The sequence of some hydrological factors has been analyzed in detail since the mid century.

本文较为详细地分析了近半个世纪以来的伊塞克湖区实测水文和气象资料。

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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.

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。

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Because of traditional methods 'limitation, it is difficult to take the spatial variability of hydrological factors into consideration for watershed simulation.

传统的流域模拟由于方法本身的局限性，很难考虑和处理水文要素在空间分布上的差异性。

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Furthermore, water availability must be understood within the context of the hydrological cycle, which is influenced by multiple factors, trends, uncertainties and the associated risks that extend beyond a narrow sectoral focus.

UNESCO: World Water Assessment Programme (WWAP)