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Table 1 Precipitation indices used in the study

From: Hydrological impacts of precipitation extremes in the Huaihe River Basin, China

Index

Explanation

Definition

Unit

CDD

Consecutive dry days

Maximum number of consecutive days with daily precipitation <1 mm

day

CWD

Consecutive wet days

Maximum number of consecutive days with daily precipitation ≥1 mm

day

PRCPprb

Precipitation probability

Probability of wet days (with precipitation ≥1 mm)

%

PRCPtot

Annual total wet-day precipitation

Annual or monthly total precipitation in wet days (precipitation ≥1 mm)

mm

R95p

Heavy precipitation totals

Annual total precipitation when precipitation >95th percentile

mm

RX1 day

Max 1-day precipitation amount

Annual or monthly maximum 1-day precipitation amount

mm

RX5 day

Max 5-day precipitation amount

Annual or monthly maximum precipitation amount in 5 consecutive days

mm

SDII

Simple precipitation intensity indicator

Total annual precipitation divided by the total number of wet days (with precipitation ≥1 mm)

mm/day

MinFLow

Minimum streamflow

Annual or monthly minimum streamflow

m3/s

FLow

Mean streamflow

Annual or monthly mean streamflow

m3/s

FX1 day

Maximum 1-day streamflow

Annual or monthly maximum 1-day streamflow

m3/s

FX5 day

Maximum 5-day mean streamflow

Annual or monthly maximum streamflow in 5 consecutive days

m3/s