A diversion keeps excess runoff away from areas with concentrated pollutants such as barnyards or feedlots and fields with easily eroded soils. A diversion is basically a dirt berm, placed on the correct place in the landscape, which directs water to a different area. A diversion at the base of a slope can help keep bottom lands drier and more productive. Similar to terraces, the permanent vegetation on a diversion provides habitat for birds and small animals.
