Detection of Embedded Objects Using Parametric Sub-bottom Profilers

摘要

Different applications require the detection and location of objects embedded in the sediments of rivers, lakes or coastal areas. The importance of searching for objects, such as large rocks, in areas of underwater building sites (e.g. offshore wind mills) is increasing. The search for pipelines, the measurement of the thickness of the overburden material and the monitoring of pipeline and cable routes are some of the demands during dredging and are also important for maintaining the safety of water ways. Archaeologists have an interest in the detection of embedded ship wrecks. Surveys are required of historical places to find embedded objects, such as historical buildings or structures. The exact determination of the position and dimension of such objects is necessary for further examinations or removal of the embedded artifacts. During the last two years Innomar Technology GmbH has carried out many surveys in order to search for embedded objects by using the parametric sediment echo sounder SES-96. The use of parametric acoustics offers many advantages in searching for embedded objects. Some technical questions and experiences will be described in the following.