平阴岩溶地下水位与降水量、黄河水位的相关性分析

【目的】查明平阴岩溶地下水位对降水量、黄河水位响应的时滞差异。【方法】选取2007—2018年2个沿黄岩溶水位监测数据、同期降水量和黄河水位资料,采用互相关分析、连续小波变换和交叉小波变换对岩溶水位与降水量、黄河水位的相关性进行了分析。【结果】①降水量、岩溶水位的互相关系数具有明显的12个月的周期,黄河水位周期性不强。岩溶水位与降水量、黄河水位之间存在1～8个月和0～10个月的时间滞后。②降水量和岩溶水位存在0.86～1.20 a和0.86～1.36 a的连续主震荡周期,黄河水位存在1 a和3 a的周期变化特征。③岩溶水位对降水量、黄河水位的滞后时间为110.46～164.39 d和105.77～161.88 d,黄河水与岩溶地下水之间径流速度为21.62～25.53 m/d。【结论】平阴岩溶水位对黄河水位的时滞略小于对降水量的时滞。

Responsive Change in Groundwater Table in Karst to Precipitation and Yellow River in Pingyin County

【Objective】This paper aims to unravel the relationship between groundwater table fluctuation in karst and the precipitation and water level of the Yellow River at Pingyin in Shandong province.【Method】The analysis was based on data measured from groundwater in two karsts in the proximity of the Yellow River, precipitation and change in water level in the river from 2007 to 2018. The response of groundwater table fluctuation to precipitation and water level in the Yellow River was calculated using cross-correlation analysis, continuous wavelet transform and cross-wavelet transform.【Result】Both precipitation and groundwater table fluctuation had a 12-month period. The responsive change in groundwater table lagged behind the precipitation by 1～8 months, and the water level in the Yellow River by 0～10 months. The precipitation and groundwater table oscillated with a period of 0.86～1.20 a and 0.86～1.36 a respectively, while the oscillation period of the Yellow River water was 1 a and 3 a. The average velocity at which water flowed from the Yellow River to the karst was 21.62～25.53 m/d.【Conclusion】The responsive change in groundwater table in the karst in Pingyin to water level in the Yellow River was slightly slower than to precipitation.