainage system primarily used for rainwater management is the storm drainage system. This system is designed specifically to handle and direct rainwater, preventing flooding and water damage to buildings and infrastructure. Storm drains collect rainwater runoff from surfaces such as roofs, streets, and parking lots, directing it away from buildings and towards appropriate discharge points, such as storm sewers or retention basins.

Using a storm drainage system is essential for managing the volume and velocity of water during rain events, helping to mitigate erosion, water pooling, and other related issues. It operates separately from sanitary drainage systems, which are intended for the disposal of wastewater and sewage, highlighting the specialized function of storm drainage in urban planning and infrastructure.

In contrast, other systems such as the combined drainage system, which amalgamates both sanitary and stormwater, may not provide the same level of efficiency in managing rainwater. Gravity drainage systems may refer to general principles of drainage but do not specifically address the unique needs and regulations surrounding stormwater management in a dedicated manner.