Changes

3,000 for permanent dams (made from stones, bricks, cement), depending on the length and height. Variation depends on materials used and size of gully.

In Ethiopia, unclarity over land tenure led to progressive abandonment of cropping in gullies. See: Falkenmark, M.; Fox, P.; Persson, G.; Rockström, J. (2001) [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CD0QFjAA&url=http%3A%2F%2Fwww.siwi.org%2Fdocuments%2FResources%2FReports%2FReport11_Water_Harvesting_for_Upgrading_Rainfed_Agriculture_2001.pdf&ei=qvx4T8v0OJTKiQK85M2nDg&usg=AFQjCNFxkkLdpNpbAIlKJgknD5rvDe93Bg&sig2=f3dVjKV45u_5uLracic_VQ Water harvesting for upgrading of rainfed agriculture. Problem analysis and research needs]. Stockholm International Water Institute.