Comparative Analysis of the Semi-Empirical Physical Models for Shallow Water Depth Inversion in Beibu Gulf

In the research and development of the coastal ocean, the data of coastal water depth is very important. At present, the development of multispectral satellite water depth measurement is very rapid. In the actual water depth inversion, single-band method, double band method (ratio logarithm method), and multi-band method which are belonging to lyzenga's method, and Strumpf's logarithm ratio method, are widely used. But few people make a comparative analysis of these methods and study their differences. This paper uses the landsat8 oil data and multibeam depth data of Weizhou Island in Guangxi, preprocesses the oil data such as land water separation and atmospheric correction, and then retrieve the water depth by single band method, dual-band method(ratio logarithm method), multi-band method and Strumpf's logarithm ratio method, and uses standard deviation and R2 to evaluate the results of retrieving the water depth.