Hydrological and Meteorological Drought Monitoring and Trend Analysis in Abbay River Basin, Ethiopia

Table 5

Severe and extreme drought years in the Abbay river basin during 1973–2014 in SDI12.

Station	Drought year	Magnitude	Frequency (%)	Drought category
Bahir Dar	1984	−2.29	2.44	Extreme
	2010	−1.98	2.44	Severe
Border	1979	−1.62	4.88	Severe
	1983	−2.11		Extreme
	1984	−2.47	4.88	Extreme
	1987	−1.5		Severe
Gilgel Beles	1982	−2.35	2.44	Extreme
	1983	−1.66		Severe
	1984	−1.5	9.76	Severe
	2008	−1.59		Severe
Gummera	1978	−1.84	4.88	Severe
	1983	−1.66		Severe
Kessie	1979	−1.52	9.76	Severe
	1981	−1.53		Severe
	1983	−2.21	2.44	Extreme
	1984	−1.91		Severe
	1986	−1.69		Severe
Chemoga	1994	−1.63	2.78	Severe
	2001	−2.94	2.78	Extreme
Guder	1994	−1.52	5.56	Severe
	2002	−1.6		Severe
Robigumera	1983	−1.79	11.54	Severe
	1988	−1.61		Severe
	1991	−1.89		Severe