1. Biological and Environmental Engineering; Cornell University; Ithaca NY USA
2. Amhara Region Agricultural Research Institute; Bahir Dar Ethiopia
3. U.S. Department of Agriculture, Agricultural Research Service; National Sedimentation Laboratory; Oxford MS 38655 USA
4. Faculty of Civil and Water Resources Engineering; Bahir Dar University; Bahir Dar Ethiopia
5. International Water Management Institute (IWMI); P. O. Box 5689 Addis Ababa Ethiopia
6. Department of Earth and Environmental Sciences; KU Leuven, Celestijnenlaan 200E Leuven 3001 Belgium