Whether the erosion is anthropogenic (related to human activity) or natural, it has a significant impact on the quality of the environment and watercourses. The transport and deposition of sediments in watercourses generate important environmental, social and economic issues.
Here are some:
Transfer of chemical substances in the environment following their adsorption or absorption by sediments.
Decrease in watercourse depth and restriction of navigation. Dredging is then required.
Decrease of the penetration of light into the water due to the presence of suspended sediments (which leads to an increase in fish mortality).
Alteration of environmental conditions necessary to sustain the ecosystem (e.g. increase in watercourse temperature resulting from the adsorption of heat at the level of suspended particles).
Proliferation of blue-green algae and aquatic plants (due to excessive inputs of phosphorus).
Water distribution system interferences (e.g. increase in costs related to water supply systems connected to watercourses).