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Binder1 - 184 WATER-RESOURCES ENGIN EERING Dewsnut Richard...

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184 WATER-RESOURCES ENGINEERING Dewsnut, Richard L., and Dallin W. Jensen (Eds.): “A Summary Digest of State Water Laws,” National Water Commission, U.S. Government Printing Office, Washington, D.C., 1973. A Getches, David H.: “Water Law in a Nutshell,” West Publishing Co. St Paul Minn 1984 Goldfarb, William: “Water Law,” 2d ed., Lewis Publishers, Chelsea, Mich., 1988. Hough, James E.: The Engineer as Expert Witness, pp. 56—58, “Civil Engineering,” American Society of Civil Engineers, New York, December 1981. Meyers, Charles J., and A. Dan Tarlock: “Water Resource Management a Casebook in Law and Public Policy,” 2d ed., The Foundation Press, Mineola, New York, 1980. Rice, Leonard, and Michael D. White: “Engineering Aspects of Water Law,” Wiley, New York, 1987. Trelease,Frankj.: “Cases and Materials on Water Law,” 4th ed., West Publishing Co., St. Paul, 1.ESEIIR..S “Water Policies for the Future,” Final Report to the President and Congress of the U.S National Water Commission, U.S. Government Printing Office, Washington, D.C., June 1973. A water-supply, irrigation, or hydroelectric project drawing water directly from a stream may be unable to satisfy the demands of its consumers during low flows. This stream, which may carry little or no water during portions of the year, often becomes a raging torrent after heavy rains and a hazard to all activities along its banks. A storage, or conservation, reservoir can retain such excess water from periods of high, flow for use during periods of drought. In addition to conserving water for later use,.the storage offloodwater’may also reduce flood damage below the reservoir. Because of the varying rate of demand for water during the day, many cities find it necessary to provide distribution reservoirs within their water- supply system; Such reservoirs permit water-treatment or pumping plants to operate, at a reasonably uniform rate and piovide water from storage when the demand exceeds this rate. On farms or rnchés, stock tanks or farm oids may conserve the intermittent flow from small Creek for useful purposes. Whatever the size of a reservoir or the ultimate use of the water, the main function of a reservoir is to stabiliz the flow of. water, either by regulating a varying supply ma natural stream or by satisfying a varying demand by the ultimate consumers. The general aspects of reservoir design are discussed in this chapter, while the special aspects pertinent t6 .specfic.ues are covered more fully in Chaps. 14 to,21.. . . 7.1 Physical Characteristics of Reservoirs Since the primary function of reservoirs is to provide stàrage, their most important physical characteristic is storage capacity. The cnwiti if -‘--- -
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186 WATER-RESOURCES ENGINEERING RESERVOIRS 187 reservoirs on natural sites must usually be determined from topographic surveys.
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