From: Climate variability and trends in the Endorheic Lake Hayk basin: implications for Lake Hayk water level changes in the lake basin, Ethiopia
Index
Category
Frequency of occurrence
(number of years)
< 10
Low concentration (uniform distribution of rainfall)
0
11–20
High concentration
22
≥ 21
Very high concentration
8
Mean PCI (1986–2015) = 18.30 (high concentration of rainfall)