Fluctuation characteristics of deep groundwater in coastal areas under marine loads:A case study of Yangguang Island and Tongzhou Bay in Nantong
Previous studies on the fluctuation characteristics of deep aquifer water induced by marine loads are relatively limited.Based on hourly groundwater level monitoring data from 2018 to 2020 in Yangguang Island and Tongzhou Bay of Nantong,the influence of marine loads on deep groundwater level fluctuations was investigated using wavelet analysis.The analysis reveals that deep groundwa-ter levels exhibit periodic fluctuations from Yangguang Island in the shallow sea area to Tongzhou Bay in the near-coastal area,with a dominant period of 19 hours and secondary periods of 12 hours and 13 hours.The amplitude of deep groundwater level fluctuations in Yangguang Island is significant,ranging from 0.23 to 2.78 meters,with annual maximum amplitudes exceeding 2 meters,whereas in Tongzhou Bay,the amplitude is smaller and stable,with an annual maximum of only 0.34 meters.The study results indicate that the amplitude of deep groundwater levels is notably pronounced in shallow sea areas and exhibits a non-linear attenuation trend when trans-ferring from marine load regions to non-marine load regions.These findings are of significant scientific importance for understanding the dynamics of coastal groundwater systems and their response to marine loads.
marine loaddeep groundwaterwater level fluctuation periodgroundwater level amplitudeYangguang IslandTong-zhou Bay
万方数据
维普
