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Precipitation-Runoff and Streamflow-Routing Models for the ...

Precipitation-Runoff and Streamflow-Routing Models for the ...

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APPENDIX 1. STREAM GEOMETRY FOR MAIN STEM AND MAJOR TRIBUTARIES OF THE WILLAMETTE RIVER, OREGON, AT SELECTEDINTERVALS—CONTINUEDJohnson Creek from Sycamore (RM 10.2) to mouthRiver Reach | Low Flow | High Flow |Mile Sta. Length Location Elev Slope Disch. Width Vel. Area Time Disch. Width Vel. Area Time(mi) (ft) (ft/ft) (ft 3 /s (ft) (ft/s) (ft 2 ) (hrs)(ft 3 /s) (ft) (ft/s) (ft 2 ) (hrs)0.0 10.2 Mouth 3.360.7 9.5 0.7 Gage 14211550 20.00 0.004502 15.0 30 1.40 10.8 0.7 4300 70 9.6 450 0.11.3 8.9 0.6 Crystal Springs 40.00 0.006313 15.0 25 1.40 10.8 0.6 4300 70 9.6 450 0.12.9 7.3 1.6 Pepco RR Bridge 95.00 0.006510 2.0 25 0.63 3.2 3.7 4200 64 8.5 492 0.35.5 4.7 2.6 Hwy 213 Bridge (82nd 185.00 0.006556 1.9 20 0.57 3.4 6.7 4150 54 7.7 537 0.56.2 4.0 0.7 I 205 Bridge 195.00 0.002706 1.9 20 0.52 3.7 2.0 4100 54 7.0 582 0.17.0 3.2 0.8 Beggars Tick Marsh 202.00 0.001657 1.8 20 0.41 4.4 2.9 4100 53 5.6 727 0.27.6 2.6 0.6 LB Trib. (112th St.) 205.00 0.000947 1.6 15 0.44 3.7 2.0 3970 44 6.2 638 0.19.2 1.0 1.6 LB Trib. (Deardorff 224.00 0.002249 1.4 15 0.42 3.4 5.6 3770 44 6.1 617 0.410.2 0.0 1.0 Gage 14211500 229.00 0.000947 1.2 15 0.40 3.0 3.7 3570 44 6.0 595 0.278River DAFLOW Parameter Values DiffusionMile Area Width CoefficientA1 A2 A0 W1 W2 Low High0.7 1.90 0.64 6 12.1 0.210 78 68111.3 1.90 0.64 4 13.8 0.210 49 42592.9 3.00 0.64 28 9.4 0.180 14 76445.5 2.20 0.62 13 13.1 0.200 10 45666.2 2.20 0.62 4 17.6 0.260 17 49517.0 3.00 0.62 9 15.0 0.180 33 184507.6 3.00 0.62 17 16.2 0.180 48 291169.2 4.00 0.60 26 18.2 0.260 16 541210.2 4.10 0.60 12 15.7 0.200 39 23381

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