What is the primary purpose of a diversion in site drainage?

The primary purpose of a diversion in site drainage is to intercept surface runoff. Diversions are engineered features designed to redirect water flow away from specific areas to prevent flooding, erosion, or other water-related issues on a site. By intercepting surface runoff, diversions help manage potential water accumulation and guide excess water to appropriate drainage systems or areas where it can be safely discharged or utilized, such as in bioswales or retention basins.

In contrast, flooding a specific area would contradict the function of a diversion, which aims to control and alleviate excess water flow. Enhancing water flow is not a goal of diversions; rather, they are used to manage water flow effectively. Creating a permanent pond is also not the focus of a diversion, as that would involve a different type of water management system designed for long-term water retention rather than the temporary redirection of runoff.