PROJECT DATA Project Title: Modena Union Street Bridge Project File : unionst.prj Run Date and Time: 9/6/03 7:47:22 AM. Project in English units

Transcription

1 HEC-RAS Version 3.1 November 2002 U.S. Army Corp of Engineers Hydrologic Engineering Center 609 Second Street, Suite D Davis, California (916) X X XXXXXX XXXX XXXX XX XXXX X X X X X X X X X X X X X X X X X X X XXXXXXX XXXX X XXX XXXX XXXXXX XXXX X X X X X X X X X X X X X X X X X X X X X XXXXXX XXXX X X X X XXXXX PROJECT DATA Project Title: Modena Union Street Bridge Project File : unionst.prj Run Date and Time: 9/6/03 7:47:22 AM Project in English units Project Union Street Bridge Analysis PLAN DATA Plan Title: mixed flows Plan File : C:\Program Files\HEC\Ras\modina\unionst.p02 Geometry Title: West Branch of Brandywine Creek Geometry File : C:\Program Files\HEC\Ras\modina\unionst.g01 Flow Title Flow File : Union Street Flow : C:\Program Files\HEC\Ras\modina\unionst.f01

2 Plan Summary Information: Number of: Cross Sections = 10 Mulitple Openings = 0 Culverts = 0 Inline Structures = 0 Bridges = 1 Lateral Structures = 0 Computational Information Water surface calculation tolerance = 0.01 Critical depth calculaton tolerance = 0.01 Maximum number of interations = 20 Maximum difference tolerance = 0.3 Flow tolerance factor = Computation Options Critical depth computed only where necessary Conveyance Calculation Method: At breaks in n values only Friction Slope Method: Average Conveyance Computational Flow Regime: Mixed Flow FLOW DATA Flow Title: Union Street Flow Flow File : C:\Program Files\HEC\Ras\modina\unionst.f01 Flow Data (cfs) River Reach RS 100 Yr 500 Yr West Branch Bran Boundary Conditions River Reach Profile Upstream Downstream West Branch Bran1 100 Yr Known WS = 98.4 Known WS = 0 West Branch Bran1 500 Yr Known WS = 0 Known WS = 0

3 GEOMETRY DATA Geometry Title: West Branch of Brandywine Creek Geometry File : C:\Program Files\HEC\Ras\modina\unionst.g01 REACH: 1 RS: 70 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.67 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 5.07 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.69 Stream Power (lb/ft s)

4 Frctn Loss (ft) 0.22 Cum Volume (acre-ft) C & E Loss (ft) 0.01 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 60 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.76 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 5.43 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.66 Stream Power (lb/ft s) Frctn Loss (ft) 0.12 Cum Volume (acre-ft) C & E Loss (ft) 0.02 Cum SA (acres)

5 Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 50 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.97 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 6.85 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.34 Stream Power (lb/ft s) Frctn Loss (ft) 0.24 Cum Volume (acre-ft) C & E Loss (ft) 0.03 Cum SA (acres)

6 Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 40 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.30 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 8.03 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.30 Stream Power (lb/ft s) Frctn Loss (ft) 0.19 Cum Volume (acre-ft) C & E Loss (ft) 0.04 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface.

7 REACH: 1 RS: 36 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.15 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 7.96 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) 1.00 Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.17 Stream Power (lb/ft s) Frctn Loss (ft) 0.00 Cum Volume (acre-ft) C & E Loss (ft) 0.16 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface. BRIDGE

8 REACH: 1 RS: 35 Existing Bridge Structure Distance from Upstream XS = 1 Deck/Roadway Width = 33 Weir Coefficient = 2.6 Upstream Deck/Roadway Coordinates num= 7 Sta Hi Cord Lo Cord Sta Hi Cord Lo Cord Sta Hi Cord Lo Cord Upstream Bridge Cross Section Data Station Elevation Data num= Bank Sta: Left Right Coeff Contr. Expan Downstream Deck/Roadway Coordinates num= 7 Sta Hi Cord Lo Cord Sta Hi Cord Lo Cord Sta Hi Cord Lo Cord Downstream Bridge Cross Section Data Station Elevation Data num=

9 Bank Sta: Left Right Coeff Contr. Expan Upstream Embankment side slope = 0 horiz. to 1.0 vertical Downstream Embankment side slope = 0 horiz. to 1.0 vertical Maximum allowable submergence for weir flow =.95 Elevation at which weir flow begins = Energy head used in spillway design = Spillway height used in design = Weir crest shape = Broad Crested Number of Piers = 1 Pier Data Pier Station Upstream= 0 Downstream= 0 Upstream num= 2 Width Elev Width Elev Downstream num= 2 Width Elev Width Elev Number of Bridge Coefficient Sets = 1 Low Flow Methods and Data Energy Momentum Cd = 1.33 Yarnell KVal =.9 Selected Low Flow Methods = Highest Energy Answer High Flow Method Energy Only Additional Bridge Parameters Add Friction component to Momentum Do not add Weight component to Momentum Class B flow critical depth computations use critical depth inside the bridge at the upstream end Criteria to check for pressure flow = Upstream energy grade line

10 BRIDGE OUTPUT Profile #100 Yr E.G. US. (ft) Element Inside BR US Inside BR DS W.S. US. (ft) E.G. Elev (ft) Q Total (cfs) W.S. Elev (ft) Q Bridge (cfs) Crit W.S. (ft) Q Weir (cfs) Max Chl Dpth (ft) Weir Sta Lft (ft) Vel Total (ft/s) Weir Sta Rgt (ft) Flow Area (sq ft) Weir Submerg Froude # Chl Weir Max Depth (ft) Specif Force (cu ft) Min El Weir Flow (ft) Hydr Depth (ft) Min El Prs (ft) W.P. Total (ft) Delta EG (ft) 1.18 Conv. Total (cfs) Delta WS (ft) 1.47 Top Width (ft) BR Open Area (sq ft) Frctn Loss (ft) BR Open Vel (ft/s) C & E Loss (ft) Coef of Q Shear Total (lb/sq ft) Br Sel Method Energy only Power Total (lb/ft s) Note: Yarnell answer is not valid if the water surface is above the low chord or if there is weir flow. The Yarnell answer has been disregarded. Note: Momentum answer is not valid if the water surface is above the low chord or if there is weir flow. The momentum answer has been disregarded. REACH: 1 RS: 34 Station Elevation Data num=

11 Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.45 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 9.31 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.08 Stream Power (lb/ft s) Frctn Loss (ft) 0.32 Cum Volume (acre-ft) C & E Loss (ft) 0.05 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 30 Station Elevation Data num=

12 Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.30 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 8.37 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.20 Stream Power (lb/ft s) Frctn Loss (ft) 0.38 Cum Volume (acre-ft) C & E Loss (ft) 0.16 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 20 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan

13 E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 0.75 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 5.24 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.77 Stream Power (lb/ft s) Frctn Loss (ft) 0.28 Cum Volume (acre-ft) C & E Loss (ft) 0.12 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 10 Station Elevation Data num= Bank Sta: Left Right Lengths: Left Channel Right Coeff Contr. Expan

14 E.G. Elev (ft) Element Left OB Channel Right OB Vel Head (ft) 1.93 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 8.86 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.59 Stream Power (lb/ft s) Frctn Loss (ft) 0.59 Cum Volume (acre-ft) C & E Loss (ft) 0.05 Cum SA (acres) Warning: The cross-section end points had to be extended vertically for the computed water surface. REACH: 1 RS: 0 Station Elevation Data num= Bank Sta: Left Right Coeff Contr. Expan E.G. Elev (ft) Element Left OB Channel Right OB

15 Vel Head (ft) 2.43 Wt. n-val W.S. Elev (ft) Reach Len. (ft) Crit W.S. (ft) Flow Area (sq ft) E.G. Slope (ft/ft) Area (sq ft) Q Total (cfs) Flow (cfs) Top Width (ft) Top Width (ft) Vel Total (ft/s) 9.79 Avg. Vel. (ft/s) Max Chl Dpth (ft) Hydr. Depth (ft) Conv. Total (cfs) Conv. (cfs) Length Wtd. (ft) Wetted Per. (ft) Min Ch El (ft) Shear (lb/sq ft) Alpha 1.63 Stream Power (lb/ft s) Frctn Loss (ft) Cum Volume (acre-ft) C & E Loss (ft) Cum SA (acres) SUMMARY OF MANNING'S N VALUES River:West Branch Bran Reach River Sta. n1 n2 n Bridge SUMMARY OF REACH LENGTHS River: West Branch Bran

16 Reach River Sta. Left Channel Right Bridge SUMMARY OF CONTRACTION AND EXPANSION COEFFICIENTS River: West Branch Bran Reach River Sta. Contr. Expan Bridge