Application of audio magnetotelluric sounding to the seawater intrusion survey of Jinzhou
-
摘要:
锦州大、小凌河区域内的海水、咸水入侵严重影响了当地的经济和人民生活质量，为查明研究区海水、咸水入侵的界线变化及污染范围，在研究区完成了5条音频大地电磁测深（AMT）剖面。剖面数据采用改进非线性共轭梯度（NLCG）法反演，二维反演结果直观反映了研究区咸淡水分布范围，给出了咸淡水的分界线位置。结果表明，L0和L1剖面处的海侵范围未扩大；L2剖面处海侵范围在扩大；L3剖面处地下古咸水已污染部分淡水；L4剖面处存在古咸水但未污染淡水；这与水文地质钻孔及机民井调查资料基本吻合。总之，在锦州地区使用AMT方法研究海水、咸水的赋存状态及变化规律可行、有效，可以为锦州环境水文地质调查提供基础的地球物理资料。
Abstract:The invasion of sea and salt water in big and small Linghe region of Jinzhou City has seriously affected the local economy and people's quality of life. In order to find out the boundary change and pollution scope of the sea and salt water in the study area, five AMT profiles have been completed. The profile data is inversed by the improved NLCG method. The two-dimensional inversion results directly reflect the distribution range of the salt and fresh water in the study area, and give the boundary location of the salt and fresh water. The results show that the transgressive range of L0 and L1 profile does not expand, the transgressive range of L2 profile is expanding, part of fresh water has been polluted by the underground ancient saline water at L3 profile, and the fresh water is not polluted at L4 profile, which are basically consistent with the hydrogeological drilling and mechanical well survey data. In a word, AMT method is feasible and effective to study the occurrence state and change rule of sea and salt water in the Jinzhou area, which can provide basic geophycical data for environmental hydrogeology investigation.
-
Keywords:
- Jinzhou /
- invasion of sea and salt water /
- AMT /
- inversion /
- salt and fresh water interface
-
-
![]()
图 2 AMT测量部分测点视电阻率和相位曲线图
ρs—视电阻率；f—频率；φ—相位
Figure 2. Apparent resistivity and impedance phase curves of some points for AMT measurements
![]()
图 3 AMT测量部分检查点视电阻率和相位曲线图
ρs—视电阻率；f—频率；φ—相位
Figure 3. Apparent resistivity and impedance phase curves of some check points for AMT measurements
![]()
图 4 L0剖面视电阻率反演图(a)和推断解译图(b)
Figure 4. Apparent resistivity inversion (a) and inferred interpretation (b) of section L0
![]()
图 5 L1剖面视电阻率反演图(a)和推断解译图(b)
Figure 5. Apparent resistivity inversion (a) and inferred interpretation (b) of section L1
![]()
图 6 L2剖面视电阻率反演图(a)和推断解译图(b)
Figure 6. Apparent resistivity inversion (a) and inferred interpretation (b) of section L2
![]()
图 7 L3剖面视电阻率反演图(a)和推断解译图(b)
Figure 7. Apparent resistivity inversion (a) and inferred interpretation (b) of section L3
-
Swartz J H. Resistivity-studies of some salt-water boundaries in the Hawaiian Islands[J]. Transactions American Geophysical Union, 1937, 18(2): 387-393. doi: 10.1029/TR018i002p00387
刘青勇, 董广清. 电阻率法在防治莱州湾地区海水入侵中的应用[J]. 物探与化探, 1999, 23(5): 368-372. doi: 10.3969/j.issn.1000-8918.1999.05.010 唐心强, 康桂红, 大年邦雄, 等. Wenner法探测淡盐界面的调查研究[J]. 地下水, 2006, 28(3): 83-88. doi: 10.3969/j.issn.1004-1184.2006.03.027 Adepelumi A, Ako B D, Ajayi T R, et al. Delineation of saltwater intrusion into the freshwater aquifer of Lekki Peninsula, Lagos, Nigeria[J]. Environmental Geology, 2009, 56(5): 927-933. doi: 10.1007/s00254-008-1194-3
Hodlur G K, Dhakate R, Sirisha T, et al. Resolution of freshwater and saline water aquifers by composite geophysical data analysis methods[J]. Hydrological Sciences Journal, 2010, 55(3): 414-434. doi: 10.1080/02626661003738217
杨学明, 苏永军, 杜东, 等. 音频大地电磁法在海水入侵动态监测中的应用[J]. 物探与化探, 2013, 37(2): 301-305. https://www.cnki.com.cn/Article/CJFDTOTAL-WTYH201302025.htm 苏永军, 黄忠峰, 匡海阳, 等. EH4电磁成像系统在莱州湾地区探测海水入侵界限的调查研究[J]. 地质调查与研究, 2014, 37(4): 264-268. doi: 10.3969/j.issn.1672-4135.2014.04.004 苏永军, 范剑, 刘宏伟, 等. 高密度电阻率法探测海水入侵咸淡水界限初步调查研究——以莱州湾为例[J]. 地质调查与研究, 2014, 37(3): 177-181. https://www.cnki.com.cn/Article/CJFDTOTAL-QHWJ201403003.htm El-Kaliouby H, Abdalla O. Application of time-domain electromagnetic method in mapping saltwater intrusion of a coastal alluvial aquifer, North Oman[J]. Journal of Applied Geophysics, 2015, 115: 59-64. doi: 10.1016/j.jappgeo.2015.02.003
何玉海. 高密度电法在莱州湾海水入侵调查中的研究与应用[J]. 海洋环境科学, 2016, 35(2): 301-305. https://www.cnki.com.cn/Article/CJFDTOTAL-HYHJ201602025.htm Kazakis N, Pavlou A, Vargemezis G, et al. Seawater intrusion mapping using electrical resistivity tomography and hydrochemical data. An application in the coastal area of eastern Thermaikos Gulf, Greece[J]. Science of the Total Environment, 2016, 543: 373-387. doi: 10.1016/j.scitotenv.2015.11.041
刘宏伟, 黄忠峰, 郭旭, 等. 地球物理技术在识别海(咸) 水入侵界线中的应用[J]. 海洋地质前沿, 2016, 32(9): 58-63. https://www.cnki.com.cn/Article/CJFDTOTAL-HYDT201609009.htm 陈松, 刘磊, 刘怀庆, 等. 北部湾咸淡水分界面划分中的电法应用分析[J]. 地球物理学进展, 2019, 34(4): 1592-1599. https://www.cnki.com.cn/Article/CJFDTOTAL-DQWJ201904039.htm Prashant K, Prarabdh T, Anand S, et al. Electrical resistivity and induced polarization signatures to delineate the near-surface aquifers contaminated with seawater invasion in Digha, West-Bengal, India[J]. Catena, 2021, 207: 1-17.
余海忠, 冯书才, 曾奇. 采用物探方法研究深圳西部海水入侵现状[J]. 山西建筑, 2015, 41(14): 56-58. https://www.cnki.com.cn/Article/CJFDTOTAL-JZSX201514032.htm 余年, 庞方. 音频大地电磁测深法在地热勘查中的应用研究[J]. 水文地质工程地质, 2010, 37(3): 135-138. https://www.cnki.com.cn/Article/CJFDTOTAL-SWDG201003034.htm 辽宁工程勘察院.辽宁省锦州市市区及凌海市地质灾害调查与区划报告. 2005.
下载:
计量
- 文章访问数: 2284
- HTML全文浏览量: 436
- PDF下载量: 1539
