Stream Simulation Design Process - USDA Forest Service

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Unconfined channel - consider these modifications • Hydraulic / Stability analysis when floodplain conveyance high • Increase culvert width, Improve inlet contraction • Add floodplain culverts (when either Q10 floodplain > 4 x BFW ?) • Add road dips and armor embankment If channel is backwatered during high water, these modifications may not be necessary
Design for sustainability, especially when backwatering is limited or absent Road Fill Road Dip Floodplain culvert in flood swale Reference channel bankfull cross section Culvert width including floodplain Floodprone width 1. Design the channel and floodplain 2. Design the culvert to fit
Page 1 and 2: Stream Simulation Design Process As
Page 3 and 4: Stream Simulation How big is it?
Page 5 and 6: Culvert Size 1. Based on Project Ob
Page 7 and 8: Bed profile elevation; average of m
Page 9 and 10: Stream Simulation - gentle gradient
Page 11 and 12: Stream Simulation culvert width •
Page 13: Stream Simulation culvert width b.
Page 17 and 18: The same stream simulation can usua
Page 19 and 20: Pipes • Maximum embedment = where
Page 21 and 22: Barnard
Page 23 and 24: Box Standard Arch Arches (embedment
Page 25 and 26: Bankfull width structure after 16 y
Page 27 and 28: Bridge Structures Wood: Glue lamina
Page 29 and 30: Bridges are beautiful, but don’t
Page 31 and 32: A Much Better Bridge Nice! Hey, aqu
Page 33 and 34: Geometry & Fit Considerations • R
Page 35 and 36: Structure shape versus channel shap
Page 37 and 38: Structure shape versus channel shap
Page 39 and 40: High and Low Profile Structures Low
Page 41 and 42: Bottomless Arch Miscellaneous Place
Page 43 and 44: COSTS $160,000 $140,000 $120,000 $1
Page 45 and 46: Changing from 8’ open bottom arch
Page 47 and 48: Durability - Abrasion Abrasion rate
Page 49 and 50: “Normal” Corrosion & Abrasion i
Page 51 and 52: 1. For 16 gage galvanized steel, th
Page 53 and 54: The minimum adequate structural thi
Page 55 and 56: Foundation Conditions and Slope Sta
Page 57 and 58: Bearing Capacity & failure modes pi
Page 59 and 60: Footing Shapes for Open Bottom Arch

Stream Simulation Design Process - USDA Forest Service

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