近50 a桃河上游降水及径流演变特性

Evolution Characteristics of Precipitation and Runoff in the Upper Reaches of Taohe River in Recent 50 Years

为了更好的掌握桃河上游的降水和径流的变化情况,根据旧街水文站1970-2020年实测降水和径流资料,对桃河上游降水和径流的年内分配、年际变化、变化趋势及相关关系等进行了分析,结果表明:桃河上游降水和径流都有年内分配不均,年际变化大的特点,降水变化趋势不明显,径流有明显下降趋势。径流很可能受到了人类活动干扰等除降水之外的因素的影响。

In order to better grasp the changes of precipitation and runoff in the upper reaches of Tao River,the annual distribution,interannual variation,trend and correlation of precipitation and runoff in the upper reaches of Tao River were analyzed according to the measured precipitation and runoff data of Jiujie Hydrological Station from 1970 to 2020.The results show that:The precipitation and runoff in the upper reaches of Tao River have the characteristics of uneven annual distribution and large inter-annual variation.The variation trend of precipitation is not obvious,but the runoff has an obvious downward trend.Runoff is likely to be influenced by factors other than precipitation,such as human interference,but precipitation is still the main influencing factor.