Monitoring of water bodies by remote methods

Abstract

A technique has been developed that allows determining the volume of water resources of hydro-graphic objects using materials from remote sensing of the Earth and a digital terrain model (DEM) of the terrain. The task is relevant, especially in conditions of inaccessibility or difficult approaches to the object. The technique includes the use or construction of a DEM of the bottom of a water body according to bathymetric survey data, the transformation of satellite images into a projection most corresponding to the Earth's surface at these latitudes, the definition of the contour of the shoreline of the reservoir and the calculation of the volume of water. For the purpose of testing, a shallow-water object was selected on the territory of Russia, for which seasonal fluctuations in the water level lead to significant changes in resources. The results revealed a good convergence of the proposed approaches with the accumulated materials of traditional bathymetric survey.