What is the function of riprap?

Riprap serves primarily to control erosion along waterways. It consists of large, loose stones or other materials placed along the banks of rivers, lakes, and other bodies of water. The primary function of riprap is to absorb and deflect the energy of flowing water, thereby preventing soil erosion caused by water flow or wave action. This stability can help maintain the integrity of shorelines and prevent sediment from entering the water, which can lead to increased turbidity and harmful impacts on aquatic life.

While riprap may have some incidental benefits, such as providing surface area for algae or small organisms and, to a lesser extent, offering shelter for certain fish species, its main design purpose is to combat erosion. This is particularly important in managing habitats and ensuring the natural balance of ecosystems within waterways.