青弋江干流径流变化规律分析

Characteristics Analysis of Runoff in Main Stream of Qingyijiang River

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。

Based on the runoff time series from 1970 to 2010at the Xihezhen Station on the Qingyijiang Basin,the annual runoff variation and characteristics of intra-annual distribution of the station are analyzed.Inter-annual trend and periodicity of runoff are analyzed by M-K method and the wavelet analysis method.The uniformity coefficient,full regulation coefficient,concentration degree and FI-index are used to analyze the annual runoff distribution characteristics.The results show that the inter-annual trend of Xihezhen station is relatively stable,and the yearly variation alternates wet and dry observably in the 15 years periodic scale;the indexes of annual distribution characteristic appear decreasing trend,and the runoff tend is to be uniform.The results of the research can provide basis for reasonable planning,exploitation,utilization and flood control of Qingyijing River water resources.