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Wadi
A riverbed that remains dry except during the rainy seasons.
Glossary
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Warsaw Pact
A military alliance, now dissolved, consisting of the Soviet Union and the European countries of Poland, East Germany, Czechoslovakia, Hungary, Romania, and Bulgaria.
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Water contact diseases
Water contact diseases acquired through swimming or wading in freshwater lakes, streams, and rivers.
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Waterhead
In attempting to control water for the generation of electricity or a gravity flow irrigation project, it is essential to pond up water in relative quantity so that there is an adequate force – Waterhead – to achieve the desired goal.