1. Department of Geomatics Engineering, University of Mines and Technology, PO Box 237 , Tarkwa, Ghana
2. Centre for Water Resources Research, University of KwaZulu-Natal, PBAG x01 , Scottsville , Pietermaritzburg, 3209, South Africa
3. South African Environmental Observation Network, Grasslands-Wetlands-Forests Node, PO Box 13053 , Cascades , Pietermaritzburg, 3202, South Africa