Surface Water Prize

yang_pcture Dr. Chih Ted Yang of Colorado State University (USA).

Topic: Sedimentation Control in Surface Water Systems

Dr. Yang has made significant contributions to the understanding of sediment transport and river hydraulics, particularly through the development of the Unit Stream Power Equation. The equation provides accurate predictions of total sediment discharge in natural rivers under diversified flow and sediment conditions. It also has proven utility for engineering concerns where sediment transport is an issue.

In his association with the US Department of the Interior, he has provided leadership in developing standard computational procedures for handling sediment transport in alluvial rivers. He has developed the well-known GSTARS Program for sediment computations.

GSTARS is a series of Generalized Stream Tube computer models for Alluvial River Simulation developed by Dr. Yang and his colleagues for the U.S. Bureau of Reclamation.

The first version of GSTARS was developed by Molinas and Yang back in 1985 for mainframe computers to simulate the flow conditions in a semi-two-dimensional manner and the change of channel geometry in a semi-three-dimensional manner based on the stream tube concept.

In 1988, GSTARS 2.0 was developed to significantly expand the program’s capabilities and adapt it for PC applications.

With a new graphical interface, GSTARS 2.1 replaced GSTARS 2.0 in the year 2000 for cohesive and non-cohesive sediment transport in rivers.

GSTARS 3, developed in 2002, further expanded the capabilities of GSTARS 2.1.

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