|
| Rank | Year | | Annual Flow | 3-Year Mean |
| 1949 | -662688000000 | 74.6 |
|
| 1950 | -631152000000 | 83.1 |
|
| 1951 | -599616000000 | 94.5 |
84.1 |
| 1952 | -568080000000 | 145.8 |
107.8 |
| 1953 | -536457600000 | 60.9 |
100.4 |
| 1954 | -504921600000 | 34.3 |
80.3 |
| 1955 | -473385600000 | 34.7 |
43.3 |
| 1956 | -441849600000 | 111.7 |
60.2 |
| 1957 | -410227200000 | 88.2 |
78.2 |
| 1958 | -378691200000 | 92.5 |
97.5 |
| 1959 | -347155200000 | 20.2 |
67.0 |
| 1960 | -315619200000 | 38.4 |
50.3 |
| 1961 | -283996800000 | 48.5 |
35.7 |
| 1962 | -252460800000 | 117.5 |
68.1 |
| 1963 | -220924800000 | 85.5 |
83.9 |
| 1964 | -189388800000 | 103.2 |
102.1 |
| 1965 | -157766400000 | 119.0 |
102.6 |
| 1966 | -126230400000 | 44.5 |
88.9 |
| 1967 | -94694400000 | 86.6 |
83.3 |
| 1968 | -63158400000 | 55.1 |
62.1 |
| 1969 | -31536000000 | 106.4 |
82.7 |
| 1970 | 0000 | 94.7 |
85.4 |
| 1971 | 31536000000 | 163.4 |
121.5 |
| 1972 | 63072000000 | 70.8 |
109.6 |
| 1973 | 94694400000 | 123.9 |
119.4 |
| 1974 | 126230400000 | 71.3 |
88.7 |
| 1975 | 157766400000 | 164.6 |
119.9 |
| 1976 | 189302400000 | 66.2 |
100.7 |
| 1977 | 220924800000 | 46.0 |
92.3 |
| 1978 | 252460800000 | 82.2 |
64.8 |
| 1979 | 283996800000 | 116.7 |
81.6 |
| 1980 | 315532800000 | 123.8 |
107.6 |
| 1981 | 347155200000 | 34.4 |
91.6 |
| 1982 | 378691200000 | 80.0 |
79.4 |
| 1983 | 410227200000 | | |
|---|
| 1984 | 441763200000 | | |
|---|
| 1985 | 473385600000 | | |
|---|
| 1986 | 504921600000 | | |
|---|
| 1987 | 536457600000 | | |
|---|
| 1988 | 567993600000 | | |
|---|
| 1989 | 599616000000 | 61.0 |
|
| 1990 | 631152000000 | 44.0 |
|
| 1991 | 662688000000 | 49.7 |
51.6 |
| 1992 | 694224000000 | 26.2 |
40.0 |
| 1993 | 725846400000 | 78.2 |
51.4 |
| 1994 | 757382400000 | 47.5 |
50.6 |
| 1995 | 788918400000 | 146.0 |
90.6 |
| 1996 | 820454400000 | 114.8 |
102.8 |
| 1997 | 852076800000 | 128.8 |
129.9 |
| 1998 | 883612800000 | 169.8 |
137.8 |
| 1999 | 915148800000 | 97.0 |
131.9 |
| 2000 | 946684800000 | 59.9 |
108.9 |
| 2001 | 978307200000 | 36.6 |
64.5 |
| 2002 | 1009843200000 | 56.1 |
50.8 |
| 2003 | 1041379200000 | 56.6 |
49.8 |
| 2004 | 1072915200000 | 46.6 |
53.1 |
| 2005 | 1104537600000 | 198.0 |
100.4 |
| 2006 | 1136073600000 | 158.9 |
134.5 |
| 2007 | 1167609600000 | 45.1 |
134.0 |
| 2008 | 1199145600000 | 49.0 |
84.4 |
| 2009 | 1230768000000 | 78.3 |
57.5 |
| 2010 | 1262304000000 | 74.3 |
67.2 |
| 2011 | 1293840000000 | 151.1 |
101.2 |
| 2012 | 1325376000000 | 30.4 |
85.3 |
| 2013 | 1356998400000 | 18.9 |
66.8 |
| 2014 | 1388534400000 | 44.6 |
31.3 |
| 2015 | 1420070400000 | 39.8 |
34.4 |
| 2016 | 1451606400000 | 107.8 |
64.1 |
| 2017 | 1483228800000 | 154.7 |
100.8 |
| 2018 | 1514764800000 | 41.3 |
101.3 |
| 2019 | 1546300800000 | 178.4 |
124.8 |
| 2020 | 1577836800000 | 34.2 |
84.6 |
| 2021 | 1609459200000 | 23.6 |
78.7 |
| 2022 | 1640995200000 | 24.0 |
27.3 |
| 2023 | 1672531200000 | 136.5 |
61.4 |
| 2024 | 1704067200000 | 99.0 |
86.5 |
| 2025 | 1735689600000 | 58.6 |
98.0 |
| 2026 | 1767225600000 |
24.5 |
60.7 |
| Rank | Year | | Seasonal Flow | 3-Year Mean |
| 1949 | -662688000000 | 63.8 |
|
| 1950 | -631152000000 | 66.2 |
|
| 1951 | -599616000000 | 68.9 |
66.3 |
| 1952 | -568080000000 | 132.3 |
89.1 |
| 1953 | -536457600000 | 46.8 |
82.7 |
| 1954 | -504921600000 | 22.9 |
67.4 |
| 1955 | -473385600000 | 29.5 |
33.1 |
| 1956 | -441849600000 | 87.5 |
46.6 |
| 1957 | -410227200000 | 77.7 |
64.9 |
| 1958 | -378691200000 | 76.5 |
80.6 |
| 1959 | -347155200000 | 11.2 |
55.1 |
| 1960 | -315619200000 | 29.8 |
39.2 |
| 1961 | -283996800000 | 40.2 |
27.1 |
| 1962 | -252460800000 | 94.7 |
54.9 |
| 1963 | -220924800000 | 76.6 |
70.5 |
| 1964 | -189388800000 | 89.4 |
86.9 |
| 1965 | -157766400000 | 90.7 |
85.6 |
| 1966 | -126230400000 | 24.5 |
68.2 |
| 1967 | -94694400000 | 73.5 |
62.9 |
| 1968 | -63158400000 | 43.2 |
47.1 |
| 1969 | -31536000000 | 81.8 |
66.2 |
| 1970 | 0000 | 75.4 |
66.8 |
| 1971 | 31536000000 | 133.9 |
97.0 |
| 1972 | 63072000000 | 42.8 |
84.0 |
| 1973 | 94694400000 | 98.2 |
91.6 |
| 1974 | 126230400000 | 47.7 |
62.9 |
| 1975 | 157766400000 | 144.0 |
96.6 |
| 1976 | 189302400000 | 41.7 |
77.8 |
| 1977 | 220924800000 | 33.5 |
73.1 |
| 1978 | 252460800000 | 65.9 |
47.0 |
| 1979 | 283996800000 | 83.4 |
60.9 |
| 1980 | 315532800000 | 106.6 |
85.3 |
| 1981 | 347155200000 | 22.3 |
70.8 |
| 1982 | 378691200000 | 60.5 |
63.1 |
| 1983 | 410227200000 | | |
|---|
| 1984 | 441763200000 | | |
|---|
| 1985 | 473385600000 | | |
|---|
| 1986 | 504921600000 | | |
|---|
| 1987 | 536457600000 | | |
|---|
| 1988 | 567993600000 | | |
|---|
| 1989 | 599616000000 | 42.5 |
|
| 1990 | 631152000000 | 33.5 |
|
| 1991 | 662688000000 | 43.1 |
39.7 |
| 1992 | 694224000000 | 14.8 |
30.5 |
| 1993 | 725846400000 | 60.6 |
39.5 |
| 1994 | 757382400000 | 39.4 |
38.3 |
| 1995 | 788918400000 | 128.4 |
76.1 |
| 1996 | 820454400000 | 83.0 |
83.6 |
| 1997 | 852076800000 | 98.9 |
103.4 |
| 1998 | 883612800000 | 149.1 |
110.3 |
| 1999 | 915148800000 | 75.9 |
108.0 |
| 2000 | 946684800000 | 43.1 |
89.4 |
| 2001 | 978307200000 | 27.0 |
48.7 |
| 2002 | 1009843200000 | 51.5 |
40.5 |
| 2003 | 1041379200000 | 50.8 |
43.1 |
| 2004 | 1072915200000 | 39.1 |
47.1 |
| 2005 | 1104537600000 | 175.6 |
88.5 |
| 2006 | 1136073600000 | 130.7 |
115.1 |
| 2007 | 1167609600000 | 34.0 |
113.4 |
| 2008 | 1199145600000 | 40.7 |
68.5 |
| 2009 | 1230768000000 | 68.6 |
47.8 |
| 2010 | 1262304000000 | 67.6 |
59.0 |
| 2011 | 1293840000000 | 131.5 |
89.2 |
| 2012 | 1325376000000 | 19.1 |
72.8 |
| 2013 | 1356998400000 | 14.8 |
55.2 |
| 2014 | 1388534400000 | 36.4 |
23.4 |
| 2015 | 1420070400000 | 31.6 |
27.6 |
| 2016 | 1451606400000 | 86.4 |
51.4 |
| 2017 | 1483228800000 | 116.1 |
78.0 |
| 2018 | 1514764800000 | 31.6 |
78.0 |
| 2019 | 1546300800000 | 160.2 |
102.6 |
| 2020 | 1577836800000 | 22.1 |
71.3 |
| 2021 | 1609459200000 | 19.2 |
67.2 |
| 2022 | 1640995200000 | 18.7 |
20.0 |
| 2023 | 1672531200000 | 120.2 |
52.7 |
| 2024 | 1704067200000 | 79.1 |
72.7 |
| 2025 | 1735689600000 | 47.1 |
82.1 |
| 2026 | 1767225600000 |
14.5 |
46.9 |
|