In this study, four extreme precipitation indices are selected as evaluation indicators, including heavy rain days (R50), heavy precipitation (R95p), 5-day maximum precipitation (RX5day) and annual precipitation (PRCPTOT), and the specific information of each index is shown in Table 2. The R50, R95p and Rx5day can reflect the extreme characteristics of precipitation and the PRCPTOT represents the spatial distribution characteristics of precipitation.
Details of the extreme precipitation indices selected in this study
| Index . | Abbreviation . | Definition . | Unit . |
|---|---|---|---|
| Heavy rain days | R50 | The number of days when the daily precipitation is not less than 50 mm | days |
| Heavy precipitation | R95p | The total amount of daily precipitation greater than the 95th percentile threshold | mm |
| 5-day maximum precipitation | RX5day | Maximum consecutive 5-day precipitation | mm |
| Annual precipitation | PRCPTOT | Total annual precipitation | mm |
| Index . | Abbreviation . | Definition . | Unit . |
|---|---|---|---|
| Heavy rain days | R50 | The number of days when the daily precipitation is not less than 50 mm | days |
| Heavy precipitation | R95p | The total amount of daily precipitation greater than the 95th percentile threshold | mm |
| 5-day maximum precipitation | RX5day | Maximum consecutive 5-day precipitation | mm |
| Annual precipitation | PRCPTOT | Total annual precipitation | mm |