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" ... depth will give (closely) the mean velocity in the vertical. Actual observations under a wide range of conditions show that this... "
Water-supply and Irrigation Papers of the United States Geological Survey - Seite 13
von Geological Survey (U.S.) - 1905
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Bulletin, Ausgaben 8-18;Ausgabe 20

North Carolina. Division of Mineral Resources - 1899 - 812 Seiten
...ice. In the second multiple-point method the meter is held successively at 0.2 and 0.8 of the depth and the mean of the velocities at these two points is taken as the mean velocity for that vertical. Assuming that the vertical velocity-curve is a common parabola with horizontal axis, the mean of the...
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Congressional Serial Set

1905 - 1360 Seiten
...the second multiple-point method the meter is held from 0.5 to 1 foot below the surface and about 0.5 foot above the bottom, and the mean of the velocities at these two points is token as the mean velocity for that vertical. This method is not well adapted for general work, as...
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Congressional Serial Set

1906 - 1176 Seiten
...ice. In the sccond multiple-point method the meter is held successively at 0.2 and 0.8 of the depth and the mean of the velocities at these two points is taken as the mean velocity for that vertical. On the assumption that the vertical velocity curve is a common paralxila with horizontal axis, the...
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Water-supply Paper, Bände 315-318

1913 - 996 Seiten
...comparison. In the second multiple-point method the meter is held successively at 0.2 and 0.8 depth, and the mean of the velocities at these two points is taken as the mean velocity for that vertical. On the assumption that the vertical velocity curve is a common parabola with horizontal axis, the mean...
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Water-supply Paper, Bände 250-252

1910 - 1010 Seiten
...under ice. In the second multiple-point method the meter is held successively at 0.2 and 0.8 depth, and the mean of the velocities at these two points is taken as the mean velocity for that vertical. (See PI. 1,5.) On the assumption that the vertical velocity curve is a common parabola with horizontal...
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United States Congressional Serial Set

1908 - 1444 Seiten
...conditions, and, moreover, the indications are that it holds nearly as well for ice-covered rivers. In the third multiple-point method the meter is held at mid depth, 8591— IRR 213—07 2 at 0.5 foot below the surface, and at 0.5 foot above the bottom, and the mean...
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Surface Water Supply of the United States 1907-8: Part VI. Missouri River Basin

Robert Follansbee - 1910 - 356 Seiten
...under ice. ln the second multiple-point method the meter is held successively at 0.2 and 0.8 depth, and the mean of the velocities at these two points is taken as the mean velocity for that vertical, lSee Pl. l.1 On the assumption that the vertical velocity curve is a common parabola with horizontal...
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Congressional Serial Set

1911 - 522 Seiten
...under ice. In the second multiple-point method the meter is held successively at 0.2 and 0.8 depth, and the mean of the velocities at these two points is taken as the mean velocity for that vertical. (See PI. I, A.) On the assumption that the vertical velocity curve is a common parabola with horizontal...
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Report of the Water Resources Investigation of Minnesota, 1909-1910 ..., Band 1

Minnesota. State Drainage Commission - 1912 - 650 Seiten
...under ice. In the second multiple-point method the meter is held successively at 0.2 and 0.8 depth, and the mean of the velocities at these two points is taken as the mean velocity for that vertical. On the assumption that the vertical velocity curve is a common parabola with horizontal axis, the mean...
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Bulletin, Ausgaben 19-20

1904 - 470 Seiten
...ice. In the second multiple-point method the meter is held successively at 0.2 and 0.8 of the depth and the mean of the velocities at these two points is taken as the mean velocity for that vertical. Assuming that the vertical velocity-curve is a common parabola with horizontal axis, the mean of the...
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