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Proceedings of the American Society of Civil Engineers Volume 31, PT. 1 book

Proceedings of the American Society of Civil Engineers Volume 31, PT. 1 book

Proceedings of the American Society of Civil Engineers Volume 31, PT. 1.cAmerican Society of Civil Engineers
Proceedings of the American Society of Civil Engineers Volume 31, PT. 1
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Author: American Society of Civil Engineers
Number of Pages: 240 pages
Published Date: 01 Mar 2012
Publisher: Rarebooksclub.com
Publication Country: Miami Fl, United States
Language: Englishhttps://d39ttiideeq0ys.cloudfront.net/assets/images/book/large/9781/1300/9781130050790.jpg
Type: Pdf
ISBN: 9781130771282
Download Link: Proceedings of the American Society of Civil Engineers Volume 31, PT. 1
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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. 1905 Excerpt: ...obstructions, such as snags and wrack-heaps. The restriction of width wns to be accomplished: First, by Rectification, with Permeable Dikes, through the agency of which--in their function as deposit builders--flow was to be concentrated, old chutes or channels being closed, new banks built up to desired height and alignment, and the desired improved channelway developed. Second, by Fixation, with Bank Revetments, of Banks, whether natural or formed by rectification works, which conformed in position and alignment to the proposed banks of the improved river. The history of the methods and devices used in the development of Missouri River improvement works embraces the period of twenty-seven years following 1876. It is full of interest to the engineer, contains much of original and scientific research, and has contributed in no small degree to the sum of present knowledge concerning the flow and proper treatment of detrital rivers. Its narration here cannot be attempted, but a brief outline is given, with a view of indicating the range covered by experimentation. Permeable dikes.--The earliest permeable dikes on the Missouri River were composed of one or more rows of "Brownlow Weeds" in variously modified forms. In its simplest form the weed was composed of single pieces, or bundles, of brush trailing from a rope or table, one end of the rope being anchored at the bottom and the other end supported at the water surface. The butt ends of the brush were attached to the rope at short intervals from bottom to surface, the other ends being free to trail down stream as impelled by the current. The length of the rope was from one and one-half to four times the depth, according to the exposure and the existing stage of the river. In a more elaborate constru...

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