Gully head incision period n 1957 1957 1957 1972 1972 1972 2005 2005 2005
Forest Grassland Farmland Forest Grassland Farmland Forest Grassland Farmland
Rift margin Rift margin Rift margin Rift margin Rift margin Rift margin Rift margin Rift margin Rift margin Rift margin Rift margin
Before 1957 17 14 (82) 3 (18) 0 (0)
1957–1972 6 0 (0) 6 (100) 0 (0)
1972–2005 34 0 (0) 2 (6) 32 (94)
Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom Valley bottom
Before 1957 15 9 (60) 6 (40) 0 (0)
1957–1972 14 0 (0) 10 (71) 4 (29)
1972–2005 7 0 (0) 0 (0) 7 (100)