What is the primary function of diversion ditches?

The primary function of diversion ditches is to redirect runoff away from disturbed areas. This is crucial in erosion and sedimentation control since disturbed sites, such as construction areas, are more susceptible to erosion. By channeling water away from these areas, diversion ditches help minimize soil displacement and the amount of sediment that could be washed into nearby water bodies. This proactive measure protects the integrity of the site and the surrounding environment, preserving water quality and reducing the need for more intensive remediation efforts later on.

In contrast, options such as increasing water flow or accumulating water for irrigation do not align with the primary goal of preventing erosion and sediment loss. Creating drainage basins, while related to water management, focuses more on collecting excess water rather than specifically redirecting runoff from vulnerable areas.