Characterizing the Fish Passage Environment at The Dalles Dam Spillway: 2001-2004

Richmond, Marshall C. ; Carlson, Thomas J. ; Serkowski, John A. ; Cook, Chris B. ; Duncan, Joanne P. ; Perkins, William A.

Pacific Northwest National Laboratory (U.S.)

关键词: Fluid Mechanics;    Columbia River;    Navier-Stokes Equations Columbia River;    Computational Fluid Dynamics;    Dams;   

DOI  :  10.2172/926967
RP-ID  :  PNNL-16521
RP-ID  :  AC05-76RL01830
RP-ID  :  926967

美国|英语

来源: UNT Digital Library

【 摘 要 】

The spill environment at The Dalles Dam in 2001-2004 was characterized using a field-deployed autonomous sensor (the so-called Sensor Fish), computational fluid dynamics (CFD) modeling, and Lagrangian particle tracking. The sensor fish has a self-contained capability to digitally the record pressure and triaxial accelerations it was exposed to following its release into the spillway. After recovery downstream of the tailrace, the data stored in the memory of the sensor are downloaded and stored for analysis. The spillway, stilling basin, and tailrace hydrodynamics were simulated using an unsteady, free-surface, three-dimensional CFD code that solved the Reynolds-averaged Navier-Stokes equations in conjunction with a two-equation turbulence model. The results from the CFD simulations were then used in a Lagrangian particle tracking model that included the effects of mass, drag, and buoyancy in the particle equation of motion. A random walk method was used to simulate the effects of small-scale turbulence on the particle motion. Several operational and structural conditions were evaluated using the Sensor Fish, CFD, and particle tracking. Quantifying events such as strike and stilling basin retention time characterized exposure conditions in the spill environment.