By Sharon Atieno
Though Lake Turkana which sits in the arid part of northern Kenya appeared to be drying up, a new report shows that climate change could lead to an increase in its water levels.
According to the United Nations Environment Program (UNEP) report, over the next 20 years, climate change could likely lead to heavier rains over Lake Turkana’s river inflows, which would raise water levels in the lake itself and increase the likelihood of severe flooding.
The study urged officials in Kenya and Ethiopia, which both border Lake Turkana, to prepare for a future in which once-rare floods, such as those that hit the region in 2019 and 2020, are regular occurrences.
In 2020 alone, heavy rainfall resulted in Lake Turkana rising by 300m to 800m.
“Many people think that climate change is a problem for the future,” says Frank Turyatunga, Deputy Head of UNEP’s Africa Office in a statement. “But as Lake Turkana shows, it’s happening now and it’s already forcing people to adapt to new conditions.”
Lake Turkana, the world’s largest desert lake, is part of the Omo-Turkana basin, which stretches into four countries: Ethiopia, Kenya, South Sudan and Uganda. The basin is home to many rare plants and animals.
Since 1988, Ethiopia has built a series of hydroelectric dams on its main tributary, the Omo River, leading to predictions of Lake Turkana’s demise.
Its main river inflows had been muffled by dams and many feared water levels were poised to drop by two-thirds, causing the lake to cleave into two smaller bodies of water. It was, one report said , an African “ Aral Sea disaster in the making” – where only 10 per cent remains of the original sea.
“There is still a mindset in Kenya that lake water levels are constantly falling, which makes planning difficult,” said Tito Ochieng, Director of Water, Turkana County in a statement.
Climate projections
Using sophisticated water resources modeling and climate change scenario analysis, the new UNEP report found that up to eight human settlements around the lake could be inundated by flooding periodically. While severe, abrupt flooding has been rare, climate change projections foresee this becoming more regular and impacting more people if adaptation measures are not put in place.
The report called for improved international cooperation and adaptation measures, including reforestation, agroforestry and avoiding construction in areas at risk of flooding.
“In the last two years, rising water levels in Lake Turkana have damaged pastureland, inundated buildings and forced people to flee their homes,” says Tito Ochieng, Director of Water in Kenya’s Turkana County. “But there is still a mindset in Kenya that lake water levels are constantly falling, which makes planning difficult.”
The study also found evidence of rising water levels in the eight lakes that line Kenya’s Rift Valley. Severe flooding in those lakes in 2019 and 2020 damaged homes and infrastructure – and even reportedly led to a spike in deadly crocodile attacks.
Africa remains to be the most vulnerable region in the world to climate change fuelled by the prevailing low levels of socioeconomic growth in the continent.
UNEP’s climate change work in Africa supports countries to implement their climate action commitments – Nationally Determined Contributions (NDCs) – to meet food security, create income and opportunities for youth, and economic expansion.
The report was part of a wider project designed to accelerate cooperation in the border areas between Ethiopia, Kenya and Somalia.
The project also developed an open-source information portal on the basin, based in part on satellite imagery. It contains data on land cover, water quality and soil moisture, and examines the various climate change scenarios.
The report follows the launch of the UN Decade on Ecosystem Restoration 2021-2030 , a global push to revive natural spaces. It is also part of UNEP’s wider work to monitor and restore freshwater ecosystems worldwide, supporting Sustainable Development Goal 6 .
