Location
Construction & Engineering Hall, Oregon State University
Start Date
25-6-2013 1:50 PM
End Date
25-6-2013 2:10 PM
Description
There are several sediment processes initiated when large dams are removed and predicting these processes is one of the most challenging aspects of dam removal. We discuss the general capabilities and limitations of analytical, one-dimensional (1D), and two-dimensional (2D) models to simulate the sediment processes that occur upon dam removal. An easy to apply analytical model that simulates movement of sediment accumulations provides a conceptual and general prediction of the deposition downstream. A 1D sediment transport model (SRH-1D) is verified against a laboratory experiment to demonstrate the ability to model an incising channel through a reservoir delta. While 1D models are useful, they require the specification of the erosion width as a function of flow and the 1D model cannot represent complex interactions with reservoir bathymetry. 2D models can more directly incorporate these effects and such a 2D model (SRH-2D) is used to simulation erosion during reservoir draw down.
Concurrent Sessions A: Dam Removal II - Simulation of Sediment Transport Upon Dam Removal
Construction & Engineering Hall, Oregon State University
There are several sediment processes initiated when large dams are removed and predicting these processes is one of the most challenging aspects of dam removal. We discuss the general capabilities and limitations of analytical, one-dimensional (1D), and two-dimensional (2D) models to simulate the sediment processes that occur upon dam removal. An easy to apply analytical model that simulates movement of sediment accumulations provides a conceptual and general prediction of the deposition downstream. A 1D sediment transport model (SRH-1D) is verified against a laboratory experiment to demonstrate the ability to model an incising channel through a reservoir delta. While 1D models are useful, they require the specification of the erosion width as a function of flow and the 1D model cannot represent complex interactions with reservoir bathymetry. 2D models can more directly incorporate these effects and such a 2D model (SRH-2D) is used to simulation erosion during reservoir draw down.
Comments
Blair Greimann received his PhD from University of Iowa in 1998 at the Institute of Hydraulic Research. He has worked at the Denver Technical Service Center for the Bureau of Reclamation for almost 15 years. He has performed analysis for or provided technical review of Matilija Dam, Klamath Dams, Elwha and Glines Canyon Dam, San Celmente Dam, and Battle Creek Dam Removal Projects.