摘要
电学方法在海洋地球物理测量中应用广泛,电性特性对海水悬浮颗粒物浓度变化敏感,本文提出了一种基于电阻率、自然电位及氧化还原电位测量海水悬浮颗粒物浓度变化新方法.选取来自不同地区的两种沉积物,通过室内试验测量浓度为0~20 g·L^(-1)海水悬浮颗粒物的电阻率、自然电位和氧化还原电位响应,探究电阻率、自然电位和氧化还原电位随海水悬浮颗粒物浓度变化关系,建立了基于电学特性变化测量悬浮颗粒物浓度的经验公式,并对该测量方法的适用工况、精度及分辨率进行分析.结果表明:基于电阻率、自然电位及氧化还原电位测量海水悬浮颗粒物浓度变化新方法可用于监测海水悬浮颗粒物浓度变化,该电学方法在测量海水悬浮颗粒物浓度变化时更灵敏,其分辨率为1 g·L^(-1),测量范围大,粒度依赖性较弱,测量精度最高可达82%.研究结果可为海水悬浮颗粒物浓度测量等研究提供新的思路与技术支撑.
The electrical method is widely used in Marine geophysical survey,and the electrical characteristics are sensitive to the change of the concentration of suspended particulate matter in seawater.A new method is proposed to measure the concentration changes of suspended particulate matter in seawater based on resistivity,self-potential and redox potential.In this paper,two kinds of sediments from different regions were chosen for laboratory experiments to investigate the responses of resistivity,self-potential and redox potential to the concentration of suspended particulate matter in seawater ranging from 0 g·L^(-1) to 20 g·L^(-1).The relationship between the electrical properties and the concentration of suspended particulate matter was explored.An empirical formula based on the measurement of electrical characteristic changes was established to determine the concentration of suspended particulate matter.The working conditions,accuracy and resolution of the measurement method were analysed.The results show that the new method based on resistivity,self-potential and redox potential can be used to monitor the changes in the concentration of suspended particulate matter in seawater.The electrical method is more sensitive to the changes in the concentration of suspended particulate matter in seawater with a resolution of 1 g·L^(-1),a large measuring range,aweak size dependence.The measurement accuracy can reach up to 82%.The results of the study can provide new ideas and technical support for studies on the measurement of suspended particulate matter concentration in seawater.
作者
李雪洋
范智涵
贾永刚
单红仙
朱宪明
鲁德泉
毛韩敏
潘雪
LI XueYang;FAN ZhiHan;JIA YongGang;SHAN HongXian;ZHU XianMing;LU DeQuan;MAO HanMin;PAN Xue(Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering,Ocean University of China,Qingdao 266100,China;Laboratory for Marine Geology,Qingdao Marine Science and Technology Center,Qingdao 266237,China;College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China)
出处
《地球物理学进展》
北大核心
2025年第3期1305-1316,共12页
Progress in Geophysics
基金
国家重点研发计划项目(2021YFB2601100)
崂山实验室科技创新项目(LSKJ202203601)联合资助。
关键词
泥沙淤积
悬浮颗粒物
电阻率
自然电位
氧化还原电位
Silt deposition
Suspended particle matter
Resistivity
Self-potential
Redox potential
