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. 1895 Excerpt: ...of the river is commonly a flattened curve, concave toward the sky, the degree of curvature depending on a variety of conditions, of which one of the most important is the increasing volume of the stream. This curved profile exemplifies the laic of tcater profiles, and the degree of curvature affects the rate of ...
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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. 1895 Excerpt: ...of the river is commonly a flattened curve, concave toward the sky, the degree of curvature depending on a variety of conditions, of which one of the most important is the increasing volume of the stream. This curved profile exemplifies the laic of tcater profiles, and the degree of curvature affects the rate of deposition of mechanical sediment borne in the stream, and thus the value of the stream as a source of potable waters. 1 Defined in detail in the Eleventh Annual Report of tho U. S. Geological Survey, 1S91, p. 246. 14 GEOL, PT 2 3 The general law of water profiles is affected and measurably antagonized by a subordinate law (the laic of rarigradation),1 under which the curved stream profile is broken up into alternating pools and rapids. These alternations of relatively still and relatively rapid water are initiated by a variety of causes and conditions, and exert an important influence on the work of the stream in excavating its channel and in fashioning its drainage basin; and they exercise a decided influence on the deposition of matter transported by the stream, and are thus of exceeding consequence in streams used as sources of potable waters. The rate of stream flow in general depends on slope or declivity; and in general (1) the amount of matter transported in the waters and (2) the activity of the stream in cutting its channel and fashioning its drainage basin depend on the rate of flow and so on the declivity. Other conditions also affect the rate at which sediment is conveyed; i. e., the muddiness of waters. One of these is time distribution of the rainfall. Nearly all of the work of streams in transporting sediment and corrading channels is performed during or in consequence of storms; and other things equal, it may be said that the activi...
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Add this copy of The Potable Waters of Eastern United States to cart. $53.62, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2019 by Wentworth Press.