What is Nays1d+?

Nays1d+ is a1-dimensional solver for flow and morphology in rivers with a general (or spatially averaged) cross-sectional shape written by Professor Ichiro Kimura from Toyama University. The solver includes both steady and unsteady nonuniform flows. The solver also calculates bed deformation considering only bedload. Obstacles such as bridge piers and spur-dikes and inflow from tributaries can be also considered in the computations. The user can visualize the results using two-dimensional visualization windows in iRIC with the methods of color contours, vectors, particle tracking, and so forth.