海南岛干旱特征遥感识别及时空变化研究

马毓窕,穆晓东,侯鹏,孙林,张邻晶

Remote Sensing Identification and Spatial Variation of Drought Characteristics in Hainan Island

Yutiao Ma,Xiaodong Mu,Peng Hou,Lin Sun,Linjing Zhang

表1 干旱等级划分标准

Table 1 Criteria for classification of drought grades

等级 RSM/% VSWI 干旱等级 1 60<RSM VSWI>0.025 正常 2 50<RSM≤60 0.022<VSWI≤0.025 轻旱 3 40<RSM≤50 0.019<VSWI≤0.022 中旱 4 30<RSM≤40 0.017<VSWI≤0.019 重旱 5 RSM≤30 0<VSWI≤0.017 特旱