APPLICATION OF GEOPHYSICAL METHODS TO DETECTING SEA WATER OR SALINE WATER INTRUSION: A CASE STUDY OF ALLUVIAL-PROLUVIAL FAN OF LAIZHOU BAY
-
摘要: 海(咸)水入侵是我国沿海地区的主要地质灾害之一,在一定程度上制约了沿海经济发展和生态文明建设,因此,识别海(咸)水入侵前缘界线对查明灾害发育现状和防治对策的制定具有重要意义。地球物理方法因施工方便、获取数据连续等优点成为海(咸)水入侵界线识别的重要技术手段。阐述了高密度电阻率法和EH-4法2种地球物理探测技术识别海(咸)水入侵界线的原理、依据,并以莱州湾南岸冲洪积扇区为实例进行了探讨。结果表明:这2种方法能够有效的识别海(咸)水入侵界线,并较好地与水质检测结果相吻合;高密度三维探测试验证明地球物理技术可以识别海(咸)水入侵界面的空间分布。Abstract: Sea water and/or saline water intrusion is one of the main geological hazards in coastal areas, which seriously constrains economic development and ecological civilization of the areas to some extent. To find out the front of sea water and/or saline water is of significance to the management of the disaster. Geophysical methods have become an important technical mean to solve this problem attributing to the convenience of operation and continuous behaviour of data acquisition. This article is devoted to the principles of the geophysical methods of high-density resistivity and EH-4, taking the southern alluvial-proluvial fan of the Laizhou Bay as a study case. Results show that both ways are effective to detecting the intrusion fronts, and the results are basically consistent with the hydro-chemical data. Testing experiment proves that the geophysical technique of three-dimensional high-density resistivity could be effectively used to identify the spatial distribution of sea water and/or saline water invasion.
-
Key words:
- geophysics /
- front of sea water and/or saline water /
- Laizhou Bay
-
-
计量
- 文章访问数: 457
- PDF下载数: 47
- 施引文献: 0
下载: