Table 3. Precipitation extreme indices... | Emerald Publishing

Table 3.

Precipitation extreme indices

Index	Unit	Description	Definition
CWD	days	Consecutive wet days	The maximum length of wet spell (RR ≥1 mm)
RX5day	mm	Highest precipitation amount in 5 consecutive days	Annual maximum precipitation sums on five-day intervals
CDD	days	Consecutive dry days	Maximum length of dry spell (RR <1 mm)
RR1	Days	Wet days	Number of days per year with rainfall (RR) ≥1 mm
SDII	mm/day	Simple daily intensity index	Annual total precipitation divided by number of wet days (≥1 mm). If W represents the number of wet days in j then the simple precipitation intensity index SDIIj = sum (RRwj)/W
R20mm	days	Very heavy precipitation days	The number of days per year with RR ≥20 mm

Index	Unit	Description	Definition
CWD	days	Consecutive wet days	The maximum length of wet spell (RR ≥1 mm)
RX5day	mm	Highest precipitation amount in 5 consecutive days	Annual maximum precipitation sums on five-day intervals
CDD	days	Consecutive dry days	Maximum length of dry spell (RR <1 mm)
RR1	Days	Wet days	Number of days per year with rainfall (RR) ≥1 mm
SDII	mm/day	Simple daily intensity index	Annual total precipitation divided by number of wet days (≥1 mm). If W represents the number of wet days in j then the simple precipitation intensity index SDIIj = sum (RRwj)/W
R20mm	days	Very heavy precipitation days	The number of days per year with RR ≥20 mm