critical hydrologic drought duration 极限水文干旱历时
The probability distribution of hydrologic drought variables and its affected factors were analyzed.
研究了水文干旱变量概率分布特性,指出了其影响要素和随之变化规律。
参考来源 - 渭河流域主要河流水文干旱特性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Human activities, including the utilization of water resources, the water and soil conservation, and land use, all contribute to the hydrologic drought of northwest China.
水资源的开发利用、水土保持以及土地利用等人类活动使得西北地区水文干旱进一步加剧。
Natural disasters are catastrophic events with atmospheric, geologic, and hydrologic origins. Disasters include earthquakes, volcanic eruptions, landslides, tsunamis, floods, and drought.
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.
自然灾害源于大气、地理或者水文的灾变，包括地震、火山爆发、泥石流、海啸、洪水和干旱等。
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