Development and Validation of GSTARS-1D, A General Sediment Transport Model for Alluvial River Simulation - One Dimensional

Abstract

GSTARS-1D, Generalized Sediment Transport model for Alluvial River Simulation – One Dimensional, is the latest development in the GSTARS series. GSTARS-1D is a hydraulic and sediment transport numerical model developed to simulate flows in rivers and channels with or without movable boundaries. It is able to compute water surface profiles in single channels, simple channel networks, and complex channel networks. It has both steady and unsteady flow models, many sediment transport equations, floodplain simulation, and computation of width changes using a minimization theory. Lateral inflows can be simulated along with internal boundary conditions, such as time -stage tables, rating curves, weirs, bridges, and radial gates. Two examples are presented in this paper. The first example shows the capability of the network channel simulation with sediment transport. The second example illustrates the use of the unsteady flow and unsteady sediment transport features of GSTARS-1D in real engineering problems with hydraulic structures.