基于干旱和水位特征构建水库人工增雨需求指数

姜舒婕, 程莹, 方楠, 周毓荃, 单中华, 张磊

Construction of artificial precipitation demand level index of the reservoir based on drought and water level characteristics

JIANG Shujie, CHENG Ying, FANG Nan, ZHOU Yuquan, SHAN Zhonghua, ZHANG Lei

表2 SPI和SSI等级分类

Tab.2 Classification of standardized precipitation index and standardized streamflow index grades

干旱等级 干旱分类 S P I值 S S I值 1 无旱 -0.5<SPI -0.5<SSI 2 轻旱 -1<SPI≤-0.5 -1< SSI≤-0.5 3 中旱 -1.5<SPI≤-1 -1.5< SSI≤-1 4 重旱 -2.0<SPI≤-1.5 -2.0< SSI≤-1.5 5 特旱 SPI≤-2.0 SSI≤-2.0