海底承压含水层排泄电阻率法探测效果模拟与分析

李宁; 郭秀军; 马强伟; 张宇丰

doi:10.3969/j.issn.0253-4193.2019.05.012

海底承压含水层排泄电阻率法探测效果模拟与分析

doi: 10.3969/j.issn.0253-4193.2019.05.012

1.
中国海洋大学环境科学与工程学院, 山东青岛 266100
2.
中国海洋大学环境科学与工程学院, 山东青岛 266100;山东省海洋环境地质工程重点实验室, 山东青岛 266100

基金项目: 国家自然科学基金（41772307）；国家重点研发项目（2017YFC0307701）；国家自然科学基金重大科研仪器研制项目（41427803）。

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出版历程
- 收稿日期: 2018-06-26

The research of electrical resistivity system's application effect simulation in coastal submarine confined groundwater discharge

1.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China
2.
College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China

摘要

摘要: 海底承压含水层排泄是海底地下水排泄的一种主要形式。由于这一过程发生在海水层下部，探测难度较大。为探讨海洋多电极电阻率法对该过程的探测能力，根据典型海底承压含水层地质模型构建不同排泄阶段地电模型，模拟海面和海床面两种探测情形分别进行多电极电阻率法理论探测结果计算和物理模拟，并对所得电阻率剖面进行对比分析。研究结果表明，水面多电极电阻率探测剖面能够清晰刻画出排泄入海的淡水体在海水中迁移、混合过程，但剖面异常特征和分辨率受探测装置形式、电极极距、海水深度影响；海床面探测则对沉积层中咸淡水交换过程反映能力更强，沉积层中的锲形海水侵入体可得到良好反映。
- 海底地下水排泄 /
- 承压含水层 /
- 电阻率法 /
- 探测效果
Abstract: Confined groundwater discharge is a major form of submarine groundwater discharge. Because this process occurs in the bottom of seawater, detection is more difficult. To explore the detection capabilities of the marine multi-electrode resistivity method for this process, according to the typical geological model of the confined aquifer in the seabed, the geoelectric models with different drainage stages were constructed. Simulate sea surface and sea floor detection conditions, and compare the resulting resistivity profiles. The results of the study indicate that the water surface multi-electrode resistivity detection profile can clearly depict the migration and mixing process of freshwater excreted into the sea in seawater. However, the anomalous profile and resolution of the profile are affected by the detection device, electrode pole pitch, and seawater depth. Seabed surface detection results are more capable of reflecting the exchange process of brackish water in sediments, and the seawater intrusions in sediments can be well reflected.
- submarine groundwater discharge /
- confined groundwater /
- resistivity method /
- detection effect

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参考文献(20)

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