River Discharge: Prepared for the Use of Engineers and Students |
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Common terms and phrases
abscissas accuracy acre-feet acre-foot area curves area of cross-section axis banks basin bottom bridge broad-crested weirs CABLE STATION cent channel coefficient computed Connecticut River crest current meter current-meter daily discharge datum determined discharge curve discharge in second-feet discharge measurements drainage drainage basin effect elevation end contractions engineer equals errors Esopus Creek evaporation factors float foot formula gage heights gaging station gallons Geological Survey head horsepower hydraulic radius large number length mean depth mean velocity measurements of discharge mile miner's inches necessary number of days obtained ordinates permanent plotted Point of Rocks Potomac Potomac River precipitation quantity rain gage rainfall rating table Roanoke Rondout Creek Sec.-ft sharp-crested weirs shows slope square square mile station rating curve storage stream flow Susquehanna temperature tion United States Geological velocity curves velocity of approach vertical velocity-curves water surface wheel width
Popular passages
Page 99 - Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is distributed uniformly both as regards time and area. "Run-off in inches...
Page 99 - Run-off in inches" is the depth to which the drainage area would be covered if all the water flowing from it in a given period were conserved and uniformly distributed on the surface. It is used for comparing run-off with rainfall, which is usually expressed in depth in inches. "Acre-foot...
Page 125 - CONVENIENT EQUIVALENTS The following is a list of convenient equivalents for use in hydraulic computations: Table for converting discharge in second-feet per square mile into run-off in depth in inches over the area NOTE. — For partial month, multiply the values for one day by the number of days.
Page 129 - States gallons per second; equals 448.8 gallons per minute ; equals 646,317 gallons for one day. 1 second-foot for one year covers 1 square mile 1.131 feet or 13.572 inches deep. 1 second-foot for one year equals 31,536,000 cubic feet. 1 second-foot equals about 1 acre-inch per hour. 1 second-foot for one day equals 86,400 cubic feet.
Page 130 - ... 1 cubic foot of water weighs 62.5 pounds. 1 cubic meter per minute equals 0.5886 second-foot. 1 horsepower equals 550 foot-pounds per second. 1 horsepower equals 76.0 kilogram-meters per second. 1 horsepower equals 746 watts. 1 horsepower equals 1 second-foot falling 8.80 feet.
Page 129 - States gallons equal 3.07 acre-feet. 1,000,000 cubic feet equal 22.95 acre-feet. 1 acre-foot equals 325,850 gallons. 1 inch deep on 1 square mile equals 2,323,200 cubic feet. 1 inch deep on 1 square mile equals 0.0737 second-foot per year. 1 foot equals 0.3048 meter. 1 mile equals 1.60935 kilometers. 1 mile equals 5,280 feet. 1 acre equals 0.4047 hectare. 1 acre equals 43,560 square feet. 1 acre equals 209 feet square, nearly. 1 square mile equals 2.59 square kilometers. 1 cubic foot equals 0.0283...
Page 129 - ... cubic feet. 1 cubic mile equals 4,667 second-feet for one year. 1 gallon equals 3.7854 liters. 1 gallon equals 8.36 pounds of water. 1 gallon equals 231 cubic inches (liquid measure). 1 pound equals 0.4536 kilogram. 1 avoirdupois pound equals 7.000 grains.
Page 4 - A gage near the edge of the roof, on the windward side of a building, shows less rainfall than one in the center of the roof. The vertical ascending current along the side of the wall extends slightly above the level of the roof, and part of the rain is carried away from the gage. In the center of a large, flat roof, at least 60 feet square, the rainfall collected by a gage does not differ materially from that collected at the level of the ground. A...
Page 4 - Within a few yards of each other two gages may show a difference of 20 per cent in the rainfall in a heavy rain storm. The stronger the wind the greater the difference is apt to be. In a high location eddies of wind produced by walls of buildings divert rain that would otherwise fall in the gage. A gage near the edge of the roof, on the windward side of a building, shows less rainfall than one in the center of the roof. The vertical ascending current along the side of the wall extends slightly above...
Page 129 - ... 1 acre equals 209 feet square, nearly. 1 square mile equals 2.59 square kilometers. 1 cubic foot equals 0.0283 cubic meter. 1 cubic foot equals 7.48 gallons. 1 cubic foot of water weighs 62.5 pounds. 1 cubic meter per minute equals 0.5886 second-foot.