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<br />
<br />FREQUENCY CURVES
<br />
<br />precisely. Another type of frequency curve is
<br />prepared merely to describe the distribution
<br />of events by size; probability does not enter
<br />into the problem because the distribution of
<br />future events is not of interest. A well-known
<br />curve of this type is one showing the distribu-
<br />tion of particle sizes of a soil or sediment sample.
<br />
<br />References Cited
<br />
<br />Beard, L. R., 1943, Statistical analysis in hydrology:
<br />Am. Soc. Civil Engineers Trans., v. 108, p. 1110-
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<br />- 1962, Statistical methods in hydrology: U.S.
<br />Army Engineer District, Corps Engineers, Sacra-
<br />mento, Calif.
<br />-191':4, Estimating long.termstorage requirements
<br />and firm yield of rivers: Internat. Assoc. Sci. Hy-
<br />drology, General Assembly of Berkeley, Pub. 63,
<br />p. 151-166.
<br />Benson, M. A., 1960, Characteristics of frequency
<br />curves based on a theoretical I,ODO-year record,
<br />in Dalrymple, Tate, Flood frequency analyses:
<br />U.S. Geol. Survey Water-Supply Paper 1543-A,
<br />80 p.
<br />- 1962&, Factors influencing the occurrence of
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<br />Proc., v. 88 HY 6 p. 57-71, Paper 3317.
<br />Chow, V. T., 1954, The log-probability law and its
<br />engineering applications: Am. Soc. Civil Engineers
<br />Proc., v. 80, separate 536, p. 9.
<br />- 1964, Frequency analysis, in Chow, V. T.,
<br />Handbook of applied hydrology: New York,
<br />McGraw-Hill Book Co., p. 8-17,
<br />Dalrymple, Tate, 1960, Flood-frequency analyses: U.S.
<br />Geol. Survey Water-Supply Paper 1543-A, 80 p.
<br />Dixon, W. J., and Massey, F. J. 1957, Introduction
<br />to statistical analysis, 2d 00.: New York, McGraw-
<br />Hill Book Co.
<br />Gumbel, E. J., 1941, The return period of flood flows:
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<br />Bome practical applications: U.S. Dept. Commerce,
<br />
<br />15
<br />
<br />Natl. Bur. Standards Applied Mathematics Series
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<br />Gumbel, E. J., 1954b, Statistieal theory of droughts: Am.
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<br />Langbein, W. B., 1960, Plotting positions in frequency
<br />analysis, in Dalrymple, Tate, Flood frequency
<br />analysis: U.S. Geol. Survey Water-Supply Paper
<br />1543-A, p. 48-51.
<br />Matalas, N. C., 1963, Probability distribution of low
<br />fiows: U.S. Geol. Survey Prof. Paper 434-A, 27 p.
<br />Mood, A. M., 1950, Introduction to the theory of
<br />statistics: New York, McGraw-Hill Book Co., Inc.
<br />Powell, R. W., 1943, A simple method of estimating
<br />flood frequencies: Civil Eng., v. 13, no. 2, p. 105-
<br />106.
<br />Riggs. H. C., 1953, A method of forecasting low flow
<br />of streams: Am. Geophys. Union Trans., v. 34,
<br />no. 3, p. 427-434.
<br />- 1961, Frequency of natural events: Am. Soc.
<br />Civil Engineers Proc., v. 87, no. HYl, p. 15-26.
<br />- 1965, Estimating probability distributions of
<br />drought flows: Water and Sewage Works, v. 112,
<br />no. 5, p. 153-157.
<br />- 1967J Some statistical tools in hydrology: U.S.
<br />Geol. Survey Tech. Water-Resources Inv'l book 4,
<br />chap. Al (in press).
<br />Riggs, H. C., and Thomasj D. M.. 1965, Discussion
<br />of "Mathematical model for flood risk evaluation,"
<br />by Richard M. Shane and Walter R. Lynn: Am.
<br />Soc. Civil Engineers Proc., v. 91, no. HY5, p. 190-
<br />192.
<br />Searcy, J. K., 1959J Flow-dura.tion curves: U.S. Geol.
<br />8urvey Water Supply Paper 1542-A, 33 p.
<br />Stall, J. B., 1964, Low flows of Dlinois streams for
<br />impounding reservoir design: llIinois Sta.te Water
<br />Survey Bull. 51, 395 p.
<br />Stall, J. B., and Neill, J. C., 1961, A partial duration
<br />series for low flow analyses: Jour. Geophys.
<br />Research, v. 66, p. 4219-4225.
<br />
<br />..u. s. GOVERNMENT PRINTING OFFlCE : 1969 0 - 3:>3-230
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