Bathymetry Retrieval from Remote Sensing Data in Shallow Water of Marsa Alam, Egypt, Based on Multispectral Satellite Imagery

Satellite imaging provides a whole spectral characterization of a region in digital type. These data are being employed for various vital applications at shallow coastal areas like Bathymetric information which is important for the applications of hydrological engineering like the processes of sedimentary and the studies of coastal. Multispectral satellite imagery has given a great coverage, low price and time-effective resolution for bathymetric measurements. The current study evaluates performance of 2 models to measure water depth within the south of Marsa Alam center—Red Sea Governorate on Halaib and Shalatin road. The models are neural network fitting algorithms (NN) and the bagged regression trees (BAG). Landsat 8 satellite imagery data was utilized to survey the execution of models. The used models were utilized to get the calculation of bathymetric maps in shallow coastal areas from multispectral satellite images using the reflectance values of (red, green) bands and the ratios of (green/red), and (blue/red) bands. The (BAG) resulted in RMSE 0.6219 m and R2 of 0.59 where (NN) yielded RMSE of 0.6911 m and R2 of 0.59 over shallow water depths. The BAG algorithm, produced the foremost reliable results by RMSE 0.6219 m and R2 of 0.59, tested to be the desirable algorithm for bathymetry calculation for study area.