A New Approach for Routine Investigation of the Shallow Sea Floor with Bottom-towed DC Resistivity Measurements

We present a new approach for routinely investigating the shallow sea-floor. Hardware is a dedicated multi-electrode cable that is towed above the bottom and additional sensors for determining geometry. Data processing is achieved by a harmonic least squares fit representing a spatial stacking of the data. The resistivity distribution is obtained by a fast and on-situ 1d inversion, a roll-along 2d inversion and a detailed analysis using finite elements.