|
| Rank | Year | | Annual Flow | 3-Year Mean |
| 1949 | -662688000000 | 50.3 |
|
| 1950 | -631152000000 | 23.1 |
|
| 1951 | -599616000000 | 56.0 |
43.1 |
| 1952 | -568080000000 | 96.7 |
58.6 |
| 1953 | -536457600000 | 74.8 |
75.9 |
| 1954 | -504921600000 | 80.7 |
84.1 |
| 1955 | -473385600000 | 27.3 |
60.9 |
| 1956 | -441849600000 | 135.4 |
81.1 |
| 1957 | -410227200000 | 40.1 |
67.6 |
| 1958 | -378691200000 | 205.2 |
126.9 |
| 1959 | -347155200000 | 34.3 |
93.2 |
| 1960 | -315619200000 | 42.5 |
94.0 |
| 1961 | -283996800000 | 37.8 |
38.2 |
| 1962 | -252460800000 | 39.1 |
39.8 |
| 1963 | -220924800000 | 76.7 |
51.2 |
| 1964 | -189388800000 | 17.4 |
44.4 |
| 1965 | -157766400000 | 122.1 |
72.1 |
| 1966 | -126230400000 | 62.9 |
67.5 |
| 1967 | -94694400000 | 103.9 |
96.3 |
| 1968 | -63158400000 | 43.5 |
70.1 |
| 1969 | -31536000000 | 126.2 |
91.2 |
| 1970 | 0000 | 96.6 |
88.8 |
| 1971 | 31536000000 | 77.7 |
100.1 |
| 1972 | 63072000000 | 18.4 |
64.2 |
| 1973 | 94694400000 | 115.4 |
70.5 |
| 1974 | 126230400000 | 145.0 |
92.9 |
| 1975 | 157766400000 | 89.7 |
116.7 |
| 1976 | 189302400000 | 10.1 |
81.6 |
| 1977 | 220924800000 | 4.8 |
34.9 |
| 1978 | 252460800000 | 133.4 |
49.4 |
| 1979 | 283996800000 | 37.7 |
58.6 |
| 1980 | 315532800000 | 91.6 |
87.5 |
| 1981 | 347155200000 | 51.4 |
60.2 |
| 1982 | 378691200000 | 105.4 |
82.8 |
| 1983 | 410227200000 | 219.3 |
125.4 |
| 1984 | 441763200000 | 78.0 |
134.2 |
| 1985 | 473385600000 | 34.2 |
110.5 |
| 1986 | 504921600000 | 112.4 |
74.9 |
| 1987 | 536457600000 | 18.0 |
54.9 |
| 1988 | 567993600000 | 44.0 |
58.1 |
| 1989 | 599616000000 | 30.4 |
30.8 |
| 1990 | 631152000000 | 14.1 |
29.5 |
| 1991 | 662688000000 | 27.9 |
24.1 |
| 1992 | 694224000000 | 56.3 |
32.8 |
| 1993 | 725846400000 | 102.0 |
62.1 |
| 1994 | 757382400000 | 15.8 |
58.1 |
| 1995 | 788918400000 | 184.3 |
100.7 |
| 1996 | 820454400000 | 80.5 |
93.6 |
| 1997 | 852076800000 | 83.6 |
116.1 |
| 1998 | 883612800000 | 209.5 |
124.5 |
| 1999 | 915148800000 | 64.5 |
119.2 |
| 2000 | 946684800000 | 82.0 |
118.6 |
| 2001 | 978307200000 | 48.4 |
65.0 |
| 2002 | 1009843200000 | 65.5 |
65.3 |
| 2003 | 1041379200000 | 100.8 |
71.6 |
| 2004 | 1072915200000 | 89.5 |
85.3 |
| 2005 | 1104537600000 | 120.3 |
103.6 |
| 2006 | 1136073600000 | 139.4 |
116.4 |
| 2007 | 1167609600000 | 18.8 |
92.8 |
| 2008 | 1199145600000 | 48.7 |
69.0 |
| 2009 | 1230768000000 | 27.0 |
31.5 |
| 2010 | 1262304000000 | 83.5 |
53.1 |
| 2011 | 1293840000000 | 72.4 |
61.0 |
| 2012 | 1325376000000 | 21.8 |
59.2 |
| 2013 | 1356998400000 | 32.5 |
42.2 |
| 2014 | 1388534400000 | 10.4 |
21.6 |
| 2015 | 1420070400000 | 40.2 |
27.7 |
| 2016 | 1451606400000 | 62.1 |
37.6 |
| 2017 | 1483228800000 | 125.6 |
75.9 |
| 2018 | 1514764800000 | 8.2 |
65.3 |
| 2019 | 1546300800000 | 120.5 |
84.7 |
| 2020 | 1577836800000 | 7.7 |
45.5 |
| 2021 | 1609459200000 | 3.8 |
44.0 |
| 2022 | 1640995200000 | 12.8 |
8.1 |
| 2023 | 1672531200000 | 103.9 |
40.2 |
| 2024 | 1704067200000 | 87.6 |
68.1 |
| 2025 | 1735689600000 | 87.7 |
93.1 |
| 2026 | 1767225600000 |
89.8 |
88.3 |
| Rank | Year | | Seasonal Flow | 3-Year Mean |
| 1949 | -662688000000 | 16.2 |
|
| 1950 | -631152000000 | 6.2 |
|
| 1951 | -599616000000 | 9.1 |
10.5 |
| 1952 | -568080000000 | 25.0 |
13.4 |
| 1953 | -536457600000 | 14.4 |
16.2 |
| 1954 | -504921600000 | 21.5 |
20.3 |
| 1955 | -473385600000 | 10.9 |
15.6 |
| 1956 | -441849600000 | 25.6 |
19.3 |
| 1957 | -410227200000 | 11.5 |
16.0 |
| 1958 | -378691200000 | 44.3 |
27.1 |
| 1959 | -347155200000 | 5.1 |
20.3 |
| 1960 | -315619200000 | 7.6 |
19.0 |
| 1961 | -283996800000 | 6.4 |
6.4 |
| 1962 | -252460800000 | 9.7 |
7.9 |
| 1963 | -220924800000 | 28.6 |
14.9 |
| 1964 | -189388800000 | 2.7 |
13.7 |
| 1965 | -157766400000 | 36.4 |
22.6 |
| 1966 | -126230400000 | 10.6 |
16.6 |
| 1967 | -94694400000 | 35.7 |
27.6 |
| 1968 | -63158400000 | 6.0 |
17.4 |
| 1969 | -31536000000 | 31.0 |
24.2 |
| 1970 | 0000 | 6.4 |
14.5 |
| 1971 | 31536000000 | 14.7 |
17.4 |
| 1972 | 63072000000 | 4.1 |
8.4 |
| 1973 | 94694400000 | 19.2 |
12.7 |
| 1974 | 126230400000 | 29.3 |
17.5 |
| 1975 | 157766400000 | 25.8 |
24.8 |
| 1976 | 189302400000 | 3.9 |
19.7 |
| 1977 | 220924800000 | 1.8 |
10.5 |
| 1978 | 252460800000 | 20.9 |
8.9 |
| 1979 | 283996800000 | 11.6 |
11.4 |
| 1980 | 315532800000 | 12.0 |
14.8 |
| 1981 | 347155200000 | 7.8 |
10.4 |
| 1982 | 378691200000 | 25.0 |
14.9 |
| 1983 | 410227200000 | 50.6 |
27.8 |
| 1984 | 441763200000 | 5.8 |
27.1 |
| 1985 | 473385600000 | 7.3 |
21.3 |
| 1986 | 504921600000 | 10.0 |
7.7 |
| 1987 | 536457600000 | 3.9 |
7.1 |
| 1988 | 567993600000 | 10.4 |
8.1 |
| 1989 | 599616000000 | 6.6 |
7.0 |
| 1990 | 631152000000 | 4.7 |
7.2 |
| 1991 | 662688000000 | 11.6 |
7.6 |
| 1992 | 694224000000 | 12.4 |
9.6 |
| 1993 | 725846400000 | 26.8 |
16.9 |
| 1994 | 757382400000 | 3.9 |
14.4 |
| 1995 | 788918400000 | 32.5 |
21.1 |
| 1996 | 820454400000 | 14.1 |
16.8 |
| 1997 | 852076800000 | 4.8 |
17.1 |
| 1998 | 883612800000 | 67.5 |
28.8 |
| 1999 | 915148800000 | 23.9 |
32.1 |
| 2000 | 946684800000 | 25.9 |
39.1 |
| 2001 | 978307200000 | 8.8 |
19.6 |
| 2002 | 1009843200000 | 7.4 |
14.0 |
| 2003 | 1041379200000 | 25.7 |
14.0 |
| 2004 | 1072915200000 | 9.8 |
14.3 |
| 2005 | 1104537600000 | 46.7 |
27.4 |
| 2006 | 1136073600000 | 56.2 |
37.6 |
| 2007 | 1167609600000 | 2.8 |
35.2 |
| 2008 | 1199145600000 | 11.2 |
23.4 |
| 2009 | 1230768000000 | 6.4 |
6.8 |
| 2010 | 1262304000000 | 33.8 |
17.1 |
| 2011 | 1293840000000 | 29.2 |
23.1 |
| 2012 | 1325376000000 | 10.3 |
24.5 |
| 2013 | 1356998400000 | 4.3 |
14.6 |
| 2014 | 1388534400000 | 2.8 |
5.8 |
| 2015 | 1420070400000 | 1.3 |
2.8 |
| 2016 | 1451606400000 | 7.0 |
3.7 |
| 2017 | 1483228800000 | 21.7 |
10.0 |
| 2018 | 1514764800000 | 3.7 |
10.8 |
| 2019 | 1546300800000 | 28.8 |
18.1 |
| 2020 | 1577836800000 | 1.0 |
11.2 |
| 2021 | 1609459200000 | 0.7 |
10.2 |
| 2022 | 1640995200000 | 1.7 |
1.1 |
| 2023 | 1672531200000 | 30.1 |
10.8 |
| 2024 | 1704067200000 | 24.2 |
18.7 |
| 2025 | 1735689600000 | 11.8 |
22.0 |
| 2026 | 1767225600000 |
11.8 |
15.9 |
|