External behavior analysis of dam by total station survey

Processing MBES Data to Detect Changes to Seafloor Topography

“…Especially, in urgent need of precision monitoring, are changes to seafloor topography (remnants and structures at the bottom of the sea) in order to get an accurate picture of all kinds of accidents happening on the coast, reflecting the huge importance of the coast in terms of geography and environment [2]. For such purposes, high-tech equipment is used such as MBES and GPS for 3D precision bathymetry for seafloor topography [3]. In addition, research has been conducted to store sounding data in the form of GIS data of vector or raster models after compensation through equipment examination, and to use them to detect changes to seafloor topography, investigate seafloor obstacles, and analyze the behavior of seafloor structures.…”

“…T Those studies include one that processed error sounding data collected on the coast with the post-processing technique and analyzed error sounding by topography [4], one that quantitatively calculated the behavior and damage of seafloor structures by examining the caisson wall inclinations or breakwater damage with MBES sounding [5][6][7], one that examined and analyzed changes to seafloor topography according to sand mining with MBES data [8], and one that studied postprocessing techniques for MBES data to improve the modeling of seafloor topography [3,6]. Those previous studies, however, focused on obtaining sounding data and compensation by considering sounding equipments, analysis of topographical changes according to sounding differences, and post-processing techniques, failing to systematically model seafloor topography and detect changes to it [9].…”