The hydrology of Lake Victoria is, to a large extent, a function of the balance between rainfall on and evaporation from the lake surface. Historical climate variability has resulted in significant fluctuations in the water level in the lake. Climate models predict changes to the balance between precipitation and evaporation over the coming decades, with potentially serious impacts on the lakes water balance. These impacts have implications for the approximately 30 million people living around the lake, as well as further downstream in the Nile River basin. Hydropower, fisheries and transport are among the sectors that may be affected by changes to the water balance. Improved technologies for shaping climate resilient decisions and embedding state-of-the-art climate information into the decision workflow are critical for the sustainability of water resources and energy production in the Lake Victoria basin. There is a need for improved high resolution models to capture the specific rainfall patterns on and around the lake, as well as for systematic observations of rainfall and evaporation.
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A Century of Rainfall Variability and Recent Change in the African Great Lakes Region
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Lake Level Fluctuations, Ecological Attributes and Fish Productivity in African Lakes and Reservoirs
Hydrological regimes, including inter- and intra-annual water level fluctuations, are key drivers of productivity and structure in freshwater ecosystems in Africa, where inland fisheries are a vital source of income and protein. Using a synthesis of seventeen standardized food web models of thirteen African lakes and reservoirs, this study explored the relationship between inter- and intra-annual water level fluctuations and sixteen ecological attributes associated with ecosystem configuration, productivity and maturity.
Two Decades of Satellite-based Water Quality Measurements of Lake Victoria
Lake Victoria supports the worlds largest freshwater fishery which employs over 1 million people, and provides the regions most inexpensive source of dietary protein. Unfortunately, eutrophication and climate change are threatening critical ecosystem services, though the precise impact of these stressors is not clear. Remotely-sensed satellite data is well suited to fill large knowledge gaps and help stakeholders monitor and track ecosystem changes in this and other African Great Lakes.
Earth System Model Predictions of Climate and Environmental Changes in Great Lakes Watersheds to the Year 2100
Earth system models are the only scientific tools yet developed that are capable of integrating the multitude of physical, chemical and biological processes that determine past, present and future climate. Researchers here use the Community Earth System Model (CESM) to generate depictions of environmental futures under climate change specifically to serve stakeholder needs for each of the major Great Lake watersheds.
From Fishing Rights to Human Rights in the Lives and Livelihoods of Women Fishers in the Great Lakes Region
This research project analyzes gender-based violence in cross-border fish trade in the GLR using a human rights perspective. A human rights perspective provides an understanding of the socio-economic conditions facing women fishers in the GLR. Expanding on established research on fishing rights of marginalized people, this analysis highlights human rights issues that have been less documented: gender-based cross-border violence and threats to personal security in the GLR.
Illegal, Unregulated and Unreported Fishing on Africas Great Lakes
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Prognosis for Long-term Sustainable Fisheries in the African Great Lakes
The three largest lakes of the African Great Lakes system, Victoria, Tanganyika and Malawi, have distinctive fisheries and histories of fisheries management. All three provide essential and high quality food to their riparian populations and a range of other ecosystem services. Lakes Victoria and Tanganyika have highly commercialised and lake-wide, open-water fisheries. In Lake Malawi the commercial fishery is largely confined to the southern end of the lake, mainly exploiting demersal fish. Artisanal and low-level subsistence fisheries occur throughout all three lakes.
Status of Two Native Lake Victoria Tilapiine Species: Oreochromis esculentus and O. variabilis (Graham 1929) in Satellite Lakes, Tanzania
Lake Victoria and its basin are comprised of enormous areas of permanent and seasonal small water bodies that have been singled out as important faunal reservoirs for the endangered and threatened native species of Lake Victoria. Two tilapiine fish Oreochromis esculentus and O. variabilis are endemic and were the most commercial species in the lake fishery in early 1900s. Pressure on the fisheries and introduction of new fish species caused a severe decline of these species from the lake.
The Geographical and Genomic Structure of Endemic Fish Diversity in the Lake Victoria Basin
Lake Victoria has one of the highest endemic fish species-area-relationships of any freshwater bodies in the world. More than 90% of this diversity is composed of haplochromine cichlids that have undergone an evolutionary radiation in the region into more than 700 endemic species in the past 100,000 years. These species belong to more than 20 different major ecological guilds from large benthic and small pelagic herbivores at one end of the consumer food web to inshore and pelagic fish predators at the other end.