太子河流域本溪段降水径流特征分析

Analysis of precipitation and runoff characteristics in Benxi Section of Taizi River basin

掌握区域降水和径流的演变特征对区域水资源的规划和管理有着十分重要的作用。本文基于实测降水径流资料,采用Mann-Kendal分析、小波分析等方法对太子河流域本溪段降水和径流的趋势和周期特征进行了分析。结果表明,太子河流域本溪段降水、径流的年际分配不均匀,但演变趋势具有一致性,径流变化受降水的影响显著,二者均呈现振荡下降趋势,径流下降趋势显著;降水和径流序列的突变时间基本吻合,有3个明显的突变点,分别为1977年(1978年)、2011年、2016年;降水和径流主要存在3个时间尺度上的变化周期。该研究可为太子河流域本溪段水资源的规划、合理开发利用及防洪减灾提供依据。

Mastering the evolution characteristics of regional precipitation and runoff plays a very important role in the planning and management of regional water resources.Based on the measured data of precipitation and runoff,Mann-Kendal analysis method and wavelet analysis method were used to analyze the trend and periodic characteristics of precipitation and runoff in Benxi section of Taizi River basin.The results show that the interannual distribution of precipitation and runoff in Benxi section of Taizihe River basin is uneven,but the evolution trends are consistent,and the runoff changes are significantly affected by precipitation,both of which show an oscillating downward trend,and the runoff decreases significantly.It is basically consistent with the abrupt change time of precipitation and runoff series,with three obvious abrupt changes,namely,1977(1978),2011 and 2016;and rainfall and runoff mainly have periodic changes in three time scales.This study can provide a basis for the planning,rational development and utilization of water resources and flood control and disaster reduction in Benxi section of Taizi River basin.