What is the main purpose of a catch basin in the stormwater system?

• A. To treat wastewater before discharge
• B. To trap debris and sediment from the surface runoff
• C. To enhance flood control systems
• D. To improve soil quality

Answer: (B)

The main purpose of a catch basin in a stormwater system is to trap debris and sediment from surface runoff. This process is crucial for managing stormwater effectively, as it helps prevent pollutants, such as leaves, trash, and sediment, from entering drainage systems and water bodies. By capturing these materials, catch basins contribute to improving water quality and maintaining the functionality of stormwater management systems.

Moreover, without catch basins, unwanted materials could clog pipes and disrupt drainage, leading to flooding and erosion in urban areas. While catch basins do play a role in flood control by ensuring smooth drainage, their primary function is focused on debris and sediment retention to protect the overall water quality and infrastructure.