High resolution marine seismic surveying as quality control tool for the construction industry

Multi Channel Marine Seismics is well known for Oil and Gas surveying. The application of this technique at problems of the construction industry or at engineering problems needs some modifications of the seismic equipment and high accuracy in evaluating geometric parameters. The result of these modifications is the hydro-acoustic measurement system. It examines with sound waves in the range from 50 Hz to 25 KHz the underground of shallow water. Targets are reservoirs, rivers and objects in waterfilled construction areas The penetration into the bottom is down to 30m under the sea floor, depending on the seismic impedance between the layers. The use of high frequencies allows measurements of small layers in the range of one decimeter. Inevitable for good results and high resolution ist the digital seismic postprocessing of the multichannel dataset.