Development of a Numerical Fish Surrogate for Improved Selection of Fish Passage Design and Operation Alternatives for Lower Granite Dam: Phase I

Environmental Laboratory Approved for public release; distribution is unlimited. The contents of this report are not to be used for advertising, publication, or promotional purposes. Citation of trade names does not constitute an official endorsement or approval of the use of such commercial products. The findings of this report are not to be construed as an official Department of the Army position, unless so designated by other authorized documents. Figure 4. Conceptualization of how 3-dimensional hydroacoustics data and idealized output grid of CFD modeling are placed into a common coordinate system .. Figure 6. A bilinear spline was employed to interpolate hydraulic information at the nodes to various positions relative to the fish either to determine hydraulic gradients passing through the fish or to determine hydraulic conditions at the location of the fish..... 13 Figure 7. Comparison of traces expected from modeling movement as a random walk (left subplot) versus modeling movement as random process in which the distance traveled is random but direction of movement is conserved between one steps (right subplot). Direction of movement will change when either a repelling hydraulic feature is encountered or when a random reversal in movement occurs.. v Figure 10. Merging data collected using a Eulerian reference frame with data collected using a Lagrangian reference frame generates a coupled Eulerian-Lagrangian frame of reference capable of simulating complex processes .. Figure 12. Future methods for calibrating behavior models. In a coupled Eulerian-Lagrangian framework, the adequacy of the simulation can be determined by how well the results of statistical analysis of the virtual system matches the statistical analysis of the real system in terms of R-Square, variables and their weights, and Figure 13. Transforming physical space to contravariant space allows all computations and georeferencing to be performed in unit square space for planes and unit cubed space for volumes.. Preface Reasonable and Prudent Alternatives (RPA) 11 of the Biological Opinion for the restoration of Columbia River salmon stocks directs the U.S. Corps of Engineers to investigate the application of surface collection technology at lower Snake and Columbia River projects. Identifying optimum design or operations of Columbia River basin dams for passage of juvenile salmon requires collection and integration of both hydraulic and biological information. This report describes a quantitative method for combining biological and hydraulic information into a coupled Eulerian-Lagrangian framework ideally suited to this task. The method will be completed in FY00 and will …