Hydrological Drought Assessment of Energy-Based Water Deficit Index (EWDI) at Different Geographical Regions

Table 3

Error matrix result for Australia (Brisbane site) during 2001–2010.

Brisbane	Streamflow		Sum	Drought accuracy (%)	Overall accuracy (%)
	Drought	No drought
Moderate drought (Streamflowlower quartile = 0.04784 cfs)
ESI				45/52 = 86.54	100/120 = 83.33
Drought	45	7	52
No drought	13	55	68
Sum	58	62	120
EWDI				54/57 = 94.74	113/120 = 94.17
Drought	54	3	57
No drought	4	59	63
Sum	58	62	120
SPI-3				39/56 = 69.64	84/120 = 70.00
Drought	39	17	56
No drought	19	45	64
Sum	58	62	120
VCI				29/57 = 50.88	91/120 = 75.83
Drought	29	28	57
No drought	1	62	63
Sum	30	90	120