Sub-basin | Stations | Accumulation periods | Duration | Magnitude | Intensity | Peak value |
---|---|---|---|---|---|---|
Central | Bele | SPI-4 | May 1990–Feb 1991 | − 13.35 | − 1.34 | − 2.39 |
SPI-12 | Jul 2002–Jul 2003 | − 23.89 | − 1.84 | − 2.27 | ||
SPEI-4 | Jun1990–Jan1992 | − 21.39 | − 1.1 | − 2.16 | ||
SPEI-12 | Jul 1990–Dec 1991 | − 25.81 | − 1.36 | − 2.32 | ||
Bonga | SPI-4 | Aug 1996–Sep 1997 | − 30.99 | − 2.20 | − 3.61 | |
SPI-12 | Oct 1994–Dec 1995 | − 20.20 | − 1.35 | − 3.37 | ||
SPEI-4 | Aug 1996–Aug 1997 | − 21.59 | − 1.66 | − 2.28 | ||
SPEI-12 | Dec 2010–Sep 2013 | − 44.32 | − 1.30 | − 2.36 | ||
Jimma | SPI-4 | Aug 2003–Aug 2004 | − 14.27 | − 1.1 | − 3.37 | |
SPI-12 | Jun 2011–Apr 2013 | − 27.28 | − 1.19 | − 2.41 | ||
SPEI-4 | Aug 2003–Sep 2004 | − 17.36 | − 1.24 | − 2.29 | ||
SPEI-12 | Jun 2011–Dec 2013 | − 34.16 | − 1.10 | − 2.27 | ||
Shebe | SPI-4 | Feb 2002–Dec 2002 | − 24.35 | − 2.20 | − 3.62 | |
SPI-12 | Apr1994–Dec 1995 | − 29.38 | − 1.40 | − 3.74 | ||
SPEI-4 | Oct 1994–Oct 1995 | − 20.80 | − 1.39 | − 2.29 | ||
SPEI-12 | Jan 1994–Apr 1996 | − 45.40 | − 2.24 | − 2.11 | ||
Yayaotona | SPI-4 | Feb 2000–Sep 2000 | − 10.89 | − 1.36 | − 2.85 | |
SPI-12 | Apr 1999–Feb 2001 | − 31.75 | − 1.38 | − 2.19 | ||
SPEI-4 | Feb 2000–Sep 2000 | − 10.69 | − 1.33 | − 2.23 | ||
SPEI-12 | Apr 1999–Feb 2001 | − 33.64 | − 1.46 | − 1.97 |