[A-OS14] Freshwater discharge from rivers and estuaries to the ocean

[AOS14-01] Development of the high-accuracy topography data for land hydrodynamic modelling

*Dai Yamazaki¹ (1.Institute of Industrial Sciences, The University of Tokyo)

Keywords:Topography data, Surface water, Modelling

Surface water dynamics can be described by relatively-simple governing equations, and it is not so difficult to construct a conveptual model. However, if we target to simulate the surface water dynamics of the actual world, high-accuracy topography datasets are required as boundary conditions. In developed countries such as Japan, a high-precision airborne DEM is often availale, but for most of the world spaceborne DEM (with non-negligible errors) is usually the only available source. Datasets on hydrography and under-water topography are usually not available in many parts of the world. In this presentation, latest works on high-accuracy topography data development in U-Tokyo will be introduced.