SDII Value

Significance

(Intensity)

PCI Value

Significance

(Temporal Distribution)

To 15 inclusive

Low intensity

To 10 inclusive

Uniform distribution

Over 15 to 20

Moderate intensity

Over 10 to 15

Moderate distribution

Over 20 to 25

High intensity

Over 15 to 20

Irregular distribution

Over 25 to 30

Strong Intensity

Over 20

Strongly irregular distribution

Over 30

Very strong intensity