User's Manual for BRI-STARS (BRIdge Stream Tube Model for Alluvial RiverSimulation)

摘要

ng channel widening/narrowing phenomena as well as local scour due to highwayencroachments. It contains a subset of Federal Highway Administration's WSPRO subroutines for computing bridge hydraulics. The first major component of BRI-STARS is the water surface profile and streambed variation computations using stream tubes for fixed-channel width under subcritical, supercritical, and the combination of both flow conditions. It is composed of three major computational blocks: backwater computations, stream tube computations, and sediment routing computations. These computational blocks are linked together during the operation of the model. Both energy and momentum equations are used so the water surface profile computation can be carried out through combinations of subcritical and supercritical flows without interruption. The BRI-STARS (Bridge Stream Tube model for Alluvial Simulation) model is a generalized semi-two-dimensional water and sediment-routing model with an integrated graphical interface for solving complicated river engineering problems with limited data and resources. This model is capable of computing alluvial scour/deposition through subcritical, supercritical, and a combination of both flow conditions involving hydraulic jumps.