基于气象旱涝指数的旱涝急转事件识别方法

杨家伟,陈华,侯雨坤,赵英,陈启会,许崇育,陈杰

A method to identify the drought-flood transition based on the meteorological drought index

YANG Jiawei,CHEN Hua,HOU Yukun,ZHAO Ying,CHEN Qihui,XU Chongyu,CHEN Jie

表2 基于SWAP指数的旱涝强度等级

Tab. 2 SWAP categories based on the initial classification of SAWP values

旱涝等级 SWAP 概率(%) 特涝 2.0 ≤ SWAP 2.3 重涝 1.5 ≤ SWAP < 2.0 4.4 中涝 1.0 ≤ SWAP < 1.5 9.2 轻涝 0.5 ≤ SWAP < 1.0 15 正常 -0.5 < SWAP < 0.5 38.2 轻旱 -1.0 < SWAP ≤ -0.5 15 中旱 -1.5 < SWAP ≤ -1.0 9.2 重旱 -2.0 < SWAP ≤ -1.5 4.4 特旱 SWAP≤-2.0 2.3