海洋荷载下滨海地区深层地下水波动特征:以南通阳光岛和通州湾为例  

Fluctuation characteristics of deep groundwater in coastal areas under marine loads:A case study of Yangguang Island and Tongzhou Bay in Nantong

作　　者：周盈 鄂建 李洋[1,2] 李月 朱明君 李进 陈添斐[3] Zhou Ying;E Jian;Li Yang;Li Yue;Zhu Mingjun;Li Jin;Chen Tianfei(Key Laboratory of Earth Fissures Geological Disaster,Ministry of Natural Resources,Nanjing 210049,Jiangsu,China;Geological Survey of Jiangsu Province,Nanjing 210018,Jiangsu,China;China Institute of Geological Environment Monitoring,Beijing 100081,China)

机构地区：[1]自然资源部地裂缝地质灾害重点实验室,江苏南京210049 [2]江苏省地质调查研究院,江苏南京210018 [3]中国地质环境监测院,北京100081

出　　处：《地质学刊》2024年第3期293-301,共9页Journal of Geology

基　　金：中国地质调查局与江苏省地质勘查基金联合项目“江苏沿海地区综合地质调查”(1212011220005、苏国土资函〔2014〕842号);中国地质环境监测院项目“国家地下水监测工程运行维护和地下水质监测(江苏省部分)”(0733-22171032/7);江苏省地质勘查基金项目“江苏省地下水地质环境动态监测”(苏财资环〔2021〕46号、苏财资环〔2022〕27号);江苏省自然资源发展专项(JSZRHYKJ202106)。

摘　　要：以往对海洋荷载影响下深层孔隙水波动特性的研究相对较少。基于2018—2020年南通阳光岛和通州湾深层地下水的逐时水位监测数据,运用小波分析法探讨了海洋荷载对深层地下水水位波动的影响。分析发现,从浅海区域的阳光岛到近海岸区域的通州湾,深层地下水水位具有周期波动规律,主周期为19 h,波动周期为12 h与13 h。阳光岛深层地下水水位振幅较大,变化范围为0.23~2.78 m,年最大振幅>2 m;通州湾深层地下水水位振幅较小且稳定,年最大振幅仅为0.34 m。研究结果表明,浅海区域的深层地下水水位振幅较为显著,在从海洋荷载区域向非海洋荷载区域传递过程中,振幅呈现出非线性衰减的趋势。研究结果对理解滨海地区地下水系统动态及其对海洋荷载的响应具有重要的科学意义。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 groundwater 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 transferring 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.

关 键 词：海洋荷载 深层地下水 水位波动周期 地下水水位振幅 阳光岛 通州湾 

分 类 号：P641.2[天文地球—地质矿产勘探]