| 年 | 丰水期(5~10月) | 枯水期(11月~次年4月) | 年 | 丰水期(5~10月) | 枯水期(11月~次年4月) | ||||
| 最枯月平均 流量(m3) | 频率% | 最枯月平均 流量(m3) | 频率% | 最枯月平均 流量(m3) | 频率% | 最枯月平均 流量(m3) | 频率% | ||
| 1980 | 5.71 | 50.00% | 3.09 | 50.00% | 2001 | 7.97 | 14.29% | 4.58 | 14.29% |
| 1981 | 5.02 | 71.43% | 2.85 | 71.43% | 2002 | 9.99 | 7.14% | 4.06 | 7.14% |
| 1982 | 5.20 | 64.29% | 2.50 | 64.29% | 2003 | 7.57 | 16.67% | 4.59 | 16.67% |
| 1983 | 4.64 | 78.57% | 2.44 | 78.57% | 2004 | 5.63 | 54.76% | 4.24 | 54.76% |
| 1984 | 3.91 | 88.10% | 2.80 | 88.10% | 2005 | 5.17 | 69.05% | 3.89 | 69.05% |
| 1985 | 3.38 | 95.24% | 2.50 | 95.24% | 2006 | 6.22 | 40.48% | 3.88 | 40.48% |
| 1986 | 3.16 | 97.62% | 1.85 | 97.62% | 2007 | 3.68 | 90.48% | 3.73 | 90.48% |
| 1987 | 4.66 | 76.19% | 2.23 | 76.19% | 2008 | 6.11 | 42.86% | 3.84 | 42.86% |
| 1988 | 5.60 | 57.14% | 2.47 | 57.14% | 2009 | 5.57 | 59.52% | 4.17 | 59.52% |
| 1989 | 7.33 | 21.43% | 2.60 | 21.43% | 2010 | 4.81 | 73.81% | 3.13 | 73.81% |
| 1990 | 4.27 | 83.33% | 2.90 | 83.33% | 2011 | 4.01 | 85.71% | 2.96 | 85.71% |
| 1991 | 5.21 | 61.90% | 2.67 | 61.90% | 2012 | 5.85 | 47.62% | 3.17 | 47.62% |
| 1992 | 5.18 | 66.67% | 3.60 | 66.67% | 2013 | 4.50 | 80.95% | 3.76 | 80.95% |
| 1993 | 3.66 | 92.86% | 3.34 | 92.86% | 2014 | 6.00 | 45.24% | 3.19 | 45.24% |
| 1994 | 7.17 | 23.81% | 2.92 | 23.81% | 2015 | 10.00 | 4.76% | 3.61 | 4.76% |
| 1995 | 6.45 | 33.33% | 3.68 | 33.33% | 2016 | 5.69 | 52.38% | 3.27 | 52.38% |
| 1996 | 7.17 | 26.19% | 3.51 | 26.19% | 2017 | 9.04 | 11.90% | 3.03 | 11.90% |
| 1997 | 6.98 | 28.57% | 4.16 | 28.57% | 2018 | 6.45 | 38.10% | 4.54 | 38.10% |
| 1998 | 6.96 | 30.95% | 3.88 | 30.95% | 2019 | 12.50 | 2.38% | 3.00 | 2.38% |
| 1999 | 6.45 | 35.71% | 4.08 | 35.71% | 2020 | 7.47 | 19.05% | 5.23 | 19.05% |
| 2000 | 9.34 | 9.52% | 4.90 | 9.52% |
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