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为了解青弋江干流径流变化规律,以青弋江流域主要控制站西河镇水文站1970~2010年的径流时间序列为基础资料,采用M-K趋势检验法和小波分析法分析西河镇水文站年际径流变化趋势和变化周期,选用年内分配不均匀系数、完全调节系数、集中度、变率指数等指标分析了径流年内分配特征。结果表明,西河镇水文站年际变化趋势较为平稳,15年周期尺度下的径流丰枯交替较为明显,年内分配各特征指标呈减小趋势,年内径流过程趋于均匀。所得结果可为青弋江流域防洪和水资源合理规划、开发利用提供一定的参考依据。
In order to understand the regularity of runoff variation of Qingyi River, taking the runoff time series from 1970 to 2010 of Xihe Hydrological Station, the main control station of Qingyi River basin as an example, the trend and the wavelet analysis of MK Runoff variation trend and period of change, the distribution characteristics of annual runoff during the year were analyzed using indicators such as non-uniform distribution coefficient, complete regulation coefficient, concentration degree and variability index. The results show that the interannual variation trend of hydrological station in Xihe Town is relatively stable, and the alternation of runoff and abundance is more obvious on the 15-year periodic scale. The distribution of each indicator shows a decreasing trend during the year, and the runoff tends to be uniform during the year. The results can provide some reference for flood control and water resources planning, development and utilization of Qingyi River Basin.