Affiliation: | a Wageningen University, Land Degradation and Development, P.O. Box 47, 6700 AA Wageningen, The Netherlands;b Hawassa University, Wondo Genet College of Forestry and Natural Resources, P.O. Box, 128, Shashemene, Ethiopia;c Addis Ababa University, Department of Civil Engineering, P.O. Box 385, Addis Ababa, Ethiopia;d Utrecht University, Department of Physical Geography, P.O. Box 80115, 3508 TC Utrecht, The Netherlands |