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| DOI：10.13522/j.cnki.ggps.20190093 |
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| Responsive Change in Groundwater Table in Karst to Precipitation and Yellow River in Pingyin County |
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QI Huan
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1. 801 Institute of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resources, Jinan 250014, China; 2. Key Laboratory of Groundwater Resources and Environment, Shandong Provincial Bureau of Geology & Mineral Resources, Jinan 250014, China; 3. Shandong Province Groundwater Environmental Protection and Rehabilitation Engineering Technology Research Center, Jinan 250014, China
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| Abstract: |
| 【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 0.86~1.20a and 0.86~1.36a respectively, while the oscillation period of the Yellow River water was 1a and 3a. 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. |
| Key words: groundwater level; water level of Yellow River; precipitation; cross-correlation; wavelet analysis |
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