Concurrent Sessions C: Multi-Dimensional Modeling and Fish Passage Restoration - Use of Measured Data and Hydraulic Models for Evaluation of Constructed Fish Passage Structures

Channel wide fish passage structures have been installed throughout the Pacific Coast to allow movement of aquatic organisms, facilitate sediment transport, and provide debris conveyance. These structures are often designed using stream simulation or hydraulic design techniques. Very few of these projects are monitored to assess the post construction hydraulic characteristics and evaluate their performance relative to adjacent stream conditions or hydraulic design criteria. Monitoring is often difficult due to short flow durations and logistical constraints associated with personnel and equipment access. Comprehensive monitoring of hydraulic conditions requires multiple measurements throughout the range of fish passage design flows. These efforts are often costly and difficult to implement. This study investigates the use of episodic flow measurements combined with 2-dimensional modeling over a range flows to evaluate post project passage conditions