Sand, Soil or Gravel Bags
Purpose: Sand, soil or gravel bags are used in small channels or on hillslopes to trap sediment and interrupt water flow.
Relative effectiveness: No interviewees rated this treatment. Comments indicate that bags are useful in ephemeral channels or on slopes, where they are placed in staggered rows like contour felling in areas where there are no trees. Rows of bags break water flow and promote infiltration. They store sediment temporarily, then break down and release it.
Implementation and Environmental Factors: When bags are used in channels, installation sites must be selected by an experienced person. They are not appropriate for use in V-shaped channels. Installation of soil bags is labor-intensive, but they can be a relatively cheap treatment if volunteer labor is used. The bags are easy for volunteers to fill and install.