Standard Precipitation Index Drought Forecasting Using Neural Networks, Wavelet Neural Networks, and Support Vector Regression

Table 2

Descriptive statistics for the Awash River Basin.

Basin	Station	Mean annual precipitation; (mm)	Max annual (1970–2005) precipitation; (mm)	Standard deviation; (mm)
Upper Awash Basin	Bantu Liben	91	647	111
	Tullo Bullo	94	575	114
	Ginchi	97	376	90
	Sebeta	111	1566	172
	Ejersalele	67	355	75
	Ziquala	100	583	110
	Debre Zeit	73	382	81
Middle Awash Basin	Koka	97	376	90
	Modjo	76	542	92
	Nazereth	73	470	85
	Wolenchiti	76	836	95
	Gelemsso	77	448	75
	Hirna	78	459	86
	Dire Dawa	51	267	54
	Meisso	61	361	61
Lower Awash Basin	Dubti	15	192	23
	Eliwuha	44	374	57
	Mersa	87	449	89
	Mille	26	268	40
	Bati	73	357	80