近30年涡河玄武水文站地表水与地下水转换关系及趋势分析

Transformation Relationship and Trend Analysis of Surface Water and Groundwater at Guohe Xuanwu Hydrological Station in the Past Thirty Years

依据涡河玄武水文站近30年地表水与地下水水位数据,本文研究了地表水与地下水的相互转化关系,通过Mann-Kendall趋势检验法和小波分析法,揭示了地表水与地下水关系的变化趋势。结果表明:涡河地表水与地下水在1988-2018年间存在明显的交替补给关系;涡河玄武水文站地表水水位呈明显(置信水平95%)的下降趋势,地下水水位变化呈上升—下降—上升—下降的趋势;由小波分析可知玄武水文站地表水与地下水均存在27a的演变周期,地表水与地下水水位变化的密切关系。

According to the nearly 30 years of surface water and groundwater level data from the Guohe Xuanwu Hydrological Station,this paper studies the transformation relationship between surface water and groundwater,which is revealed through Mann-Kendall trend test and wavelet analysis.The results show that there is an obvious alternate recharge relationship between the surface water and groundwater of the Guohe River from 1988 to 2018;the surface water level of the Guohe Xuanwu Hydrological Station has decreased significantly(confidence level 95%),and the groundwater level changes exhibits a rising-falling-rising-falling trend;Wavelet analysis shows that both the surface water and groundwater have a 27a evolution cycle,and there is a close relationship between surface water and groundwater level changes.