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Table A4. Continued. General Flow/Temperature Relevant Studies Recommendations (Muth et al. Anticipated Effects and Uncertainties (Hypotheses) (primary studies in bold) 2000) Reach 3---...sulllmer Through Winter Base Rate of decline from peak flow to Anticipated Effects base flow should be gradual but will A16. Wet and Moderately Wet: Lower water temperatures at A16-1. Project 138 depend largely on rates of decline in higher base flows in the wettest years may reduce growth and AI6-2. Project 128 tributary flows. Base flow should be surviyal of young endangered fish. A16-3. Project 129 reached by early to middle summer Average, Dry, and Moderately Dry: Higher water temperatures at (depending on hydrologic lower base flows will enhance growth and survival of young conditions) and maintained through endangered fish, particularly Colorado pikeminnow and February. Actual base flows in humpback chubs (Muth et al. 2000). Reach 3 will depend on flows Uncertainties. targeted for Reach 2 and U23. The effect of peak flows, sediment availability, and U23-1. Project 138 contributions from intervening antecedent conditions on the relationship between base flow level U23-2. Project 85f tributaries. and backwater habitat availability (Muth et al. 2000). U24. The effect of base flow variability (within-season, within- U24-1. Project 138 year, between years) on backwater habitat quality (e.g., temperature, productivity) (U.S. Department of the Interior and Western Area Power Administration 2005). U25. The effect of base flows on nonnative fish populations (U.S. U25-1. Project 123 Fish and Wildlife Service 2005). U25-2. Project 109 U25-3. Projects C-18/l9 U25-4. Project 144 U25-5. Project 124 c;') ~ ~ ~ ~ ::tl V) "-l 8 ""<: "'tl ~ ;1> I tv tv ~ ~ '"'l I:: l::l ~ ,tv tv <::::> <::::> 'I