Sedimentation is the process by which the products of erosion (i.e. rocks, sand, and/or clay) settle out and deposit onto the bottom of a water body.
Some materials in the San Juan Mountains erode more easily than others. Easily eroded materials include shale, sandstone, and limestone.
Sedimentation can occur on land or in water. It can cause damage of land and cause safety issues on roads.
Sedimentation can cause issues with capacity in rivers, lakes, ditches, canals, etc. Filling them up and displacing water or overflowing onto roads.
Sedimentation is often linked to suspended solids and high turbidity that can affect aquatic life.