中文摘要：

为实现水下浅层介质二维电阻率映像法探测，一种走航式水下多道电阻率探叫系统（NURSS）被研制开发。该系统由主控系统、定位系统、多道电缆及拖体组成。多道电缆长100m，装配有10个不极化电位测量极（可扩展）和4个供电极，可实现二极和偶极装置测量，电位采集采用并行采集技术。以水库库底渗漏探叫为目标的数值分析和应用实例表明该系统比啦面电阻率法具有更高的分辨率，可精确探测库底渗漏通道位置与延展深度，是实现水下浅层目标探测的有效工具。

英文摘要：

We have developed a navigated underwater DC resistivity survey system （NURSS）. It was designed to effectively detect the object in the underwater soil. This instrument system mainly consists of the core control system, navigation system, multichannel cable and towed body. The multiehannel cable includes four electrical current electrodes and ten non-polarizing potential electrodes, and the length of it is about 100 meters, could accomplish continuous two-dimensional detection with dipole-dipole or pole-pole array. Numerical analysis and the application examples show that the NURSS owns higher resolution compared with the surface resistivity method. It can accurately detect the location and extending depth of leakage passage in the underwater soil layers. NURSS is an usefully instrument used in the shallow water detection that the depth of water less than 20 m and the acoustic method inappropriately carried out.