Naivasha nīväˈshä [key], lake, 12 mi (19.3 km) long and 9 mi (14.5 km) wide, W central Kenya, E Africa, in the Great Rift Valley. Large flower farms that supply European flower markets have been developed near the lake, and their irrigation systems have been blamed for the significant drop in the lake's water level since 1975. Located near Nairobi, the lake and the town of Naivasha are a popular resort.

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