Susceptibility, conductivity and porosity along a GEM-SHARK profile@en

The coastal systems, are often subjected to high anthropogenic pressure, which makes it necessary to develop new techniques to assess the environmental impacts caused by such human activity. This paper presents the first results obtained during the development and implementation of a new equipment of submarine geophysics survey oriented to integrated coastal zone management (ICZM). It is based on the drag of a submarine in contact with the sea-bottom. The submarine is equipped with an electromagnetic sensor which allows the measurement of the magnetic susceptibility and electrical conductivity of the surface sediments continuously and to a depth of sediment of 40 cm. This system, once improved, will allow us to obtain valuable information for monitoring the environmental quality of coastal areas.沿海系统常面临高强度人为活动压力，因此亟需开发新技术以评估此类人类活动造成的环境影响。本文介绍了面向海岸带综合管理（Integrated Coastal Zone Management，ICZM）的新型海底地球物理勘测设备的研发与应用过程中取得的首批成果。该设备依托与海底接触的水下拖曳载体运作，该载体搭载电磁传感器，可连续测量表层沉积物的磁化率与电导率，探测深度可达沉积物下40厘米。该系统经优化升级后，将可为沿海区域的环境质量监测提供极具价值的参考信息。