盐湖和其他干旱水文因素是全球范围内最普通的沙尘暴源。
Salt pans and other dry water features are among the most common sources of dust in the world.
分析了长江下游感潮河段大洪水和特大洪水高水位形成的水文因素，揭示了年最高水位今后一段时期内可能的变化趋势。
Hydrological factors of formation of large flood in the lower tidal reach of the Yangtze River are analyzed, and change trend of large flood is revealed.
自然灾害是指大气、地质或水文等因素造成的灾变，包括地震、火山爆发、泥石流、海啸、洪水和干旱等。
Natural disasters are catastrophic events with atmospheric, geologic, and hydrologic origins. Disasters include earthquakes, volcanic eruptions, landslides, tsunamis, floods, and drought.
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