What is the main function of an outlet protection device?

The main function of an outlet protection device is to prevent scour at outlets. Scour refers to the erosion or removal of sediment around the outlet structure where water is discharged. When water is released from a pipe or other outlet, it can create turbulence and increased flow velocity, which may lead to the erosion of soil and sediment, potentially compromising nearby structures and water quality. By implementing outlet protection devices, such as riprap, gabions, or concrete aprons, the energy of the flowing water is dissipated, reducing the velocity and minimizing the potential for erosion. This function is crucial in managing stormwater effectively and ensuring the stability of the outlet over time.