地球物理学进展 ›› 2019, Vol. 34 ›› Issue (4): 1700-1706.doi: 10.6038/pg2019CC0284

• 应用地球物理学Ⅱ(海洋、工程、环境、仪器等) • 上一篇    

海底地下水排泄电阻率法监测技术研究进展(1998—2018年)

张琨焜1,郭秀军1,2,*(),李宁1   

  1. 1. 中国海洋大学环境科学与工程学院,山东青岛 266100
    2. 山东省海洋环境地质工程重点实验室,山东青岛 266100
  • 收稿日期:2018-10-02 修回日期:2019-05-11 出版日期:2019-08-20 发布日期:2019-08-30
  • 通讯作者: 郭秀军 E-mail:guojunqd@ouc.edu.cn
  • 作者简介:张琨焜,女,1994年生,山东青岛人,硕士研究生,主要从事海岸带咸淡水交换电阻率监测技术研究.(E-mail: 18660280557@163.com)
  • 基金资助:
    中央高校基本科研业务费专项(201962005);国家自然科学基金(41772307)

Progress on electrical resistivity method to monitoring submarine groundwater discharge from 1998 to 2018

ZHANG Kun-kun1,GUO Xiu-jun1,2,*(),LI Ning1   

  1. 1. College of Environmental Science and Engineering, Ocean University of China, Shandong Qingdao 266100, China
    2. Key Lab of Marine Environmental Science and Ecology, Ministry of Education, Shandong Qingdao 266100, China
  • Received:2018-10-02 Revised:2019-05-11 Online:2019-08-20 Published:2019-08-30
  • Contact: Xiu-jun GUO E-mail:guojunqd@ouc.edu.cn

摘要:

海底地下水排泄是陆海边界物质交换的重要过程,是陆源物质进入海洋的重要渠道.二十年来,电阻率法已经被证实可有效对该过程进行原位监测.本文归纳分析了十几个典型案例,评价了电阻率探测技术对地下水排泄过程咸淡水时空变化的监测能力和基于监测结果的排泄量计算方法.研究认为常用的海床基电阻率法、走航式电阻率法及井中电阻率法各有优缺点,但海床基电阻率法更适合开展连续监测.监测电阻率剖面可清晰、直观反映出地下水排泄过程沉积物中水体运移、混合及交换界面变化.通过建立监测电阻率变化率与盐度变化关系可进一步计算出海底地下水排泄量,计算结果与同位素示踪法估算结果在同一数量级.

关键词: 海底地下水排泄, 电阻率法, 排泄过程描述, 排泄量计算

Abstract:

Submarine groundwater discharge is an important process of land and sea border exchange of material, and it is an important channel for terrestrial substances to enter the sea. Over the past two decades, resistivity methods have been proven to be effective in monitoring the process in situ. This paper summarizes and analyzes a dozen typical cases to evaluate the ability of resistivity monitoring in spatial and temporal changes of submarine groundwater discharge and the calculation method of discharge flux based on monitoring results. The studies consider that the land-based resistivity method, continuous resistivity method and cross-borehole resistivity method currently applied have advantages and disadvantages, but the land-based resistivity method is more suitable for long-term monitoring. The monitored resistivity profiles show the process of water body migration, mixing and exchange of interface during exchange of brackish water clearly and directly, and responds well to the movement and mixing of water bodies at different time periods. By establishing the relationship between the rate of resistivity change and salinity change, the flux of submarine groundwater discharge can be further calculated. The calculated results are in the same order of magnitude as the isotope tracer method.

Key words: Submarine groundwater discharge, Resistivity method, Discharge process description, Groundwater discharge estimation

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