What purpose do storm drains serve in relation to concrete?

Storm drains primarily serve to manage water runoff from surfaces such as roads and parking lots, especially during heavy rain. This system helps prevent water from pooling, which can lead to erosion, flooding, and damage to concrete surfaces. By directing excess rainfall into a controlled drainage system, storm drains protect not only the integrity of the concrete but also the overall infrastructure by directing water away from areas where it might cause damage or create hazardous conditions.

In contrast, while enhancing aesthetic appeal might be a consideration in some designs, it is not the primary function of storm drains. Supporting building foundations relates to different structural requirements, and reducing material costs does not align with the purpose of storm drains but instead speaks to economic factors that may influence construction budgets. Therefore, managing water runoff is the essential role storm drains play in relation to concrete and related structures.