Water-supply PaperU.S. Government Printing Office, 1908 |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
1925 Date Gage 1925 Discharge ACCURACY.-Stage-discharge relation acre-feet Maximum Minimum affected by ice applying mean daily ascertained by applying boulders Calif canal CHANNEL charge Date Gage concrete County Creek curve well defined Daily discharge ascertained daily gage height Date Gage Dis December January February Discharge in second-feet Discharge measurements DISCHARGE MEASUREMENTS.—Made diverted DRAINAGE East ending September 30 estimated EXTREMES OF DISCHARGE.—Maximum February March April feet flow foot furnished GAGE.—Water-stage recorder gravel height charge Date height to rating irrigation January February March July August September June July Aug Lake left bank LOCATION.-In Maximum Minimum Mean Maximum stage recorded mean daily gage MEASUREMENTS.—Made from cable minimum stage Monthly discharge mouth November December January October November December Oreg periods rating table Reservoir right bank River Run-off in acre-feet sand Sec.-ft second-feet Month Run-off Sept South Fork station stream United Valley wading water-stage recorder
Beliebte Passagen
Seite 356 - 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...
Seite 8 - Maximum" gives the mean flow, as determined from the rating table, 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...
Seite 5 - For gaging the streams and determining the water supply of the United States, and for the investigation of underground currents and artesian wells, and for the preparation of reports upon the best methods of utilizing the water resources.
Seite 5 - That this officer shall have the direction of the Geological Survey, and the classification of the public lands and examination of the Geological Structure, mineral resources and products of the national domain...
Seite 356 - 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 which represent a rate of flow, as secondfeet, gallons per minute, miner's...
Seite 9 - The monthly means for any station may represent with high acctij racy the quantity of water flowing past the gage, but the figures showing discharge per square mile and depth of run-off in inches may be subject to gross errors caused by the inclusion of large...
Seite 7 - January in most parts of the United States much of the precipitation in the preceding three months is stored as ground water in the form of snow or ice, or in ponds, lakes, and swamps, and this stored water passes off in the streams during the spring break-up; at...
Seite 8 - ACCURACY OF FIELD DATA AND COMPUTED RESULTS The accuracy of streamflow data depends primarily on (1) the stability of the stage-discharge relation or, if the control is unstable, the frequency of discharge measurements, and (2) the accuracy of observations of stage, measurements of discharge, and interpretation of records. The station description states the degree of accuracy of the records.
Seite 8 - In the table of monthly discharge the column headed "Maximum" gives the mean flow 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.
Seite 356 - Run-off in inches" is the depth to which an area would be covered if all the water flowing from it in a given period were uniformly distributed on the surface. It is used for comparing run-off with rainfall, which is usually expressed in depth in inches. An "acre-foot," equivalent to 43,560 cubic feet, is the quantity required to cover an acre to the depth of 1 foot.