Spatiotemporal Changes in Extreme Precipitation and Its Dependence on Topography over the Poyang Lake Basin, China

Table 2

Definitions of 8 precipitation extreme indices used in this study.

Categories	Indices	Description	Units
Threshold indices	The annual extreme precipitation days (EPDs)	Annual count of days when daily precipitation ≥ the threshold of extreme precipitation	days
	The annual extreme precipitation amount (EPA)	Annual total precipitation amount when daily precipitation ≥ the threshold of extreme precipitation	mm
	The annual average extreme precipitation intensity (EPI)	EPA divided by EPD	mm/day
	The extreme precipitation rate of contribution (EPR)	Contribution of extreme precipitation to the annual total rainfall	%
Duration indices	The consecutive dry days (CDDs)	Maximum number of consecutive days with daily precipitation < 1 mm	days
	The consecutive wet days (CWDs)	Maximum number of consecutive days with daily precipitation ≥ 1 mm	days
Absolute indices	The maximum one-day precipitation amount (Rx1d)	Annual maximum 1-day precipitation	mm
	The maximum five-day precipitation amount (Rx5d)	Annual maximum consecutive 5-day precipitation	mm