Linus Munishi, Kelvin Mtei, School of Life Sciences and Bio-Engineering, School of Materials, Energy Water and Environmental Sciences, Nelson Mandela - African Institution of Science and Technology, Tanzania and Amsalu Nebiyu, Bayu Dume Gari, College of Agriculture & Veterinary Medicine, Jimma University, Ethiopia.
Soil erosion and subsequently siltation of dams and lakes are becoming serious threats to catchment ecosystem services like water, food and energy security in East-Africa. Sediments originate on catchment hill slopes. The primary driver for mobilization and translocation to downstream is erosion on agricultural lands and river channels where loss of this finite resource threatens food security, water, energy and biodiversity. Thus, knowledge of sediment source and transfer dynamics in East-African river catchments is critical to inform policy decisions to maintain and enhance future food, water and energy security. Literature on soil erosion and land management challenges in the two (Gilgelgibe, Ethiopia and Lake Manyara, Tanzania) catchments is reviewed in the context of IMIXSED project implementation plan whose central goal is to demonstrate the strengths of isotopic sediment tracer technology with ecological source distribution models developed to deliver a powerful tool to combat threats to global food, water and energy security in the affected areas.