Increasing snowmelt from the Rwenzoris, overgrazing, and other alterations to the watershed have caused bank erosion and frequent changes to the course of the meandering lower reaches of the river. In some places, Uganda is losing up to of land per year on its side of the river to erosion and silt from the Semliki is gradually filling in the southern end of Lake Albert. In other places, it is the DRC that is losing territory as the changing river course alters the apparent location of the border.