近60年河北省冬小麦干旱风险时空规律
张力,陈阜,雷永登

Spatial and temporal patterns of drought risk for winter wheat grown in Hebei province in past 60 years
Li ZHANG,Fu CHEN,Yong-Deng LEI
图4 冬小麦不同生育阶段重旱及特旱频率的空间分布
Fig. 4 Spatial patterns of heavy drought and severe drought in different growth stages of winter wheat