Engineering Wonders of the World
Volume III
Forfatter: Archibald Williams
År: 1945
Serie: Engineering Wonders of the World
Forlag: Thomas Nelson and Sons
Sted: London, Edinburgh, Dublin and New York
Sider: 407
UDK: 600 eng- gl
With 424 Illustrations, Maps, and Diagrams
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THE GREAT IRRIGATION WORKS OF INDIA.
239
HEAD BUNDS, OR IEMPORARY DAM, OF THE GANGES CANAL, LOOKING UP-SffREAM.
The construction of the bunds is described in the letterpress.
minutes by hand against 2J to 3 feet of water.
Only when the last two or three have to be
raised, and the pressure of the water has in-
creased greatly, are mechanical means neces-
sary.
The Chenab Canal system cost £2,000,000;
the gross revenue derived from it is about
£500,000 annually ; the value of crops raised
on the land watered by it was in 1907 over
£2,500,000. These figures show conclusively
whether the expenditure has justified itself.
The natives of India still'believe, or profess
GOPULPUR WORKS, SHOWING BRANCHING AND JUNCTION OF THE GANGES AND LOWER GANGES CANAL.