流溪河太平场镇站40年水位变化规律分析

Analysis on the Change Law of Stage in Taipingchang Hydrometric Station in Liuxi River in Recent 40 Years

为了解太平场镇站水文特征,基于该站1975-2014年40年水位资料,采用趋势分析法及M-K法,对其水位演变趋势进行分析。结果表明:(1)太平场镇站年特征水位整体均呈降低趋势,年水位变幅整体呈增加趋势;(2)年平均水位呈降低——升高——降低趋势;(3)年最高水位在1990年前呈升高趋势,后呈降低趋势,且1996年后降低趋势显著,1994年是突变点;(4)年最低水位自1975年至今一直呈降低趋势,自1988年起降低趋势显著。

In order to explore the hydrological characteristics of Taipingchang Hydrological Station,based on the measured stage data of the Taipingchang Hydrological Station for 40 years from 1975 to 2014,a trend analysis and M-K method are used to analyze the evolution trend of the stage.The results show that:(1)the annual average stage,the annual maximum stage,and the annual minimum stage of Taipingchangzhen Hydrological Station are generally decreasing,and the annual stage change is generally increasing;(2)the annual average stage can be divided into three periods,decreasing period,increasing period,and decreasing period;(3)The annual maximum stage showed an upward trend before 1990,and then a downward trend,and a significant downward trend after 1996.1994 was the mutation point;(4)The annual minimum stage has been decreasing since 1975,and it has been decreasing significantly since 1988.