## Water-supply and Irrigation Papers of the United States Geological Survey, Bände 166-171 |

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abutment attached August basin bench mark Branch bridge channel channel is straight charge County Creek curve Daily gage height Date datum defined depth determined Discharge in second-feet Discharge measurements downstream side Drainage area drainage basin east elevation equals Estimated monthly discharge fall February flood flow foot gaging station Geological Survey Hall highway bridge Hydrographer inches initial point iron January July June Lake left bank length located lower March Maximum mean mean velocity meter method Month North November October overflow point for soundings rating table records Report right bank River rock Run-off second-feet Sept September South span Square Feet square miles stages station was established stream surface tree United States Geological vertical Water-Supply Papers West width

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Seite 2 - 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.

Seite 4 - 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

Seite 107 - The serial publications of the United States Geological Survey consist of ( 1 ) Annual Reports, (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topographic Atlas of United States — folios and separate sheets thereof, (8) Geologic Atlas of the United States — folios thereof.

Seite 1 - DEFINITION OF TERMS. . The volume of water flowing in a stream — ^the "run-off" or "discharge" — is expressed in various terms, each of which has become associated with a certain class of work. These terms may be divided into two groups — (1) those...

Seite 3 - ... discharge" — is expressed in various terms, each of which has become associated with a certain class of work. These terms may be divided into two groups: (1) Those which represent a rate of flow, as secondfeet, gallons per minute, miner's inches, and run-off in second-feet per square mile, and (2) those which represent the actual quantity of water, as run-off in depth in inches and acre-feet. They may be defined as follows: "Second-foot...

Seite 3 - British imperial gallons per second. 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.

Seite 9 - ... is developed. This curve shows graphically the magnitude and changes in velocity from the surface to the bottom of the stream. The mean velocity in the vertical is then obtained by dividing the area bounded by this velocity curve and its axis by the depth.

Seite 2 - ... for the day when the mean gage height was highest. As the gage height is the mean for the day, it does not indicate correctly the stage when the water surface was at crest height, and the corresponding discharge was consequently larger than given in the maximum column. Likewise, in the column of "Minimum" the quantity given is the mean flow for the day when the mean gage height was lowest. The column headed "Mean" is the average flow in cubic feet for each second during the month.