基于标准化流量指数(SDI)的石羊河流域水文干旱特征

李玲萍, 卢泰山, 刘明春, 胡丽莉, 王素萍

Characteristics of hydrological drought based on standardized flow index in Shiyang River Basin of China

Lingping Li, Taishan Lu, Mingchun Liu, Lili Hu, Suping Wang

表3 标准化流量指数（SDI）干旱分级

Table 3 Hydrologic drought degree based on SDI

等级 类型 SDI 0 无旱 SDI≥1.21 1 轻旱 0.7≤SDI<1.21 2 中旱 -0.59≤SDI<0.7 3 重旱 -1.37≤SDI<-0.59 4 特旱 SDI<-1.37