The Stability of Inshore Seabed Based on the Precise Underwater Monitoring Method

Abstract

Due to the effect of geological structure, tide and tidal current, the stability of inshore seabed is always a focus problem, especially for the great engineering construction such as inshore wharf, nuclear power station, and so on. Underwater deforming monitoring has its special relative to onshore monitoring. Due to the limitation of monitoring means, the traditional method for monitoring seabed stability is difficult to acquire centimeter accuracy, especially in vertical direction. Thus, this contribution presents a precise method for monitoring seabed stability. Several techniques are integrated in this method, such as GPS RTK/PPK, precise sounding, inertia navigation, attitude correction and quality control. A project has proved that this method and system can reach 7-centimeter accuracy, and can really use for precise seabed monitoring.