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

Table 2

Error matrix result for Korean Peninsula (Hamheung site) during 2001–2010.

Hamheung	Streamflow		Sum	Drought accuracy (%)	Overall accuracy (%)
	Drought	No drought
Moderate drought (Streamflowlower quartile = 0.03137 cfs)
ESI				54/58 = 93.10	110/120 = 91.67
Drought	54	4	58
No drought	6	56	62
Sum	60	60	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				45/52 = 86.54	100/120 = 83.33
Drought	45	7	52
No drought	13	55	68
Sum	58	62	120
VCI				35/53 = 66.04	85/120 = 70.83
Drought	35	18	53
No drought	17	50	67
Sum	52	68	120