Coastal depth and coastal geomorphology are the important research focuses of coastal waters and are important factors in coastal environment. Their measurements play an important role in safety of shipping, research of ocean science, simulation of coastal storm surge, construction of coastal facilities, management of coastal zone, detection of shoreline erosion, and so on. Remote sensing technology is an important method for water depth measurement because of its own advantages currently, and it has great value of practical application. East Gong Island in South China Sea was taken as a typical study area. The band ratio model was established by using measured points and three multispectral images of Landsat-8, SPOT-6 and WorldView-2. The band ratio model with the highest accuracy is selected for depth inversion. The results show that the accuracy of the SPOT-6 image is the highest. Meanwhile, analyzing the error of inversion from different depth ranges, the accuracy of the inversion is lower in the range of 0–5 m. The inversion accuracy of 5–10 m is the highest, and the inversion error increases with the increase of depth. The factors affecting the accuracy of the water depth inversion are discussed. It is necessary to strengthen the research of remote sensor and inversion model in order to further improve the accuracy of inversion.
Part of the book: Sea Level Rise and Coastal Infrastructure