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supply-side economics
supply-side economics economic theory that concentrates on influencing the supply of labor and goods as a path to economic health, rather than approaching the issue through such macroeconomic concerns as gross national product. In the United States during the 1980s, supply-side economics was associ...
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standpipe
standpipe tank or pipe for holding water in an elevated position to create pressure in a water supply system. For a tall building, where the pressure from the mains at street level is insufficient to raise the water to the upper floors, water is pumped up to the standpipe and fed by gravity into th...
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plumbing
plumbing piping systems inside buildings for water supply and sewage. The Romans had a highly developed plumbing system; water was brought to Rome by aqueducts and distributed to homes in lead pipes—hence the name plumbing from the Latin word plumbum for lead. During the Middle Ages, howeve...
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water supply
water supply process or activity by which water is provided for some use, e.g., to a home, factory, or business. The term may also refer to the supply of water provided in this way.
In the United States, the average residential daily water supply demand is 100 gal (380 liters) per person, alth...
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aorta
aorta , primary artery of the circulatory system in mammals, delivering oxygenated blood to all other arteries except those of the lungs. The human aorta, c.1 in. (2.54 cm) in diameter, originates at the left ventricle of the heart . After supplying the coronary arteries that nourish the heart it...
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impedance
impedance in electricity, measure in ohms of the degree to which an electric circuit resists the flow of electric current when a voltage is impressed across its terminals. Impedance is expressed as the ratio of the voltage impressed across a pair of terminals to the current flow between those termi...
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catchment area
catchment area or drainage basin, area drained by a stream or other body of water. The limits of a given catchment area are the heights of land—often called drainage divides, or watersheds—separating it from neighboring drainage systems. The amount of water reaching the river, reser...
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Chenab
Chenab , one of the "five rivers" of the Punjab, 675 mi (1,086 km) long, rising in the Indian state of Himachal Pradesh and flowing NW through the Kashmir Himalayas, then SW through Pakistani Punjab to join the Sutlej River. The Ravi and Jhelum rivers are the chief tributaries. The Chenab suppli...
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Naivasha
Naivasha , 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 lev...
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Berlin airlift
Berlin airlift 1948-49, supply of vital necessities to West Berlin by air transport primarily under U.S. auspices. It was initiated in response to a land and water blockade of the city that had been instituted by the Soviet Union in the hope that the Allies would be forced to abandon West Berlin. T...
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