Creating rectangular bathymetry grids for environmental numerical modelling of gravel-bed rivers

摘要: Abstract The accuracy of bathymetry grids used in the numerical modelling gravel-bed rivers has been identified as a potential limiting factor to model output. This paper addresses creation two-dimensional rectangular from irregular data for rivers. A procedure based on kriging algorithm is presented. major features are detrending data, addition extra knowledge sources such photographs and site visits, well use semi-variogram. calculated grid residual variance significantly lower when followed than method applied “black-box” fashion.