Evaluation of interpolation methods in study of bed morphology of rivers and water channels

The study of changes of sediment beds is of the issues which has attracted river engineers. Attention to investigate the rate of scour and sedimentation is significant in studies of rivers. The change of bed topography, scour and sedimentation pattern have caught the attention of hydraulic engineering profession. This paper examines the topography changes using experimental data in a laboratory flume with a length of 8 meters and a width of 0.255 cm and changes of bed morphological will be discussed. For this purpose, interpolate methods contained in the Surfer used to convert point measurement to continuous surfaces. Accuracy assessment accomplished by validation method and MAE, RMSE also. The result showed that Minimum Curvature and Kriging methods have best accuracy to create surfaces for studying changes of bed morphology in rivers.