Review on Underwater MASW with Respect to Source and Wave Characteristics

Underwater Multichannel Analysis of Surface Waves (U-MASW) is an extension of conventional MASW technique that is used on land surface. The method has received many applications in subsurface investigations of water-bottom sediments, which is essential in design of off-shore structures, laying of underwater cables, etc. However, the source type and setup for data acquisition in this method is largely different from the conventional techniques. One of the important available studies on source mechanism presents the energy variation with respect to frequency and depth. Water-solid interface gives rise to different kinds of wave generation. The paper deals with how these waves differ from one another and where they originate. Additionally, propagation and pressure variation of Scholte waves with respect to time and frequency is presented. In short, here the source characteristics and Scholte wave characteristics are shown and some points are suggested where more investigations are needed.