Page - 135 - in Book of Full Papers - Symposium Hydro Engineering

Feature Analyzed Model Type Modeling Objective 3-D (computational fluid dynamics [CFD]) models  Refine/update the results from 1-D models.  Assess conditions for which 1-D or 2-D models were not appropriate. 1:50 scale physical model  Validate results from 1-D and 3-D models.  Study flow phenomenon for which numerical models were highly uncertain or calibration difficult. Emergency Spillway 2-D models  Predict depth and velocity of flow on the hill slope downstream of Emergency Spillway to inform design decisions by structural, geotechnical, and geological engineers. 3-D CFD models  Refine results from 2-D models.  Assess and refine design of roller- compacted concrete (RCC) buttress for the concrete monoliths, which cannot be modeled well with simpler models.  Simulate discharge from ogee crest for multiple buttress alternatives. 6.1. FCO SPILLWAY CHUTE ANALYSIS Hydraulic analyses of the FCO Spillway chute: (1) led to refinement of the FCO Spillway chute alignment (profile); (2) provided information about depths and velocities along the chute; and (3) provided information necessary to assess the potential for cavitation along the chute as flows reached capacity. 6.1.1. FCO Spillway Chute Profile Analysis The initial profile of the FCO Spillway chute closely followed the original natural terrain to minimize the excavation as well as the disturbances of the underlying rock due to blasting. This as-built FCO Spillway chute profile has one vertical curve. Modeling led to refinements in this chute profile, with the recommended chute profile curve lengthened and replaced by two curves. The new profile is hydraulically superior to the original as-built chute profile as it 135