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基于澧水中上游三个控制水文站多年实测径流资料,从年内分配和年际变化两方面分析了澧水中上游径流变化特征。结果表明:澧水中上游径流年内分配较集中,各年代径流年内分配不均性变化平稳;年径流总体呈下降趋势,其中4、11、12月径流下降趋势明显,而2月径流呈明显上升趋势;年径流存在多个时间尺度的周期性变化,其中以4、72、0 a尺度的周期性变化为主。
Based on the multi-year measured runoff data of three controlled hydrological stations in the middle and upper reaches of the Huangshui River, the characteristics of runoff variation in the upper and middle reaches of the Huangshui River were analyzed from two aspects: distribution within the year and interannual variation. The results showed that the distribution of runoff in the middle and upper reaches of Huangshui River was more concentrated during the year, and the distributional variation of runoff in each year was stable. The annual runoff generally showed a decreasing trend, of which the runoff decreased obviously in April, November and December and the runoff in February showed a clear upward trend The annual runoff has periodic changes over time scales of 4,72,0 a scale.