What are catch basins used for in drainage systems?

Catch basins are primarily designed to convey surface water into sewer systems, particularly in areas where grass or other permeable surfaces may not effectively manage stormwater runoff. Their structure allows for the collection of rainwater and surface runoff, directing it toward drainage pipes and ultimately into the municipal sewer system. Catch basins also help to filter debris and sediment from the water, which is essential in maintaining the quality of the water being directed into larger drainage or sewage systems.

The role of catch basins in urban drainage helps mitigate issues related to excessive surface water that can lead to flooding or erosion. They are strategically placed in areas where surface runoff is anticipated to promote efficient drainage. By functioning as the initial point of collection for this water, catch basins play an important role in stormwater management and in protecting paved areas from potential flooding.

Other options, such as preventing flooding in paved areas, while related, do not capture the primary function of catch basins, as their main purpose is to transport water rather than solely serve as a flood prevention measure. Similarly, options related to groundwater collection and storing excess water for future use do not accurately reflect the intended use and functionality of catch basins in a drainage system.