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C.E.F.) Drainage systems and waterways LAKE CHAD Lake Chad (French: Lac
Tchad) is a freshwater lake located in the Sahelian zone of west-central Africa at
the conjunction of four countries: Chad, Cameroon, Nigeria, and Niger.
Annual rainfall averages 22 inches (560 millimetres) at the southern margin of
Lake Chad and about 10 inches at the northern margin. Variability during the
year is high and increases from south to north; variability from year to year is also
Natron being unloaded along the eastern shore of Lake Chad near Baga Sola,
Chad. © Jacques ... Natron (hydrated sodium carbonate), found in depressions
along the northeastern shore of the lake, has long been economically important.
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review