INNOVATIVE REHABILITATION OF A DEEP GULLEY IN DISPERSIVE SOIL Vergelegen
Within the space of 10 years some 150 000 m3 of soil washed out from a palmiet peat wetland near Caledon. The loss of soil caused great offsite damage by creating obstructions in the river downstream, which in turn caused fresh erosion. The erosion was finally stopped in 2016 and the rehabilitation has been ongoing since then.
The Brandwacht River near Mossel Bay has been transformed and environmentally degraded by the recent flourishing of invasive alien vegetation(post 2006). During the 2012/2013 flooding, the vegetation forced the river to divert into it’s banks, causing the loss of agricultural soil and threatening several public roads. The soil washed downstream caused further blockages and erosion.
Very recently, the Duiwenhoks River has begun to meander with much more vigour. During the 2013 flood the river moved sideways to the road and it undercut the road fill so badly that the road collapsed into the river, and had to be closed to traffic for some months.