Climate Change Could Spark Floods in World’s Largest Desert Lake


Human Wrongs Watch

20 July 2021 (UNEP)* — For years it appeared as though Lake Turkana, which sits in an arid part of northern Kenya, was drying up.

El_Molo_village_Lake_Turkana

UNEP/Duncan Moore / 19 Jul 2021

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.

But a new study from the United Nations Environment Programme (UNEP) predicts a far wetter future for Lake Turkana – and possibly a more perilous one for the 15 million people who live on its shores.

The report found that 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.

“Many people think that climate change is a problem for the future,” says Frank Turyatunga, Deputy Head of UNEP’s Africa Office. “But as Lake Turkana shows, it’s happening now and it’s already forcing people to adapt to new conditions.”

https://assets.unenvironment.org/s3fs-public/styles/juicebox_medium/public/2021-07/Water_collection.jpeg?itok=7G9biyi3

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.

There is still a mindset in Kenya that lake water levels are constantly falling, which makes planning difficult.

Tito Ochieng, Director of Water, Turkana County (Kenya)

Climate projections

Using sophisticated water resources modelling 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.

https://assets.unenvironment.org/s3fs-public/styles/juicebox_medium/public/2021-07/Dasenech_2.jpeg?itok=tN7Gm7Az

Dried up riverbed at Omo, Ethiopia, which flows into Lake Turkana. Photo: Desta Wodebo/2020 

“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.

*SOURCE: UNEP. Go to ORIGINAL.

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