| 干旱 年份 | 起始时间 年-月 | SRIs | SRIns | |||
|---|---|---|---|---|---|---|
| S | D | S | D | |||
| 1961 | 1961-6 | 3.23 | 4 | 4.44 | 4 | |
| 1970 | 1970-1 | 7.42 | 11 | 7.84 | 10 | |
| 1977 | 1977-2 | 15.06 | 16 | 17.61 | 15 | |
| 1983 | 1983-2 | 27.14 | 26 | 37.01 | 26 | |
| 1990 | 1990-8 | 22.63 | 28 | 47.17 | 33 | |
| 1997 | 1997-9 | 0.00 | 0 | 6.51 | 8 | |
| 1999 | 1999-3 | 0.33 | 3 | 1.52 | 4 | |
| 2006 | 2006-7 | 0.00 | 0 | 3.40 | 5 | |
| 2009 | 2008-9 | 2.52 | 6 | 10.50 | 15 | |
