Joseph B. Treaster: Water and The World

A Continuing Discussion on Water and People on A Warming Planet

Apr 15 2010

A Dying African Lake, Polluted, Overfished; Bad And Getting Worse

Published by Joseph B. Treaster under Uncategorized

DUNGA, Kenya—It was shortly after daybreak and a long, wooden fishing skiff crunched up on the stony beach here along Lake Victoria. Women who sell fish in the market in nearby Kisumu swarmed the boat. They grabbed slippery Nile perch and tilapia and tossed them into their plastic baskets. Then they began haggling.

The catch that day was meager, and one woman came away with nothing. “The fishermen don’t get enough fish,” said Salin Atieno, 37. She has been buying fish at the Dunga landing for seven years. “There are not that many fish now.”

Lake Victoria, one of the largest fresh water lakes in the world, is suffering. It is polluted with raw sewage and it is muddy from the erosion of soil from nearby hills that have lost trees and shrubs to people in search of firewood. Like Lake Chad in West Africa and a few other lakes around the world, it has also been shrinking. Parts of Lake Victoria are clogged with hyacinths and algae. All of this has been thinning out the fish.

“The lake is dying,” said Dr. Raphael Kapiyo, the head of environmental studies at Maseno University in Kisumu, an East African trading post of a city with about 400,000 people.

As Kisumu and other towns and cities around the lake have grown and economies have struggled, more people have begun trying their hand at fishing. They forget about fishing seasons, if they ever knew about them, and they fish with nets that trap the smallest minnows. This all adds up to overfishing.

The governments of Kenya and the two other countries bordering Lake Victoria, Uganda and Tanzania, have established regulations on fishing and pollution. They have organized fishermen groups and restricted fishing on one of the most popular local species to give the fish breathing room for recovery. But conditions in Lake Victoria keep getting worse.

Fish processing factories dump their waste into the lake. New factories have sprung up, some of them producing soap and, as a by-product, pollution.

Kisumu has a sewage treatment plant, Dr. Kapiyo said, “but it is far from adequate and a lot of raw sewage flows directly into the lake.” Sewage spills into the lake from Uganda and Tanzania, as well. Rivers flowing into the lake pick up the runoff from farms: cattle waste and fertilizers and pesticides. The pollution might be worse were it not that the millions of poor, small farmers in East Africa use fewer chemicals than farmers in many places.

Dr. Kapiyo said the lake has receded as much as 150 feet in some places. Because of higher temperatures in Kenya, possibly because of global warming, the rate of evaporation has risen. Moreover, water is being diverted from the lake for use in running hydro-electric power plants.

“The amount of water flowing into the lake is becoming less and less,” Dr. Kapiyo said. It was late afternoon and we were talking in a garden shaded by bougainvillea and ficus trees.

“The amount of water going out of the lake,” Dr. Kapiyo said, “has become more and more.” In the shade of the trees, the baking heat had eased and there was even a little breeze.

On the Dunga beach the rising sun glinted off the water. I talked with Samson Masero. He is 29 years old and has been fishing for five years. Even in his short time on the water he has noticed a decline in fish. But as far as he can tell, he told me, there has been “no big change in the water.”

“This is like our office,” he said. “There has not been any big change.”

Jason Agwenge, 40, has 20 years more experience on the lake than Mr. Masero. He remembers a different Lake Victoria. “The water was so clean,” he said, “we used to drink it.”

Mrs. Atieno, the market woman who came away with an empty basket, was wearing a bright blue basketball jacket the morning I met her. Her hair was clipped short. Her long, leaf-patterned skirt fell to her sandals. To her, the biggest problem on the lake is overfishing. “There are not any kinds of jobs here,” she said, “and they just go to the lake. There is not any other kind of work they can do.” #

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