Spreadsheet Tools for Quantifying the Costs and Benefits of Two-Stage Channels J. Witter, A. Ward, D. Mecklenburg, J. D Ambrosio, S. Roley, and J. Tank AWRA Agricultural Hydrology and Water Quality II St. Louis, MO March 25, 2013
Decision Aids and Design Tools Assessment Reference Reach Spreadsheet Benefits Instream Nitrogen Tool Costs Two-Stage Ditch Cost Estimator Two-Stage Ditch Economic Analysis Design Two-Stage Cross Sections Bank Stability and Toe Erosion Model
http://www.dnr.state.oh.us/tabid/24137/default.aspx
Assessment: Reference Reach Spreadsheet Powell, G.E., A.D. Ward, D.E. Mecklenburg, and A.D. Jayakaran. 2007. Two-stage channel systems: Part 1, a practical approach for sizing agricultural ditches. JSWC 62(4): 277-286.
Assessment: Reference Reach Spreadsheet Profile Pattern Materials Dimension
Assessment: Reference Reach Spreadsheet Profile Sheet: Longitudinal Slope Profile
Assessment: Reference Reach Spreadsheet Meander Pattern - Channel Plan Form This Worksheet 1) This sheet will graph the distance and azmuth entered in the profile worksheet. 2) Fill in the values below using the graphed pattern, arial photos, topo maps, etc. 3) Before printing the graph, its width or height may need adjusting. "Square" the graph by clicking and dragging. Meander Length min max meander length (ft) 280 280 490 More Info Dogskin Run Little Muskingum Marietta Unit WNF East West Distance -300-250 -200-150 -100-50 0 50 250 200 150 Meander Width belt width (ft) 135 130 150 Bends amplitude (ft) radius (ft) 70 40 80 arc angle (degrees) 70 30 170 100 50 0 North South Distance Sinuosity stream length (ft) 388.4-50 valley length (ft) 285.9-100 Graph Format Z scale: 10 Dimensions (ft) Ratios Bankfull Width: 31.0 Sinuosity: 1.4 show banks Meander Length: 280 (280-490 ) Meander Length Ratio: 9 (9-15.8 ) Belt Width: 135 (130-150 ) Meander Width Ratio: 4.4 (4.2-4.8 ) show centerline Radius of Curvature: 70 (40-80 ) Radius / BkF Width: 2.3 (1.3-2.6 ) Reference Reach Stream: Dogskin Run Watershed: Little Muskingum Location: Marietta Unit WNF Latitude: 39.6346 Longitude: 81.0278 County: Munroe Date: June 24, 2002 Observers: Dan Mecklenburg, Dawn Farver, Andy Ward, Pam Stackler, Michelle Channel Type: C4 Drainage Area (sq.mi): 2.94 Pattern typical min max bankfull width (ft) 31.00 meander length (ft) 280.0 280.0 490.0 belt width (ft) 135.0 130.0 150.0 amplitude (ft) --- --- --- radius (ft) 70.0 40.0 80.0 arc angle (degrees) 70.0 30.0 170.0 stream length (ft) 388.4 valley length (ft) 285.9 Sinuosity 1.4 Meander Length Ratio 9.0 9.0 15.8 Meander Width Ratio 4.4 4.2 4.8 Radius Ratio 2.3 1.3 2.6 Pattern Sheet: Meander Plan Form
Assessment: Reference Reach Spreadsheet Two Individual Pebble Counts Weighted Pebble Count Sieve Analysis for Two Bulk Samples Materials Sheet
Assessment: Reference Reach Spreadsheet Dimension Sheet: Cross sectional dimension X-section 1 X-section 2 X-section 8
Assessment: Reference Reach Spreadsheet Distance Foresight (Rod Reading)
Cross Section 3 Assessment: Reference Reach Spreadsheet Elevation (ft) 2 + 35.9 Dogskin Run, Riffle 102 100 98 96 94 92-40 -20 0 20 40 60 80 100 120 Width (ft) Bankfull Dimensions Flood Dimensions Materials 83.0 x-section area (ft.sq.) 126.7 W flood prone area (ft) 39 threshold grain size (mm): 49.6 width (ft) 2.6 entrenchment ratio 43 D50 Riffle (mm) 1.7 mean depth (ft) --- low bank height (ft) 72 D84 Riffle (mm) 2.8 max depth (ft) --- low bank height ratio 51.3 wetted parimeter (ft) 1.6 hyd radi (ft) 29.6 width-depth ratio Bankfull Flow Flow Resistance Forces & Power 5.2 velocity (ft/s) 0.035 Manning's roughness 0.78 channel slope (%) 429.3 discharge rate (cfs) 0.12 D'Arcy-Weisbach fric. 0.79 shear stress (lb/sq.ft.) 0.72 Froude number 8.1 resistance factor u/u* 0.64 shear velocity (ft/s) 7.1 relative roughness 4.2 unit strm power (lb/ft/s)
Assessment: Reference Reach Spreadsheet Comment Boxes explain equations, links or instructions
Benefits: Instream Nitrogen Tool Existing System
20.0 30.0 2.9
20.0 30.0 2.9
Benefits: Instream Nitrogen Tool Proposed Two-Stage System
Benefits: Instream Nitrogen Tool Denitrification Rates
Benefits: Instream Nitrogen Tool Hydrology
Benefits: Instream Nitrogen Tool Watershed Characteristics and Management
Benefits: Instream Nitrogen Tool Results Nitrogen Distribution 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Trapezoidal Two-Stage Total Export (lbs) Bed (lbs) Bench - Saturated (lbs) Bench - Unsaturated (lbs) Side Slopes (lbs) Buffer (lbs) Land Conversion (lbs) N Removed (lbs) 1600 1400 1200 1000 800 600 400 200 0 Trapezoidal Two-Stage Bed (lbs) Bench - Saturated (lbs) Bench - Unsaturated (lbs) Side Slopes (lbs) Buffer (lbs) Land Conversion (lbs)
Costs: Two-Stage Ditch Cost Estimator 1. Ditch Geometry
Costs: Two-Stage Ditch Cost Estimator 2. Earthwork
Costs: Two-Stage Ditch Cost Estimator 3. Tiles Outlets and Erosion Control Measures Outlet Protection Drop Structures Sloped Outlets Rock Chutes Berming Rip Rap Instream Structures
Costs: Two-Stage Ditch Cost Estimator 4. Seed and Seeding Costs
Costs: Two-Stage Ditch Cost Estimator 5. Land Value & Profitability
Costs - Two-Stage Ditch Cost Estimator 6. Maintenance Costs Mowing Spraying Clean Out
Costs: Two-Stage Ditch Economic Analysis
Design: Two-Stage Cross Section Plots Regional Geometry New Channel Dimensions Profile Cross Sections
Design: Two-Stage Cross Section Plots Existing Distance Rod Reading Proposed
Design: Two-Stage Cross Section Plots Cross Section 3 Earthwork Balance: cut 382 sq.ft. Bench Elevation: 704.4 ft -100-50 0 50 100 150 Width (ft) 716 714 712 710 708 706 704 702 700 Elevation (ft)
Design: Bank Stability and Toe Erosion Model 1. Channel Form
Design: Bank Stability and Toe Erosion Model 2. Vegetation and Bank/Toe Protection
Design: Bank Stability and Toe Erosion Model 3. Soil Physical Properties and Erodibility
Design: Bank Stability and Toe Erosion Model 4. Bank Stability
Design: Bank Stability and Toe Erosion Model 5. Hydraulic Erosion
Contact Information Jon Witter witter.7@osu.edu (614)292-6538 Andy Ward ward.2@osu.edu (614)292-9354 Jessica D Ambrosio dambrosio.9@osu.edu (614)247-7876