1. Centre for Water Resources Research, Univ. of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa; Grasslands-Forests-Wetlands Node, South African Environmental Observation Network, P.O. Box 13053, Cascades 3201, South Africa (corresponding author). ORCID: .
2. Grasslands-Forests-Wetlands Node, South African Environmental Observation Network, P.O. Box 13053, Cascades 3201, South Africa; Centre for Water Resources Research, Univ. of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg 3209, South Africa.