松花江区气象水文干旱演变特征
吴燕锋, 章光新

Spatio-temporal Patterns of Meteorological and Hydrological Drought in the Songhua River Area from 1961 to 2010
Yanfeng Wu, Guangxin Zhang
图6 松花江区水文干旱频次(a)、平均持续时间 (b)和平均强度(c)
Fig.6 Drought frequency (a), average intensities (b) and durations (c) of hydrological drought in the Songhua River Area