Instructions Relating to the Gathering of Certain Preliminary Information Respec
Instructions Relating to the Gathering of Certain Preliminary Information Respec
Arthur V White
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*For representative examples of methods, and reports of investigations respecting water-power resources, reference may profitably be made to various publications mentioned on pages 19-20 of The Water Powers of Canada, Ottawa, 1911 ; also to such works as River Discharge, by J. C. Hoyt and N. C. Grover, New York, 1908 (here quoted); also, A Treatise on Hydraulics, by H. J. Hughes and A. T. Safford, New York, 1911; also, Irrigation Engineering, by H. M. Wilson, New York, 1909. RESPECTING WATER-PO...WERS 21 Sounding rods are limited in use to depths of less than 15 feet. They are best adapted for use at wading and boat stations, where the depths and velocities are relatively small. Rods may occasionally be used at bridge stations where the bridge is not high above the water. The weight and line are used in making soundings in water of greater depth than 15 feet, and from bridges or cables which are high above the water. Soundings from a bridge, or cable, with weight and line are most readily taken as follows : Lower the weight and line until the weight rests on the bed of the river directly underneath the the measuring point.
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