ABSTRACT
Transformations of underwater surface such as landslide may be sources of many potential hazards. This chapter presents the design and implementation of a high resolution geophysical technique, ultrasonic wave reflection imaging, to identify the submerged mass movement of the layered particle specimen at 1 g. Occurrences of underwater landslide may cause severe damages to infra facilitates. Monitoring process of underwater landslide provides the slope geomorphology, one of the most important pieces of knowledge. The underwater landslide monitoring was conducted by using an experiment tank at 1 g. Glass bead and silica flour were used in this research. Signal processing for ultrasonic imaging includes stacking, signal compensation, demodulation, rejection, and display. The submerged slopes were detected by horizontally scanning over the specimen tank with the transducers to produce ultrasonic reflection images based on the impedance mismatch. The ultrasonic wave using focal type transducers can effectively detect interfaces, even at slope, with high resolution.
