Hydrologic sequence is a complicated time sequence, which has characteristics such as periodic changes, random changes and increasing or decreasing trend changes.
水文水资源序列是一个具有周期变化、随机变化和递增或递减趋势变化的复杂时间序列。
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The results show that effect of urbanization on hydrological sequence of the main rivers around Xi'an is of the decreasing order among Bahe River, Heihe River and Fenghe River;