The Lake Natron threat ranks are expressed in terms of the Adjusted Human Water Security (Adj-HWS) threats, Reverse Biodiversity (RvBD) threats, and the Human Development Index (HDI) score, as well as combinations of these indices. The scenario analysis program also provides a means to define the appropriate context and preconditions for interpreting the ranking results. These descriptive data for Lake Natron and the other transboundary lakes included lake and basin areas, population numbers and densities, areal extent of basin stressors on the lake, data grid size, and other components considered important from the perspective of the user of the data results. The lake threat ranks were calculated with a spreadsheet-based interactive scenario analysis program, incorporating data and information about the nature and magnitude of their basin-derived stresses, and their possible impacts on the sustainability of their ecosystem services. Using basin characteristics to rank transboundary lake threats precludes consideration of the unique features that can buffer their in-lake responses to basin-derived disturbances, including an integrating nature for all inputs, long water retention times, and complex, non-linear response dynamics. (b)Lake Natron/Magadi basin land use Lake Natron/Magadi Threat RankingĪ serious lack of global-scale uniform data on the TWAP transboundary in-lake conditions required their potential threat risks be estimated on the basis of the characteristics of their drainage basins, rather than in-lake conditions. (a)Lake Natron/Magadi basin and associated transboundary water systems International Treaties/Agreements Identifying Lake It also would have synergistic effects in terms of both GEF-catalyzed management interventions and the development and implementation of national strategic plans, suggesting the exploration of a regional transboundary/non-transboundary management framework. Lake Natron and nearby Lake Magadi would benefit considerably if the two riparian countries (Kenya and Tanzania) would include them within the context of their national strategic plan for collective integrated management of the region’s Rift Valley lakes. Potential development threats to the lake include a proposed hydropower plant for the Ewaso Ngiro River in Kenya and possible soda ash exploitation in the lake. It is the only regular breeding site for the East African population of Lesser Flamingos, supporting approximately 2.5 million flamingos. It is located in the Lake Natron Basin, a Ramsor wetland site of international significance. Lake Natron is a terminal soda lake located in the East African Great Rift Valley surrounded by escarpments and volcanic mountains. Lake Natron/Magadi Geographic Information
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