Details:

Creators:
Molinas, Albert
Corporate Creators:
United States. Federal Highway Administration. Office of Infrastructure Research and Development
Contributors:
Jones, J. Sterling
Corporate Contributors:
Hydrau-Tech, Inc.
Subject/TRT Terms:
[+]
Abutment Scour Bridges Bridge Scour Channel Bed Scour Hydraulics Local Scour Minimum Stream Power Numerical Analysis Numerical Model Piers (Supports) Pier Scour River Simulation Scour Sediments Sediment Transport Simulation Stream Gages Stream Tube Water Surface Profile
Publication/ Report Number:
FHWA-RD-99-190
Resource Type:
Tech Report
Geographical Coverage:
United States
Contracting Officer:
Jones, J. Sterling
Corporate Publisher:
United States. Federal Highway Administration. Office of Infrastructure Research and Development
Abstract:
BRI-STARS (BRidge Stream Tube model for Alluvial River 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. Unlike conventional water and sediment rout1ng models, it is also capable of simulating channel widening/narrowing phenomena as well as local scour due to highway encroachments. 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 stream tube concept is used in a semi-two-dimensional way, which allows the lateral and longitudinal variation of hydraulic conditions as well as sediment activity at various cross sections along the study reach. The sediment continuity equation and sediment transport capacity equations are used for sediment routing computations to simulate the general scour in the river bed elevation. The sediment routing is performed for each size fraction to account for the bed composition changes and the bed armoring processes. The second major component of the BRI-5TARS is a variable width stream tube model. The minimum rate of energy dissipation theory is used for decisions as to whether the channel adjustments taking place at a given cross section due to scouring/deposition should advance in the lateral or vertical directions. Finally, the third component of BRISTARS allows the computation of the hydraulic flow variables and the resulting local scour due to highway bridge encroachments. The WSPRO component allows modeling of bridge hydraulics. This User's Manual provides a theoretical background on the methodologies used by the model as well as the formulations of governing flow and sediment routing procedures. Various records needed for the operation of the model, their description, format, and sequential positioning within the data structure are given. Example applications as well as practical guidelines for the use of the model are presented.
Content Notes:
Contracting Officer's Technical Representative: J. Sterling Jones, HRDI-07
Format:
PDF
Funding:
DTFH61-93-C-00068
Collection(s):
Federal Highway Administration
Main Document Checksum:
[+]
urn:sha256:e3c8c1d67f5f2584a672fb731372222bb41f5282dde5e693c91dda366456d095
Download URL:
https://rosap.ntl.bts.gov/view/dot/50262/dot_50262_DS1.pdf
File Type:

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