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Platte River Ecosystem Resources and Management, with Emphasis on the Big Bend Reach in Nebraska

Tables

Table 16. Wet, average, and dry years based upon mean annual flow at Grand Island, 1942-1993 (M. Butler, USFWS, personal communication). Mean annual flow is ranked from highest to lowest for 1943-1992. The lowest 25 percent of the ranking were labeled dry years, while the upper 33 percent were termed wet years. The remaining years are average. The historic flows were partitioned into wet, average, and dry years accoriding to the 33 percent, 42 percent, and 25 percent distribution.

Water Year	Mean CFS	Percentile	Count
Wet Conditions
1983	5,380	2.00	16
1984	5,359	4.00
1973	3,715	6.00
1974	3,257	8.00
1985	2,808	10.00
1987	2,721	12.00
1971	2,691	14.00
1980	2,655	16.00
1986	2,642	18.00
1949	1,910	20.00
1952	1,879	22.00
1947	1,734	24.00
1970	1,703	26.00
1988	1,688	28.00
1951	1,635	30.00
1972	1,616	32.00
Average Conditions
1967	1,426	34.00	21
1966	1,404	36.00
1969	1,376	38.00
1962	1,365	40.00
1958	1,341	42.00
1965	1,260	44.00
1948	1,199	46.00
1979	1,182	48.00
1950	1,179	50.00
1960	1,163	52.00
1989	1,153	54.00
1990	1,121	56.00
1945	1,119	58.00
1975	1,086	60.00
1944	1,067	62.00
1977	1,042	64.00
1943	1,039	66.00
1968	1,008	68.00
1982	1,005	70.00
1976	978	72.00
1978	974	74.00
Dry Conditions
1963	957	76.00	13
1953	941	78.00
1992	928	80.00
1946	909	82.00
1959	872	84.00
1981	825	86.00
1961	806	88.00
1991	786	90.00
1964	709	92.00
1954	702	94.00
1957	698	96.00
1955	570	98.00
1956	414	100.00

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