基于随机森林的遥感干旱监测模型的构建

沈润平, 郭佳, 张婧娴, 李洛晞

Construction of a Drought Monitoring Model Using the Random Forest Based Remote Sensing

SHEN Runping,GUO Jia,ZHANG Jingxian,LI Luoxi

表1 综合气象干旱指数(CI)及标准化蒸散发指数

Tab. 1 Classification scales of drought withrespect to CI and SPEI

等级 类型 综合气象干旱指数值 标准化蒸散发指数值 1 无旱 -0.6<CI -0.5<SPEI 2 轻旱 -1.2<CI≤-0.6 -1<SPEI≤-0.5 3 中旱 -1.8<CI≤-1.2 -1.5<SPEI≤-1 4 重旱 -2.4<CI≤-1.8 -2<SPEI≤-1.5 5 特旱 CI≤-2.4 SPEI≤-2