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Due to growing human activities in its watershed, Lake Victoria, the second biggest source of fresh water in the world, becomes progressively enriched with nutrients and is now considered as eutrophic.

One of the main consequences of eutrophication is the proliferation of macroalgae and/or photosynthetic microorganisms. These blooms disturb the functioning of the ecosystem as well as its uses, such as water supply and recreative activities, in particular when the bloom-forming species are toxic.

Funded by the French Facility for Global Environment (FFEM) and co-funded by the French Development Agency (AFD), French and African research teams worked for the past 4 years on the assessment of the water quality and the vulnerability of three lakes used for drinking water production in three African countries (WaSAf programme). In Uganda, these studies have been performed on Murchison Bay and Napoleon Gulf.

 

 

 

Organisateurs

Session 1 | Presentation of the main data collected during the WaSAf programme – 4 March 2021 / 9:00 – 12:30 (EAT) / 7:00 – 10:30 (CET)

 

Socioecological analyses of the causes and consequences of cyanobacterial blooms in Lake Victoria:

• Presentation of the review paper published in Harmful Algae

• Invited lecture on the recent evolution of the water quality in the main lake

Controlling factors of cyanobacterial blooms in the bays and gulfs of Lake Victoria:

• Presentation of the WaSAf data collected during the monitoring programme and the experimentations performed in Murchison Bay and Napoleon Gulf

• Invited lecture on the potential impact of the blooms of cyanobacteria on fishes

Toxic risks associated with cyanobacterial blooms:

• Presentation of the WaSAf data on the cyanotoxins concentrations in Murchison Bay and Napoleon Gulf and in two water plants (Ggaba and Jinja)

• Invited lecture on the exposition to cyanotoxins of populations living around the Nyanza gulf

 

 

Session 2 | Round tables on: What lessons can be drawn from these results in terms of risk management and ecosystem protection / restoration? – 4 March 2021 / 14:00 – 17:15 (EAT) / 12:00 – 15:15 (CET)

 

Round Table 1: Long term monitoring of the lake and its bays and gulfs

Opening presentation 1: Monitoring of the Lake Victoria: Current situation and prospects

Opening presentation 2: New approaches for the monitoring of cyanobacterial blooms

Round Table 2: How to limit the exposure of human populations to cyanobacterial toxins?

Opening presentation 1: What are the main exposure routes and the main risks associated with cyanobacterial blooms?

Opening presentation 2: How to limit human contamination by cyanotoxins

– Information for people

– Improvement of water treatment processes

– Household water treatment systems

 

Session 3 | Round table on: What priorities to limit eutrophication and therefore blooms of cyanobacteria?5 March 2021 / 9:00 – 12:00 (EAT) / 7:00 – 10:00 (CET)

 

Round table 3 : What priorities to limit eutrophication and therefore blooms of cyanobacteria?

• Opening presentation 1: General overview on the main causes explaining the eutrophication of the Lake Victoria

• Opening presentation 2: Assessment of the implementation of wastewater treatment in large urban areas

• Opening presentation 3: Assessment of the management actions performed on the watershed of the Lake Victoria

• Opening presentation 4: Protection/ restoration of wetlands

Date

jeudi 04 mars 2021

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