Large-Scale Channel Erosion Testing (ASTM D 6460) (Modified procedure used for vegetated channel tests)

Transcription

1 Large-Scale Channel Erosion Testing (ASTM D 6460) (Modified procedure used for vegetated channel tests) of East Coast Erosion Blanket ECP-3 Permanent Turf Reinforcement Mats over Loam December 2011 Submitted to: AASHTO/NTPEP 444 North Capitol Street, NW, Suite 249 Washington, D.C Attn: Evan Rothblatt, NTPEP erothblatt@aashto.org Submitted by: TRI/Environmental, Inc Bee Caves Road Austin, TX C. Joel Sprague Project Manager

2 December 12, 2011 Mr. Evan Rothblatt AASHTO/NTPEP 444 North Capitol Street, NW, Suite 249 Washington, D.C Subject: Channel Testing over Loam of East Coast Erosion Blanket s ECP-3, Triple Net Polymer Fiber Matting manufactured in Bernville, PA. Dear Mr. Rothblatt: This letter report presents the results for large-scale channel erosion tests performed on ECP-3, Triple Net Polymer Fiber Matting, over Loam. Included are data developed for target hydraulic shears ranging from 0.5 to 3+ psf (0.02 to kpa) for the unvegetated condition and from 1 to 13+ psf (0.04 to kpa) for the vegetated condition. All testing work was performed in general accordance with the ASTM D 6460, Standard Test Method for Determination of Rolled Erosion Control Product (RECP) Performance in Protecting Earthen Channels from Stormwater-Induced Erosion. The procedure was modified to use only single replicates when testing vegetated channels. Generated results were used to develop the following permissible or limiting shear (τ limit ) and limiting velocity (V limit ) for the tested material: ECP-3, Triple Net Polymer Fiber Matting & 4.5 staples/sy Product Unvegetated 6+ Week Vegetated 1+ Year Vegetated Condition Condition Condition Actual growth period, wks τ limit * 12.3* V limit * 25.0* * = ASTM D 6460 requires that three test replicates be performed using identical procedures to obtain an average threshold of performance. Thus, the results of vegetated testing, being single replicates of each condition, cannot be considered as an average threshold of performance. TRI is pleased to present this final report. Please feel free to call if we can answer any questions or provide any additional information. Sincerely, C. Joel Sprague, P.E. Senior Engineer Geosynthetics Services Division cc: Sam Allen, Jarrett Nelson - TRI

3 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 3 CHANNEL TESTING REPORT ECP-3, Triple Net Polymer Fiber Matting, over Loam TESTING EQUIPMENT AND PROCEDURES Overview of Test and Apparatus TRI/Environmental, Inc.'s (TRI's) large-scale channel erosion testing facility is located at the Denver Downs Research Farm in Anderson, SC. Testing oversight is provided by C. Joel Sprague, P.E. The large-scale testing is performed in a rectangular flume having a 10% slope (unvegetated condition) or 20% slope (vegetated condition) using a loamy soil test section. The concentrated flow is produced by raising gates to allow gravity flow from an adjacent pond. At least four sequential, increasing flows are applied to each test section for 30 minutes (unvegetated condition) or 1 hour (vegetated condition) each to achieve a range of hydraulic shear stresses in order to define the permissible, or limiting, shear stress, τ limit, which is the shear stress necessary to cause an average of 0.5 inch of soil loss over the entire channel bottom. Testing is performed in accordance with ASTM D 6460, though the procedure was modified to use only single replicates when testing vegetated channels. Tables and graphs of shear versus soil loss are generated from the accumulated data. Rolled Erosion Control Product (RECP) The following information and index properties were determined from the supplied product. Table 1. Tested Product Information & Index Properties Product Information and Index Property / Test Units Sampled Product Product Identification - ECP-3 Manufacturer - East Coast Erosion Blanket Manufacturing Plant Location - Bernville, PA Lot number of sample A Fiber - Polypropylene Netting Openings in 0.5 x 0.5 (approx) Stitching Spacing in 1.5 (approx) Tensile Strength MD x XD (ASTM D 6818) lb/in 104 x 116 Tensile Elongation MD x XD (ASTM D 6818) % 33 x 19 Thickness (ASTM D 6525) mils 345 Light Penetration (ASTM D 6567) % cover 83.8 Specific Gravity (ASTM D 792, Method A) Net Only g/cm Mass / Unit Area (ASTM D 6475) oz/sy Test Soil The test soil used in the test plots had the following characteristics.

4 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 4 Table 2. TRI-Loam Characteristics Soil Characteristic Test Method Value % Gravel 0 % Sand 45 ASTM D 422 % Silt 35 % Clay 20 Liquid Limit, % 41 ASTM D 4318 Plasticity Index, % 8 Soil Classification USDA Loam Soil Classification USCS Sandy silty clay (ML-CL) Preparation of the Test Channels The initial channel soil veneer (12-inch thick minimum) is placed and compacted. Compaction is verified to be 90% (± 3%) of Proctor Standard density using ASTM D 698 (sand cone method). The test channels undergo a standard preparation procedure prior to each test. First, any rills or depressions resulting from previous testing are filled in with test soil. The soil surface is replaced to a depth of 1 inch and groomed to create a channel bottom that is level side-to-side and at a smooth slope top-to-bottom. Finally, a vibrating plate compactor is run over the renewed channel surface. If a vegetated condition is to be tested, grass seed (tall fescue) is applied to the plot at the rate of 500 seeds per square foot. The submitted erosion control product is then installed using the anchors and anchorage pattern directed by the client. Installation of Erosion Control Product in Test Channel As noted, the submitted erosion control product is installed as directed by the client. For the tests reported herein, the erosion control product was anchored using a diamond anchorage pattern consisting of 2 x 8 steel staples to create an anchorage density of approximately 4.5 anchors per square yard. Specific Test Procedure Immediately prior to testing, the initial soil surface elevation readings are made at predetermined cross-sections. The channel is then exposed to sequential 30-minute (unvegetated condition) or 1-hour (vegetated condition) flows having target hydraulic shear stresses selected to create at least three flow events below and one flow event above the shear stress level that results in a cummulative average soil loss of ½-inch. During the testing, flow depth and corresponding flow measurements are taken at the predetermined cross-section locations. Between flow events, the flow is stopped and soil surface elevation measurements are made to facilitate calculation of soil loss. The flow is then restarted at the next desired flow (shear) level. Pictures of channel flows and resulting soil loss are shown in Figures 6 thru 12.

5 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 5 Figure 1. Typical 10% (Unvegetated Shear) Flumes on Left; 20% Flumes on Right Figure 4. Unvegetated RECP Figure Week Vegetated Shear in 20% Flumes; Recirculation Pump in Background Figure Week Vegetated RECP Figure 3. Typical 20% Temporary Flume Set Up 1+ Year Vegetated Shear Plots Figure Year Vegetated RECP

6 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 6 Figure 7. Typical Flow in Unvegetated Channel Figure 10. Unvegetated Channel after Test with RECP Removed (typical) Figure 8. Typical Flow in 6+ Week Vegetated Channel Figure Week Vegetated Channel after Test (typical) Figure 9. Typical Flow in 1+ Year Vegetated Channel Figure Year Vegetated Channel after Test (typical)

7 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 7 TEST RESULTS Average soil loss and the associated hydraulic shear calculated from flow and depth measurements made during the testing are the principle data used to determine the performance of the product tested. This data is entered into a spreadsheet that transforms the flow depth and velocity into an hydraulic shear stress and the soil loss measurements into an average Clopper Soil Loss Index (CSLI). Measured and calculated data is summarized in Table 3. A graph of shear versus soil loss for the protected condition is shown in Figure 13. The associated velocities and time of vegetation growth are plotted in Figures 14 and 15, respectively. The graphs include the best regression line fit to the test data to facilitate a determination of the limiting shear stress, τ limit,, and limiting velocity, V limit,. The 0.5-inch intercept values are provided in Table 4. Test # (Channel # - Shear Level) Table 3. Summary Data Table Protected Test Reach Actual Growth Period (wks) Flow depth (in) Flow velocity (fps) Flow (cfs) Manning s roughness, n Max Bed Shear Cumm. CSLI (in) C1-S1, Unvegetated C1-S2, Unvegetated C1-S3, Unvegetated C1-S4, Unvegetated C1-S5, Unvegetated C2-S1, Unvegetated C2-S2, Unvegetated C2-S3, Unvegetated C2-S4, Unvegetated C2-S5, Unvegetated C3-S1, Unvegetated C3-S2, Unvegetated C3-S3, Unvegetated C3-S4, Unvegetated C3-S5, Unvegetated S1, 6+ Wk Vegetated S2, 6+ Wk Vegetated S3, 6+ Wk Vegetated S4, 6+ Wk Vegetated S1, 1+ Yr Vegetated S2, 1+ Yr Vegetated S3, 1+ Yr Vegetated S4, 1+ Yr Vegetated S5, 1+ Yr Vegetated Table 4. ECP-3, Triple Net Polymer Fiber Matting & 4.5 staples/sy Product Unvegetated 6+ Week Vegetated 1+ Year Vegetated Condition Condition Condition Actual growth period, wks τ limit * 12.3* V limit * 25.0* * = ASTM D 6460 requires that three test replicates be performed using identical procedures to obtain an average threshold of performance. Thus, the results of vegetated testing, being single replicates of each condition, cannot be considered as an average threshold of performance.

8 Cummulative Soil Loss (CSLI), in Cummulative Soil Loss (CSLI), in y = x x R² = Limiting Shear via ASTM D 6460 ECP-3; 4.5 Anchors/SY y = x x R² = ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 8 Unvegetated Run #1 Unvegetated Run #2 Unvegetated Run #3 All Unvegetated Runs With 7 Weeks of Vegetation With 62 Weeks of Vegetation Poly. (All Unvegetated Runs) Poly. (With 7 Weeks of Vegetation) Poly. (With 62 Weeks of Vegetation) 1 Limiting Shear = 3.3 psf Limiting Shear = 6.4 psf y = x x x R² = Limiting Shear = 12.3 psf Shear, psf Figure 13. Shear Stress vs. Soil Loss Tested Product y = x R² = Limiting Velocity via ASTM D 6460 ECP-3; 4.5 Anchors/SY Unvegetated Run #1 Unvegetated Run #2 Unvegetated Run #3 All Runs With 7 Weeks of Vegetation With 62 Weeks of Vegetation Power (All Runs) Poly. (With 7 Weeks of Vegetation) Poly. (With 62 Weeks of Vegetation) 1 Limiting Velocity = 12.1 ft/sec y = 8E-05x x x R² = 1 Limiting Velocity = 17.5 ft/sec y = 6E-05x x x R² = Limiting Velocity = 25 ft/sec Velocity, ft/sec Figure 14. Velocity vs. Soil Loss Tested Product

9 Manning's n Permissible Shear, psf Vegetation Loss vs Time of Vegetation Growth via ASTM D 6460 ECP-3; 4.5 Anchors/SY SUMMARY OF TEST RESULTS ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 9 Weeks of Vegetation Growth Initial Vegetative Density (stems/ft 2 ) Final Vegetative Density (stems/ft 2 ) % of Initial Vegetation after Max. Shear (%) 0 33% 6% Permissible Shear Time of Vegetation Growth, weeks Figure 15. Shear Stress vs. Time of Vegetation Growth Tested Product Manning's n vs. Water Depth ECP-3; 4.5 Anchors/SY Unvegetated Run #1 Unvegetated Run #2 Unvegetated Run #3 Al Unvegetated Runsl With 7 Weeks of Vegetation With 62 Weeks of Vegetation Power (Al Unvegetated Runsl) y = x R² = Water Depth, in Figure 16. Flow Depth vs. Manning s n Tested Product

10 Elevation Relative to Benchmark, ft Elevation Relative to Benchmark, ft ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page Energy Grade Lines - All Shear Levels ECP-3 Unvegetated Channel 1 Channel 2 Channel Shear Level y = x y = x y = x Shear Level y = x y = -0.09x y = x Shear Level y = x y = x y = x Shear Level y = x y = x y = x Shear Level y = x y = x y = x X-Section (ft along test reach) Figure 17a. Energy Grade Lines All Channels, Unvegetated Shears Tested Product Shear Level 5 Shear Level 4 Shear Level 3 Shear Level 2 Shear Level 1 7-Wk Vegetated Energy Grade Lines - All Shear Levels ECP-3 Vegetated Channels 62-Wk Vegetated y = x y = x y = x y = x y = x y = x y = x y = x y = x X-Section (ft along test reach) Figure 17b. Energy Grade Lines All Channels, Vegetated Shears Tested Product

11 Cummulative Soil Loss (CSLI), in Percent of Initial Vegetation after Shear Stress, % Vegetation Loss vs Shear via ASTM D 6460 ECP-3; 4.5 Anchors/SY ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page % With 7 Weeks of Vegetation With 62 Weeks of Vegetation Poly. (With 7 Weeks of Vegetation) Poly. (With 62 Weeks of Vegetation) 90.0% 80.0% 70.0% Initial 7-Week Vegetative Stand = 273 stems/ft 2 y = x x x + 1 R² = % 50.0% 40.0% 30.0% 20.0% 10.0% Initial 62-week Vegetative Stand = 481 stems/ft 2 y = 1E-04x x x + 1 R² = % Shear, psf Figure 18. Vegetation vs. Shear Stress Tested Product y = x x x R² = Limiting Shear via ASTM D 6460 Control Runs Unvegetated With 6 Weeks of Vegetation With 61 Weeks of Vegetation Poly. (Unvegetated) Power (With 6 Weeks of Vegetation) Poly. (With 61 Weeks of Vegetation) Limiting Shear = y = x R² = Limiting Shear = 0.5 psf y = x x x R² = Limiting Shear = 8.0 psf Shear, psf Figure 19. Shear Stress vs. Soil Loss Controls (Vegetation Only / No RECP)

12 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Page 12 Figure 20. Typical 6+ Week Control Vegetation-Only Before Testing Figure 22. Typical 1+ Year Control Vegetation-Only Before Testing Figure 21. Typical 6+ Week Control Vegetation-Only After Testing 5 Figure 23. Typical 1+ Year Control Vegetation-Only After Testing CONCLUSIONS Rectangular channel (flume) tests were performed in accordance with ASTM D 6460 using Loam soil protected with an RECP. Three replicates of the unvegetated condition and one replicate each of the 6+ week and 1+ year vegetated conditions were performed. Testing in a rectangular (vertical wall) channel was conducted to achieve increasing shear levels in an attempt to cause at least 0.5-inch of soil loss. Figure 13 shows the maximum bottom shear stress and associated soil loss from each flow event. Figure 14 presents the velocity versus soil loss. Figure 15 relates the permissible shear stress to the length of time the vegetation had been allowed to grow. Figure 16 relates channel liner roughness (Manning s n ) to flow depth. Together, this data describes the relevant performance characteristics of the tested RECP. It is important to note that ASTM D 6460, the procedure used to guide the testing reported herein, requires that three test replicates be performed using identical procedures to obtain an average threshold of performance. Thus, the results of the testing of vegetated channels reported herein, being single replicates of each condition, cannot be considered as an average threshold of performance. The data in Figures 17a, 17b, 18 and 19, the calculated energy grade lines for each channel and shear level, the retained vegetation at each shear level, and the control condition shear stress vs. soil loss relationships, are included to provide a reference for the reported test results.

13 ECP-3, Triple Net Polymer Fiber Matting, over Loam Channel Erosion Testing December 12, 2011 Appendix APPENDIX A RECORDED DATA Test Record Sheets (Note: Unvegetated Test Record Sheets are in a Separate Report)

14 2-1 CHANNEL 2 - SHEAR STRESS 1 Date: 9/29/10 Start Time: 11:30 AM End Time: 12:30 PM Soil: Loam Target Shear (psf): 2.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA Outlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 2 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 2.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 4.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 4.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft 25.5Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 4.2 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 4.1 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 3.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 3.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 3.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in -0.1 Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 3.4 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in -0.1 Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 3.3 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 3.5 Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in 0.0 Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = 0.0 Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.1

15 2-2 CHANNEL 2 - SHEAR STRESS 2 Date: 9.29/10 Start Time: 12:45 PM End Time: 1:45 PM Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: 1500 rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 4 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.1 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 7.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 8.1 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 7.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 7.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.7 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.3 Avg Clopper Soil Loss, in -0.3 Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.2 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.6 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.8 Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in 0.0 Avg Clopper Soil Loss, in 0.0 Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = -0.1 Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.1

16 2-3 CHANNEL 2 - SHEAR STRESS 3 Date: 9/29/10 Start Time: 3:00 PM End Time: 4:00 PM Soil: Loam Target Shear (psf): 8.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 2 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.2 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.2 Avg Clopper Soil Loss, in -0.1 Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.3 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.1 Avg Clopper Soil Loss, in -0.1 Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.7 Soil Loss / Gain, cm navg = 0.0 Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 12.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.4 Avg Clopper Soil Loss, in -0.4 Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 13.1 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.3 Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 13.2 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.6 Avg Clopper Soil Loss, in -0.6 Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 13.2 Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in -0.4 Avg Clopper Soil Loss, in -0.4 Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = -0.2 Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.3

17 2-4 CHANNEL 2 - SHEAR STRESS 4 Date: 10/1/10 Start Time: 2:00 PM End Time: 3:00 PM Soil: Loam Target Shear (psf): Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 2 C = 0.00 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 16.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.4 Avg Clopper Soil Loss, in -0.4 Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.1 Avg Clopper Soil Loss, in -0.2 Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.4 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.3 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.3 Avg Clopper Soil Loss, in -0.3 Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.2 Avg Clopper Soil Loss, in -0.2 Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.5 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.5 Avg Clopper Soil Loss, in -0.5 Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 18.0 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.8 Avg Clopper Soil Loss, in -0.8 Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.8 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -0.7 Avg Clopper Soil Loss, in -0.7 Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.9 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in -1.1 Avg Clopper Soil Loss, in -1.1 Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 17.8 Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in -1.1 Avg Clopper Soil Loss, in -1.1 Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = -0.5 Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.5

18 3-1 CHANNEL 3 - SHEAR STRESS 1 Date: 10/18/11 Start Time: 10:00 AM End Time: 11:00 AM Soil: Loam Target Shear (psf): 2.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA Outlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 2 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 4.73 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 4.81 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 5.06 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft 25.5Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 5.68 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 5.30 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 5.64 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.01 Avg Clopper Soil Loss, in Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.08 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in 0.08 Avg Clopper Soil Loss, in 0.00 Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 5.85 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 5.90 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.43 Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = 6.48 Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.05

19 3-2 CHANNEL 3 - SHEAR STRESS 2 Date: 10/18/11 Start Time: 11:45 AM End Time: 12:45 PM Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: 1500 rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.13

20 3-3 CHANNEL 3 - SHEAR STRESS 3 Date: 10/18/11 Start Time: 2:00 PM End Time: Soil: Loam Target Shear (psf): 3.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 4 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.26

21 3-4 CHANNEL 3 - SHEAR STRESS 4 Date: 10/18/11 Start Time: 4:00 PM End Time: Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 2.00 C = 0.00 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = pins / sy Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.38

22 3-5 CHANNEL 3 - SHEAR STRESS 5 Date: 11/8/11 Start Time: 4:00 PM End Time: Soil: Loam Target Shear (psf): 4.00 Slope: 20% 40 ft long flume 20 ft test section RECP: ECP-3 Anchorage: 1900 rpms 2 ft wide flume TEST DATA Inlet Weir Weir Channel Targets FLOW Water Depth, in Weir width (ft) = 2.00 C = 0.00 Water Velocity, ft/s ft A B C Flow Rate, cfs Cross-section 1 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 2 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 3 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 4 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 5 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 6 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 7 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 8 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 9 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 10 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = Clopper Soil Loss, cm Flow (cfs) = ft Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Cross-section 11 A B C 0.2d 0.6d 0.8d To Water Surf, cm To original Surface Elev, cm To eroded Surface Elev, cm Vavg (fps) = Soil Loss / Gain, cm navg = pins / sy Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Stress (psf) Clopper Soil Loss, cm Flow (cfs) = Avg Bottom Loss/Gain, in Avg Clopper Soil Loss, in Soil Loss / Gain, in Avg Bottom Loss/Gain per Cross-Section = Clopper Soil Loss, in Avg Clopper Soil Loss per Cross-Section = -0.54

23 Sample Period & Date (Plots Started: 8/18/10) Channel Product Vegetation Count 6-Week Vegetated ECP-3 Zone # Stems Stems/ft 2 Blades* # Ht. Avg., in. Sample Vegetation Count Period & Channel 1-Year Vegetated Date (Plots Product ECP3 % of Started: # Initial 9/14/10) Zone # Stems Stems / ft 2 Blades* Ht. Avg., in. % of Initial Initial - 9/29/10 After Shear #1-9/29/10 After Shear #2-9/29/10 After Shear #3-9/29/10 After Shear #4-10/1/10 After Shear #5-0/0/ Initial /18/ Avg % Avg % After Shear # /18/ Avg % Avg % After Shear # /18/ Avg % Avg % After Shear # /18/ Avg % Avg % After Shear # /18/ Avg % Avg % After Shear # /8/ Avg 0 0 #DIV/0! #DIV/0! 0.0% Avg % Sample Area: 3" x 3" = ft 2 Sample Area: 3" x 3" = ft 2