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.
流域水文预报模型的参数率定是洪水预报中非常重要和困难的工作。
The parameter identifying of the hydrology forecasts model is very important and difficult work in the flood forecasting.
对水文测站的洪水与枯水巡视进行了可行性分析。
The paper analyzes ground survey of flood and low water in hydrological survey station.
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