Word: kariba
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Dates: during 1960-1969
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When the great Kariba Dam on the Zambesi River was finished in 1959, every prospect about it was pleasing. Besides generating 1,500,000 kilowatts of power, the dam would create a lake 175 miles long where protein-starved black Rhodesians could catch fish and white Rhodesians could swim and sail. But Kariba Lake had hardly begun to fill with water when a vicious enemy showed its deceptively pretty face. A delicate, floating water fern named Salvinia auriculata appeared in patches that spread with astonishing speed. By last week dense mats, some of them strong enough to support...
...Africa. One theory is that a 19th century missionary imported it to ornament a pond. The fern's hairy, half-inch-long leaves grow in pairs on a slender stem. Each broken-off bit of stem can start a new colony. Great islands of weed drift around Kariba Lake, entangling boats and clogging harbors. Fishery experts had been counting on Kariba to support an important fishing industry, as other African lakes do, but under Salvinia's thick floating mats the water contains too little food or oxygen to sustain fish...
Expedition! (ABC, 7-7:30 p.m.).* Films show wild-animal rescue operations during the building of the Kariba Dam on Africa's Zambesi River...
Died. André Coyne, 69, French engineer and developer of the revolutionary thin-walled arch dam, whose designs have been used on five continents, include Rhodesia's giant new Kariba project and France's ill-fated Malpasset dam which gave way last December taking 421 lives, a disaster that French investigators attribute to a landslide rather than faulty design; following surgery; in Paris...