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Principles of Irrigation Engineering; Arid Lands, Water Supply, Storage Works, Dams, Canals, Water Rights and Products - Softcover
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 Excerpt: ...Cement tiling may also be considered permanent in soils which do not contain alkali. In some of the soils of the west, however, cement has been found to be disintegrated by the action of alkali upon it. Cement tiling for this reason cannot be recommended for use in lands containing alkali to any appreciable degree. Vitrified sewer pipe with bell joints does not possess any advantages over hard-burned clay tiling with straight joints. It costs more than the ordinary tiling, and is more difficult to put in place on account of cutting out for the flanges in the bottom of the trench. The flange joints are also more likely to become silted than ordinary straight joints. One example has been reported of a drainage line made from ordinary vitrified pipe where the joints became sealed by silting so that no water could enter it. Wood on account of its tendency to decay cannot be considered as suitable material for closed drains where permanency is required. The decay of wood in a drainage line is hastened by the fact that portions of the drain may be dry during a part of each year. On account of the nature of the work being such that close inspection cannot be made of it from time to time and the difficulty in finding and repairing breaks in a closed drain, permanent construction should be used wherever possible. Relief and Intercepting Drains.--Drains are sometimes classed as relief and intercepting depending upon the manner in which water reaches them. A relief drain is one which taps a wet area directly and permits the ground water to flow out from different directions into the drain. An intercepting drain is one intended to cut off an underground flow and carry away the water before it reaches an area where the formation is such that it will rise to the surface....
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- PublisherRarebooksclub.com
- Publication date2012
- ISBN 10 1232272914
- ISBN 13 9781232272915
- BindingPaperback
- Number of pages104
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