how can you design a system to stop erosion?

Answer 1

Adopt stormwater runoff pollution prevention techniques. There are hundreds of methods including, but not limited to, Installation of silt fencing, mulching, restoration of plants, etc...

Check out the site below and see what it can tell you.

International Erosion Control Association: http://www.ieca.org/

Answer 2

The best way to stop erosion is to plant trees and shrubs. The root material holds the surface of the ground together, essentially, and protects it from losing soil in runoff during rain, wind erosion, and wave action.