terratame2 flow testing - invisiblestructures.com · during the testing, flow depth and...
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Product Statement
As of May 2014, GP-Flex by Tenex has been exclusively branded and sold as Terratame2 by Invisible Structures.
All references to GP-Flex herein shall be considered a reference to and of Terratame2.
Unvegetated Large-Scale Channel Erosion Testing (ASTM D 6460)
of
Tenax Corporation’s GPFlex, Turf Reinforcement Mat
over Loam
FINAL REPORT March 2016
Submitted to: Tenax Corporation
4800 E. Monument Street Baltimore, MD 21205
Attn: Dave Zill,
Industrial Business Unit Mgr E-mail: [email protected]
Submitted by:
TRI/Environmental, Inc. 9063 Bee Caves Road
Austin, TX 78733
C. Joel Sprague
Project Manager
March 31, 2016 Mr. Dave Zill Tenax Corporation 4800 E. Monument Street Baltimore, MD 21205 E-mail: [email protected] Subject: Channel Testing over Loam of GP FLEX, Turf Reinforcement Mat Dear Mr. Zill: This report presents the results for large-scale channel erosion tests performed on GP FLEX, Turf Reinforcement Mat, over Loam. Included are data developed for target hydraulic shears ranging from 0.5 to 3+ psf (30 minute flow durations) for the unvegetated condition. A failure criteria of 0.5-inch average soil loss was used. 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. Generated results were used to develop the following permissible or limiting shear (τlimit) and limiting velocity (Vlimit) for the tested material:
Product Limiting Shear, τlimit Limiting Velocity, Vlimit GP Flex, Turf Reinforcement Mat
& 3.8 anchor pins/sy 4.62 psf 14.8 ft/sec
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: Jay Sprague – TRI
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 3
CHANNEL TESTING REPORT
GP FLEX, Turf Reinforcement Mat, 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. The large-scale testing is performed in a rectangular flume having a 10% slope 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 each to achieve a range of hydraulic shear stresses in order to define the permissible, or limiting, shear stress, τlimit, 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. 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 - GP FLEX Manufacturer - Tenax Corp.
Manufacturing Plant Location - n/a Lot number of sample - n/a
Fiber - 100% Synthetic Extruded Mesh TRM
Netting Openings in (1) Stitching Spacing in (1)
Tensile Strength MD x XD (ASTM D 6818)* lb/in 46.0 x 57.2 Tensile Elongation MD x XD (ASTM D 6818)* % 31.4 x 31.3
Thickness (ASTM D 6525)* mils 582 Light Penetration (ASTM D 6567)* % cover 66.7
Density – Net Only (ASTM D 792, Method A)* g/cm3 1.0± (2 polymers) Mass / Unit Area (ASTM D 6475)* oz/sy 48.1
* Values from Independent Testing of Randomly Sampled Product; n/a = not available; 1. No nettings or stitching in product.
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 4
Test Soil The test soil used in the test plots had the following characteristics.
Table 2. TRI-Loam Characteristics
Soil Characteristic Test Method Value
% Gravel
ASTM D 422
0 % Sand 45 % Silt 35 % Clay 20
Liquid Limit, % ASTM D 4318 32 Plasticity Index, % 8 Soil Classification USDA Loam Soil Classification USCS Clayey Sand (SC)
Preparation of the Test Channels Compaction is verified to be 90% (± 3%) of Proctor Standard density using ASTM D 2937 (drive-cylinder 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. 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 12-inch anchor pins to create an anchorage density of approximately 3.8 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 cumulative 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.
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 5
Figure 1. Flumes Setup (typical)
Figure 2. Flow Velocity Measurement in
Channel (typical)
Figure 3. Channel Flow Depth
Measurement (typical)
Figure 4. TRM Installed (typical)
Figure 5. Typical Low Flow in Channels
Figure 6. Typical Low to Medium
Flow in Channel
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 6
Figure 7. Typical Medium Flow in Channel
Figure 8. Typical High Flow in Channel
Figure 9. Ending Condition
Figure 10. Channel 1 After RECP Removed
Figure 11. Channel 2 After RECP Removed
Figure 12. Channel 3 After RECP Removed
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 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). A graph of shear versus soil loss for the protected condition is shown in Figure 13. The associated velocities and roughness 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, τlimit,, and limiting velocity, Vlimit,. Linear (R2=0.53), power (R2=0.84), and polynomial (R2=0.94) fits were evaluated.
Table 3. Summary Data Table – Protected Test Reach Test #
(Channel # - Shear Level)
Flow depth (in)
Flow velocity
(fps)
Flow (cfs)
Manning’s roughness, n
Max Bed Shear
Stress (psf)
Cumm. CSLI (in)
C1-S1 1.47 2.43 0.59 0.048 0.77 0.02 C1-S2 2.86 6.40 3.05 0.028 1.48 0.05 C1-S3 4.56 9.61 7.31 0.026 2.27 0.11 C1-S4 6.43 11.31 12.11 0.026 3.21 0.18 C1-S5 9.34 14.33 22.31 0.025 4.62 0.40 C2-S1 1.49 2.50 0.62 0.047 0.77 0.01 C2-S2 2.71 7.20 3.26 0.025 1.34 0.05 C2-S3 4.48 9.90 7.39 0.024 2.24 0.08 C2-S4 6.29 11.94 12.51 0.025 3.01 0.13 C2-S5 8.81 13.91 20.42 0.025 4.26 0.49 C3-S1 1.69 2.65 0.75 0.048 0.88 0.01 C3-S2 2.98 6.95 3.46 0.026 1.48 0.04 C3-S3 4.95 10.12 8.35 0.024 2.41 0.10 C3-S4 6.89 13.09 15.03 0.024 3.35 0.19 C3-S5 9.73 14.81 24.02 0.024 4.60 0.51
Using the test procedure and data evaluation technique described herein, the limiting shear stress shown in Table 4 was determined using the following equation:
τ0 = γ/2(y1 + y2)sinΘB + 1/L[γ/2(y12 - y2
2)cosΘB – ρq2(1/y2 – 1/y1)] Where: τ0 = shear stress (Pa), γ = unit weight of water (N/m3), y1 = upstream flow depth* (m), y2 = downstream flow depth* (m),
ΘB = angle of bed slope (degrees), ρ = density of water (kg/m), q = unit discharge (cms/m), and L = length of control volume (m).
*Flow depths measured near the end of the 30 minute test period are used in the calculations.
Table 4. Overall Results
Product Limiting Shear, τlimit Limiting Velocity, Vlimit GP Flex, Turf Reinforcement Mat
& 3.8 anchor pins/sy 4.62 psf 14.8 ft/sec
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 8
y = 0.0039x3 + 0.003x2 + 0.0052x + 0.0139R² = 0.9477
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0 1 2 3 4 5
Cum
mul
ativ
e S
oil L
oss
(CS
LI),
in
Shear, psf
Limiting Shear via ASTM D 6460 GPFlex + Double Net Straw Blanket; 3.8 Anchors/SY
Channel # 1 Channel # 2 Channel # 3 All Channels Poly. (All Channels)
Limiting Shear = 4.62 psf
Figure 13. Shear Stress vs. Soil Loss – Tested Product
y = 0.0005x3 - 0.0068x2 + 0.0286xR² = 0.9213
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0 2 4 6 8 10 12 14 16
Cum
mul
ativ
e S
oil L
oss
(CS
LI),
in
Velocity, ft/sec
Limiting Velocity via ASTM D 6460GPFlex + Double Net Straw Blanket; 3.8 Anchors/SY
Channel # 1 Channel # 2 Channel # 3 All Channels Poly. (All Channels)
Limiting Velocity= 14.8 ft/sec
Figure 14. Velocity vs. Soil Loss – Tested Product
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 9
y = 0.046x-0.337
R² = 0.6721
0.010
0.015
0.020
0.025
0.030
0.035
0.040
0.045
0.050
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00
Man
ning
's n
Water Depth, in
Manning's n vs. Water DepthGPFlex + Double Net Straw Blanket; 3.8 Anchors/SY
Channel # 1 Channel # 2 Channel # 3 All Channels Power (All Channels)
Figure 15. Flow Depth vs. Manning’s “n” – Tested Product
y = -0.1002x + 196.85 y = -0.1016x + 196.9 y = -0.0991x + 196.89
y = -0.0971x + 197.48 y = -0.1025x + 197.72 y = -0.0968x + 197.61
y = -0.1002x + 198.44 y = -0.0972x + 198.53 y = -0.0865x + 198.51
y = -0.0878x + 199.02 y = -0.0917x + 199.31 y = -0.0898x + 199.77
y = -0.084x + 199.53 y = -0.0784x + 199.88 y = -0.0779x + 200.6
190
191
192
193
194
195
196
197
198
199
200
201
0 2 4 6 8 10 12 14 16 18 20
Ele
vatio
n R
elat
ive
to B
ench
mar
k, ft
X-Section (ft along test reach)
Energy Grade Lines - All Shear LevelsGPFlex + Double Net Straw Blanket; 3.8 Anchors/SY
Shear Level 4
Shear Level 3
Shear Level 2
Shear Level 1
Shear Level 5
Channel 1 Channel 2 Channel 3
Figure 16. Energy Grade Lines – All Channels, All Shears – Tested Product
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Page 10
Figure 17. Shear Stress vs. Soil Loss – Soil Only
CONCLUSIONS Rectangular channel (flume) tests were performed in accordance with ASTM D 6460 using Loam soil protected with an RECP. 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 channel liner roughness (Manning’s “n”) to flow depth. Together, this data provides a quantitative estimate of the performance characteristics of the tested RECP. The data in Figure 16 and 17, the calculated energy grade lines for each channel and shear level and the soil-only shear stress vs. soil loss relationship, are included to provide a reference for the reported test results.
y = 16.269x2 + 5.4657x R² = 0.9953
0.00
0.10
0.20
0.30
0.40
0.50
0.60
0.70
0.80
0.90
1.00
0.00 0.05 0.10 0.15 0.20 0.25
Cum
mul
ativ
e S
oil L
oss
(CS
LI),
in
Shear, psf
Limiting Shear via ASTM D 6460 Soil-only Control Test
Control Test - 1% Flume Poly. (Control Test - 1% Flume)
Limiting Shear = 0.075 psf
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Appendix
APPENDIX A – RECORDED DATA
Test Record Sheets
Date: 3/11/16 RECP: Lot #:
Slope: 10% Start Time: 9:14 AM Channel # Shear # Start Time: 10:08 AM Channel # Shear # Start Time: 11:03 AM Channel # Shear # Start Time: 1:18 PM Channel # Shear # Start Time: 2:17 PM Channel # Shear #
Width: 2 End Time: 9:44 AM 1 1 End Time: 10:38 AM 1 2 End Time: 11:33 AM 1 3 End Time: 1:38 PM 1 4 End Time: 2:47 PM 1 5
#DIV/0! #DIV/0! #DIV/0! #DIV/0! #DIV/0!
To original Surface Elev, cm 71.6 72.0 72.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 71.6 72.0 72.0 71.9 71.7 72.0 72.0 71.9 71.9 72.0 72.0 72.0 72.0 72.0 72.1 72.0 72.5 72.8 73.0 72.8
Loss/Gain, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 0.00 0.00 -0.01 -0.12 0.00 0.00 -0.04 -0.16 0.00 -0.04 -0.07 -0.35 -0.31 -0.39 -0.30
CSLI, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 0.00 0.00 -0.01 -0.12 0.00 0.00 -0.04 -0.16 0.00 -0.04 -0.07 -0.35 -0.31 -0.39 -0.30
Velocity, ft/s 2.3 2.3 6.2 6.2 9.5 9.5 10.9 10.9 13.6 13.6
Distance to Water Surface, cm 68.2 68.2 64.5 64.5 60.0 60.0 55.5 55.5 48.8 48.8
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.55 1.44 3.01 2.91 7.46 4.71 11.83 6.51 21.39 9.44
To original Surface Elev, cm 70.4 70.7 70.8 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.4 70.7 70.8 70.6 70.5 70.7 70.8 70.7 70.6 70.7 71.0 70.8 71.2 70.9 71.0 71.0 72.0 71.5 71.8 71.8
Loss/Gain, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 0.00 0.00 -0.01 -0.08 0.00 -0.08 -0.05 -0.31 -0.08 -0.08 -0.14 -0.63 -0.31 -0.39 -0.39
CSLI, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 0.00 0.00 -0.01 -0.08 0.00 -0.08 -0.05 -0.31 -0.08 -0.08 -0.14 -0.63 -0.31 -0.39 -0.39
Velocity, ft/s 2.3 2.3 6.2 6.2 9.5 9.5 11.0 11.0 13.7 13.7
Distance to Water Surface, cm 66.9 66.9 63.3 63.3 59.0 59.0 54.5 54.5 47.6 47.6
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.56 1.47 3.00 2.90 7.33 4.63 11.93 6.51 21.72 9.51
To original Surface Elev, cm 70.5 71.0 71.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.5 71.0 71.0 70.8 70.6 71.1 71.0 70.9 70.6 71.1 71.1 70.9 70.8 71.1 71.1 71.0 71.4 71.6 72.0 71.7
Loss/Gain, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 -0.04 0.00 -0.02 -0.04 -0.04 -0.04 -0.03 -0.12 -0.04 -0.04 -0.06 -0.35 -0.24 -0.39 -0.29
CSLI, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 -0.04 0.00 -0.02 -0.04 -0.04 -0.04 -0.03 -0.12 -0.04 -0.04 -0.06 -0.35 -0.24 -0.39 -0.29
Velocity, ft/s 2.3 2.3 6.3 6.3 9.6 9.6 11.0 11.0 14.2 14.2
Distance to Water Surface, cm 66.9 66.9 63.6 63.6 59.0 59.0 54.4 54.4 47.8 47.8
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.59 1.55 3.02 2.87 7.52 4.70 11.98 6.54 22.24 9.40
To original Surface Elev, cm 69.6 70.0 69.8 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.6 70.0 69.8 69.8 69.8 70.0 70.0 69.9 69.9 70.0 70.0 70.0 70.0 70.1 70.2 70.1 70.6 71.0 70.8 70.8
Loss/Gain, sq.in./in. width 0.00 0.00 0.00 0.00 -0.08 0.00 -0.08 -0.05 -0.12 0.00 -0.08 -0.07 -0.16 -0.04 -0.16 -0.11 -0.39 -0.39 -0.39 -0.33
CSLI, sq.in./in. width 0.00 0.00 0.00 0.00 -0.08 0.00 -0.08 -0.05 -0.12 0.00 -0.08 -0.07 -0.16 -0.04 -0.16 -0.11 -0.39 -0.39 -0.39 -0.33
Velocity, ft/s 2.4 2.4 6.3 6.3 9.6 9.6 11.1 11.1 14.3 14.3
Distance to Water Surface, cm 66.0 66.0 62.7 62.7 58.0 58.0 53.7 53.7 47.1 47.1
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.60 1.50 2.99 2.85 7.54 4.71 11.94 6.46 22.24 9.33
To original Surface Elev, cm 69.0 69.3 69.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.1 69.3 69.1 69.2 69.2 69.4 69.1 69.2 69.4 69.5 69.5 69.5 69.5 69.5 69.8 69.6 70.5 70.4 70.8 70.6
Loss/Gain, sq.in./in. width -0.04 0.00 -0.04 -0.03 -0.08 -0.04 -0.04 -0.05 -0.16 -0.08 -0.20 -0.13 -0.20 -0.08 -0.31 -0.18 -0.59 -0.43 -0.71 -0.51
CSLI, sq.in./in. width -0.04 0.00 -0.04 -0.03 -0.08 -0.04 -0.04 -0.05 -0.16 -0.08 -0.20 -0.13 -0.20 -0.08 -0.31 -0.18 -0.59 -0.43 -0.71 -0.51
Velocity, ft/s 2.5 2.5 6.4 6.4 9.7 9.7 11.2 11.2 14.3 14.3
Distance to Water Surface, cm 65.3 65.3 62.0 62.0 57.8 57.8 53.2 53.2 46.8 46.8
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.63 1.52 3.04 2.85 7.43 4.59 12.05 6.46 22.30 9.36
To original Surface Elev, cm 68.9 69.4 69.3 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 68.9 69.4 69.3 69.2 69.0 69.4 69.3 69.2 69.1 69.6 69.4 69.4 69.4 69.6 69.4 69.5 69.9 69.8 69.8 69.8
Loss/Gain, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 0.00 0.00 -0.01 -0.08 -0.08 -0.04 -0.05 -0.20 -0.08 -0.04 -0.09 -0.39 -0.16 -0.20 -0.22
CSLI, sq.in./in. width 0.00 0.00 0.00 0.00 -0.04 0.00 0.00 -0.01 -0.08 -0.08 -0.04 -0.05 -0.20 -0.08 -0.04 -0.09 -0.39 -0.16 -0.20 -0.22
Velocity, ft/s 2.5 2.5 6.4 6.4 9.6 9.6 11.3 11.3 14.4 14.4
Distance to Water Surface, cm 65.5 65.5 62.0 62.0 58.0 58.0 53.3 53.3 46.3 46.3
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.61 1.46 3.04 2.85 7.16 4.48 11.99 6.36 22.24 9.27
To original Surface Elev, cm 69.0 69.3 69.3 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.0 69.3 69.3 69.2 69.0 69.4 69.5 69.3 69.2 69.5 69.6 69.4 69.3 69.6 69.6 69.5 69.8 69.8 69.9 69.8
Loss/Gain, sq.in./in. width 0.00 0.00 0.00 0.00 0.00 -0.04 -0.08 -0.03 -0.08 -0.08 -0.12 -0.08 -0.12 -0.12 -0.12 -0.10 -0.31 -0.20 -0.24 -0.22
CSLI, sq.in./in. width 0.00 0.00 0.00 0.00 0.00 -0.04 -0.08 -0.03 -0.08 -0.08 -0.12 -0.08 -0.12 -0.12 -0.12 -0.10 -0.31 -0.20 -0.24 -0.22
Velocity, ft/s 2.4 2.4 6.4 6.4 9.6 9.6 11.5 11.5 14.5 14.5
Distance to Water Surface, cm 65.5 65.5 62.0 62.0 58.0 58.0 53.3 53.3 46.3 46.3
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.58 1.46 3.07 2.87 7.20 4.50 12.22 6.38 22.39 9.27
To original Surface Elev, cm 69.7 69.8 69.6 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.7 69.9 70.0 69.9 69.8 70.0 70.0 69.9 69.8 70.0 70.3 70.0 70.1 70.1 70.5 70.2 70.7 70.8 71.0 70.8
Loss/Gain, sq.in./in. width 0.00 -0.04 -0.16 -0.06 -0.04 -0.08 -0.16 -0.08 -0.04 -0.08 -0.28 -0.12 -0.16 -0.12 -0.35 -0.19 -0.39 -0.39 -0.55 -0.38
CSLI, sq.in./in. width 0.00 -0.04 -0.16 -0.06 -0.04 -0.08 -0.16 -0.08 -0.04 -0.08 -0.28 -0.12 -0.16 -0.12 -0.35 -0.19 -0.39 -0.39 -0.55 -0.38
Velocity, ft/s 2.5 2.5 6.5 6.5 9.6 9.6 11.5 11.5 14.5 14.5
Distance to Water Surface, cm 66.2 66.2 62.6 62.6 58.8 58.8 54.0 54.0 47.2 47.2
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.60 1.44 3.13 2.89 7.08 4.42 12.25 6.39 22.49 9.30
To original Surface Elev, cm 69.7 70.0 70.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.7 70.1 70.1 70.0 69.7 70.5 70.3 70.2 69.9 71.0 70.7 70.5 70.1 71.0 71.4 70.8 71.2 71.8 72.0 71.7
Loss/Gain, sq.in./in. width 0.00 -0.04 -0.04 -0.02 0.00 -0.20 -0.12 -0.07 -0.08 -0.39 -0.28 -0.18 -0.16 -0.39 -0.55 -0.30 -0.59 -0.71 -0.79 -0.58
CSLI, sq.in./in. width 0.00 -0.04 -0.04 -0.02 0.00 -0.20 -0.12 -0.07 -0.08 -0.39 -0.28 -0.18 -0.16 -0.39 -0.55 -0.30 -0.59 -0.71 -0.79 -0.58
Velocity, ft/s 2.5 2.5 6.5 6.5 9.6 9.6 11.6 11.6 14.7 14.7
Distance to Water Surface, cm 66.3 66.3 63.0 63.0 59.2 59.2 54.5 54.5 47.9 47.9
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.60 1.44 3.06 2.82 7.14 4.46 12.43 6.43 22.92 9.36
To original Surface Elev, cm 70.6 71.0 70.3 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.6 71.0 71.0 70.9 70.7 71.3 71.1 71.0 71.0 71.4 71.8 71.4 71.2 71.4 72.5 71.7 72.1 72.5 72.8 72.5
Loss/Gain, sq.in./in. width 0.00 0.00 -0.28 -0.09 -0.04 -0.12 -0.31 -0.14 -0.16 -0.16 -0.59 -0.28 -0.24 -0.16 -0.87 -0.39 -0.59 -0.59 -0.98 -0.62
CSLI, sq.in./in. width 0.00 0.00 -0.28 -0.09 -0.04 -0.12 -0.31 -0.14 -0.16 -0.16 -0.59 -0.28 -0.24 -0.16 -0.87 -0.39 -0.59 -0.59 -0.98 -0.62
Velocity, ft/s 2.5 2.5 6.6 6.6 9.7 9.7 11.6 11.6 14.7 14.7
Distance to Water Surface, cm 67.0 67.0 63.8 63.8 60.0 60.0 55.6 55.6 48.9 48.9
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.63 1.52 3.13 2.85 7.26 4.49 12.25 6.34 22.73 9.28
To original Surface Elev, cm 70.1 70.6 70.5 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.1 70.8 70.6 70.5 70.3 70.8 70.9 70.7 70.5 70.9 71.0 70.8 71.0 71.5 71.5 71.3 72.0 72.4 72.8 72.4
Loss/Gain, sq.in./in. width 0.00 -0.08 -0.04 -0.03 -0.08 -0.08 -0.16 -0.09 -0.16 -0.12 -0.20 -0.14 -0.35 -0.35 -0.39 -0.31 -0.75 -0.71 -0.91 -0.67
CSLI, sq.in./in. width 0.00 -0.08 -0.04 -0.03 -0.08 -0.08 -0.16 -0.09 -0.16 -0.12 -0.20 -0.14 -0.35 -0.35 -0.39 -0.31 -0.75 -0.71 -0.91 -0.67
Velocity, ft/s 2.5 2.5 6.6 6.6 9.7 9.7 11.7 11.7 14.8 14.8
Distance to Water Surface, cm 67.0 67.0 63.5 63.5 59.4 59.4 55.3 55.3 49.0 49.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.57 1.38 3.10 2.82 7.26 4.49 12.31 6.31 22.72 9.21Calculations
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Cross-Section Measurements Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs:
GP Flex w/ Double Net Straw Blanket Anchorage: 3.8/ Sq. Yd.
Date: 3/11/16 RECP: Lot #:
Slope: 10% Start Time: 9:14 AM Channel # Shear # Start Time: 10:08 AM Channel # Shear # Start Time: 11:03 AM Channel # Shear # Start Time: 1:18 PM Channel # Shear # Start Time: 3:01 PM Channel # Shear #
Width: 2 End Time: 9:44 AM 2 1 End Time: 10:38 AM 2 2 End Time: 11:33 AM 2 3 End Time: 1:48 PM 2 4 End Time: 3:31 PM 2 5
1.35 1.35 1.35 1.35 1.35
To original Surface Elev, cm 70.7 71.2 71.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.7 71.2 71.0 71.0 70.8 71.3 71.0 71.0 70.8 71.4 71.3 71.2 70.8 71.4 71.6 71.3 72.0 72.5 72.4 72.3
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 -0.04 -0.04 0.00 -0.02 -0.04 -0.08 -0.12 -0.07 -0.04 -0.08 -0.24 -0.10 -0.51 -0.51 -0.55 -0.44
CSLI, in 0.00 0.00 0.00 0.00 -0.04 -0.04 0.00 -0.02 -0.04 -0.08 -0.12 -0.07 -0.04 -0.08 -0.24 -0.10 -0.51 -0.51 -0.55 -0.44
Velocity, ft/s 2.6 2.6 7.8 7.8 9.8 9.8 11.6 11.6 13.5 13.5
Distance to Water Surface, cm 67.0 67.0 64.0 64.0 59.5 59.5 55.0 55.0 49.6 49.6
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.68 1.56 3.60 2.77 7.50 4.59 12.38 6.40 20.11 8.94
To original Surface Elev, cm 70.0 70.0 70.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.0 70.0 70.0 70.0 70.0 70.3 70.1 70.1 70.0 70.5 70.1 70.2 70.4 71.3 70.7 70.8 71.7 71.5 71.7 71.6
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 0.00 -0.12 -0.04 -0.03 0.00 -0.20 -0.04 -0.05 -0.16 -0.51 -0.28 -0.23 -0.67 -0.59 -0.67 -0.54
CSLI, in 0.00 0.00 0.00 0.00 0.00 -0.12 -0.04 -0.03 0.00 -0.20 -0.04 -0.05 -0.16 -0.51 -0.28 -0.23 -0.67 -0.59 -0.67 -0.54
Velocity, ft/s 2.5 2.5 7.4 7.4 9.8 9.8 11.7 11.7 13.6 13.6
Distance to Water Surface, cm 66.2 66.2 63.1 63.1 58.5 58.5 54.5 54.5 49.0 49.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.62 1.50 3.42 2.77 7.52 4.61 12.51 6.42 20.20 8.91
To original Surface Elev, cm 70.3 70.5 70.6 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.3 70.5 70.6 70.5 70.4 70.7 70.7 70.6 70.5 70.7 70.9 70.7 70.5 70.8 71.1 70.8 71.6 71.8 71.9 71.8
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 -0.04 -0.08 -0.04 -0.04 -0.08 -0.08 -0.12 -0.08 -0.08 -0.12 -0.20 -0.11 -0.51 -0.51 -0.51 -0.43
CSLI, in 0.00 0.00 0.00 0.00 -0.04 -0.08 -0.04 -0.04 -0.08 -0.08 -0.12 -0.08 -0.08 -0.12 -0.20 -0.11 -0.51 -0.51 -0.51 -0.43
Velocity, ft/s 2.7 2.7 6.8 6.8 9.8 9.8 11.8 11.8 13.7 13.7
Distance to Water Surface, cm 66.8 66.8 63.5 63.5 59.5 59.5 54.7 54.7 49.0 49.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.65 1.44 3.17 2.80 7.20 4.41 12.47 6.34 20.47 8.96
To original Surface Elev, cm 70.2 70.6 70.8 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.4 70.7 70.9 70.7 70.4 70.9 70.9 70.7 70.5 70.9 71.2 70.9 70.5 70.9 71.2 70.9 71.5 71.7 72.5 71.9
Soil Loss / Gain, in -0.08 -0.04 -0.04 -0.05 -0.08 -0.12 -0.04 -0.06 -0.12 -0.12 -0.16 -0.11 -0.12 -0.12 -0.16 -0.11 -0.51 -0.43 -0.67 -0.47
CSLI, in -0.08 -0.04 -0.04 -0.05 -0.08 -0.12 -0.04 -0.06 -0.12 -0.12 -0.16 -0.11 -0.12 -0.12 -0.16 -0.11 -0.51 -0.43 -0.67 -0.47
Velocity, ft/s 2.3 2.3 7.0 7.0 9.8 9.8 11.9 11.9 13.7 13.7
Distance to Water Surface, cm 67.0 67.0 63.6 63.6 59.5 59.5 54.8 54.8 49.3 49.3
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.55 1.44 3.28 2.81 7.31 4.48 12.55 6.33 20.32 8.90
To original Surface Elev, cm 69.1 69.5 69.5 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.1 69.5 69.5 69.4 69.4 69.6 69.5 69.5 69.4 69.6 69.6 69.5 69.5 69.6 69.8 69.6 70.0 71.0 71.1 70.7
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 -0.12 -0.04 0.00 -0.05 -0.12 -0.04 -0.04 -0.06 -0.16 -0.04 -0.12 -0.10 -0.35 -0.59 -0.63 -0.43
CSLI, in 0.00 0.00 0.00 0.00 -0.12 -0.04 0.00 -0.05 -0.12 -0.04 -0.04 -0.06 -0.16 -0.04 -0.12 -0.10 -0.35 -0.59 -0.63 -0.43
Velocity, ft/s 2.8 2.8 6.8 6.8 9.9 9.9 11.9 11.9 13.8 13.8
Distance to Water Surface, cm 65.4 65.4 62.5 62.5 58.2 58.2 53.7 53.7 48.3 48.3
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.73 1.56 3.12 2.76 7.36 4.46 12.44 6.27 20.28 8.82
To original Surface Elev, cm 70.2 70.5 70.6 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.2 70.6 70.6 70.5 70.3 70.7 70.7 70.6 70.3 71.0 71.0 70.8 70.8 71.2 71.0 71.0 71.4 72.0 72.6 72.0
Soil Loss / Gain, in 0.00 -0.04 0.00 -0.01 -0.04 -0.08 -0.04 -0.04 -0.04 -0.20 -0.16 -0.10 -0.24 -0.28 -0.16 -0.18 -0.47 -0.59 -0.79 -0.52
CSLI, in 0.00 -0.04 0.00 -0.01 -0.04 -0.08 -0.04 -0.04 -0.04 -0.20 -0.16 -0.10 -0.24 -0.28 -0.16 -0.18 -0.47 -0.59 -0.79 -0.52
Velocity, ft/s 2.3 2.3 7.4 7.4 10.0 10.0 12.0 12.0 13.9 13.9
Distance to Water Surface, cm 66.7 66.7 63.6 63.6 59.5 59.5 55.0 55.0 49.7 49.7
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.57 1.48 3.38 2.74 7.39 4.44 12.60 6.30 20.34 8.78
To original Surface Elev, cm 70.0 70.2 70.2 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.0 70.3 70.3 70.2 70.1 70.3 70.5 70.3 70.2 70.5 70.6 70.4 70.5 70.5 70.6 70.5 71.3 71.2 71.7 71.4
Soil Loss / Gain, in 0.00 -0.04 -0.04 -0.02 -0.04 -0.04 -0.12 -0.06 -0.08 -0.12 -0.16 -0.10 -0.20 -0.12 -0.16 -0.14 -0.51 -0.39 -0.59 -0.43
CSLI, in 0.00 -0.04 -0.04 -0.02 -0.04 -0.04 -0.12 -0.06 -0.08 -0.12 -0.16 -0.10 -0.20 -0.12 -0.16 -0.14 -0.51 -0.39 -0.59 -0.43
Velocity, ft/s 2.4 2.4 7.0 7.0 9.9 9.9 12.0 12.0 14.0 14.0
Distance to Water Surface, cm 66.3 66.3 63.3 63.3 59.2 59.2 54.5 54.5 49.1 49.1
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.61 1.54 3.22 2.76 7.30 4.42 12.62 6.31 20.49 8.78
To original Surface Elev, cm 69.5 70.1 70.2 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.5 70.1 70.2 69.9 69.5 70.1 70.3 70.0 69.5 70.2 70.4 70.0 69.5 70.2 70.4 70.0 70.6 71.0 71.8 71.1
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 0.00 0.00 -0.04 -0.01 0.00 -0.04 -0.08 -0.03 0.00 -0.04 -0.08 -0.03 -0.43 -0.35 -0.63 -0.41
CSLI, in 0.00 0.00 0.00 0.00 0.00 0.00 -0.04 -0.01 0.00 -0.04 -0.08 -0.03 0.00 -0.04 -0.08 -0.03 -0.43 -0.35 -0.63 -0.41
Velocity, ft/s 2.7 2.7 7.2 7.2 9.9 9.9 12.0 12.0 14.1 14.1
Distance to Water Surface, cm 66.4 66.4 63.5 63.5 58.5 58.5 54.2 54.2 49.0 49.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.63 1.39 3.06 2.55 7.49 4.54 12.47 6.23 20.48 8.71
To original Surface Elev, cm 69.6 70.0 69.9 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.6 70.0 69.9 69.8 69.9 70.1 70.0 70.0 70.0 70.1 70.1 70.1 70.0 70.1 70.1 70.1 71.0 71.1 71.8 71.3
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 -0.12 -0.04 -0.04 -0.06 -0.16 -0.04 -0.08 -0.09 -0.16 -0.04 -0.08 -0.09 -0.55 -0.43 -0.75 -0.51
CSLI, in 0.00 0.00 0.00 0.00 -0.12 -0.04 -0.04 -0.06 -0.16 -0.04 -0.08 -0.09 -0.16 -0.04 -0.08 -0.09 -0.55 -0.43 -0.75 -0.51
Velocity, ft/s 2.5 2.5 7.0 7.0 9.9 9.9 12.1 12.1 14.2 14.2
Distance to Water Surface, cm 66.0 66.0 63.3 63.3 58.5 58.5 54.0 54.0 49.3 49.3
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.63 1.51 3.08 2.64 7.51 4.55 12.76 6.33 20.50 8.66
To original Surface Elev, cm 69.9 70.3 70.2 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.9 70.4 70.3 70.2 70.2 70.6 70.5 70.4 70.2 70.7 70.5 70.5 70.4 70.8 70.5 70.6 71.7 71.5 72.0 71.7
Soil Loss / Gain, in 0.00 -0.04 -0.04 -0.02 -0.12 -0.12 -0.12 -0.10 -0.12 -0.16 -0.12 -0.10 -0.20 -0.20 -0.12 -0.14 -0.71 -0.47 -0.71 -0.55
CSLI, in 0.00 -0.04 -0.04 -0.02 -0.12 -0.12 -0.12 -0.10 -0.12 -0.16 -0.12 -0.10 -0.20 -0.20 -0.12 -0.14 -0.71 -0.47 -0.71 -0.55
Velocity, ft/s 2.6 2.6 7.4 7.4 10.0 10.0 12.1 12.1 14.2 14.2
Distance to Water Surface, cm 66.3 66.3 63.4 63.4 59.5 59.5 55.0 55.0 49.5 49.5
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.67 1.54 3.42 2.77 7.20 4.32 12.36 6.13 20.72 8.75
To original Surface Elev, cm 69.6 70.1 70.1 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.6 70.2 70.3 70.0 69.7 70.3 70.5 70.2 69.8 70.4 70.5 70.2 69.8 70.6 71.2 70.5 71.4 71.7 72.2 71.8
Soil Loss / Gain, in 0.00 -0.04 -0.08 -0.03 -0.04 -0.08 -0.16 -0.08 -0.08 -0.12 -0.16 -0.10 -0.08 -0.20 -0.43 -0.20 -0.71 -0.63 -0.83 -0.62
CSLI, in 0.00 -0.04 -0.08 -0.03 -0.04 -0.08 -0.16 -0.08 -0.08 -0.12 -0.16 -0.10 -0.08 -0.20 -0.43 -0.20 -0.71 -0.63 -0.83 -0.62
Velocity, ft/s 2.1 2.1 7.4 7.4 10.1 10.1 12.2 12.2 14.3 14.3
Distance to Water Surface, cm 66.5 66.5 63.8 63.8 59.0 59.0 55.0 55.0 49.7 49.7
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.49 1.39 3.09 2.51 7.44 4.42 12.43 6.12 20.71 8.69
GP Flex w/ Double Net Straw Blanket Anchorage: Unvegetated
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Cross-Section Measurements Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs:
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Date: 3/11/16 RECP: Lot #:
Slope: 10% Start Time: 9:14 AM Channel # Shear # Start Time: 10:08 AM Channel # Shear # Start Time: 11:03 AM Channel # Shear # Start Time: 1:18 PM Channel # Shear # Start Time: 3:44 PM Channel # Shear #
Width: 2 End Time: 9:44 AM 3 1 End Time: 10:38 AM 3 2 End Time: 11:33 AM 3 3 End Time: 1:48 PM 3 4 End Time: 4:14 PM 3 5
1.42 4.02 5.42 22.71 #DIV/0!
To original Surface Elev, cm 71.3 71.6 71.5 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 71.3 71.6 71.5 71.5 71.6 71.7 71.5 71.6 71.8 71.7 71.6 71.7 71.8 71.7 71.6 71.7 72.5 72.0 72.1 72.2
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 -0.12 -0.04 0.00 -0.05 -0.20 -0.04 -0.04 -0.09 -0.20 -0.04 -0.04 -0.09 -0.47 -0.16 -0.24 -0.26
CSLI, in 0.00 0.00 0.00 0.00 -0.12 -0.04 0.00 -0.05 -0.20 -0.04 -0.04 -0.09 -0.20 -0.04 -0.04 -0.09 -0.47 -0.16 -0.24 -0.26
Velocity, ft/s 2.4 2.4 6.8 6.8 9.6 9.6 12.8 12.8 14.2 14.2
Distance to Water Surface, cm 67.0 67.0 64.0 64.0 59.0 59.0 54.0 54.0 47.0 47.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.70 1.76 3.39 2.99 8.00 5.00 14.87 6.97 23.48 9.92
To original Surface Elev, cm 70.6 70.5 70.5 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.6 70.7 70.5 70.6 70.6 70.7 71.0 70.8 70.7 71.1 71.1 71.0 71.0 71.3 71.5 71.3 71.9 72.0 72.4 72.1
Soil Loss / Gain, in 0.00 -0.08 0.00 -0.01 0.00 -0.08 -0.20 -0.08 -0.04 -0.24 -0.24 -0.13 -0.16 -0.31 -0.39 -0.24 -0.51 -0.59 -0.75 -0.52
CSLI, in 0.00 -0.08 0.00 -0.01 0.00 -0.08 -0.20 -0.08 -0.04 -0.24 -0.24 -0.13 -0.16 -0.31 -0.39 -0.24 -0.51 -0.59 -0.75 -0.52
Velocity, ft/s 2.5 2.5 6.8 6.8 9.7 9.7 12.8 12.8 14.3 14.3
Distance to Water Surface, cm 66.5 66.5 63.0 63.0 58.0 58.0 53.0 53.0 47.0 47.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.67 1.61 3.47 3.06 8.25 5.10 15.34 7.19 23.55 9.88
To original Surface Elev, cm 71.0 71.5 71.3 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 71.1 71.5 71.3 71.3 71.1 71.5 71.4 71.3 71.5 71.5 71.4 71.5 71.5 71.7 71.8 71.7 72.4 72.8 72.5 72.6
Soil Loss / Gain, in -0.04 0.00 0.00 -0.01 -0.04 0.00 -0.04 -0.03 -0.20 0.00 -0.04 -0.08 -0.20 -0.08 -0.20 -0.14 -0.55 -0.51 -0.47 -0.43
CSLI, in -0.04 0.00 0.00 -0.01 -0.04 0.00 -0.04 -0.03 -0.20 0.00 -0.04 -0.08 -0.20 -0.08 -0.20 -0.14 -0.55 -0.51 -0.47 -0.43
Velocity, ft/s 2.5 2.5 6.8 6.8 9.9 9.9 12.9 12.9 14.6 14.6
Distance to Water Surface, cm 67.0 67.0 63.4 63.4 58.5 58.5 54.0 54.0 47.8 47.8
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.71 1.69 3.54 3.12 8.42 5.10 14.95 6.96 23.73 9.75
To original Surface Elev, cm 71.3 71.5 71.1 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 71.3 71.5 71.2 71.3 71.3 71.5 71.2 71.3 71.4 71.5 71.7 71.5 71.6 71.8 72.2 71.9 72.5 73.2 72.7 72.8
Soil Loss / Gain, in 0.00 0.00 -0.04 -0.01 0.00 0.00 -0.04 -0.01 -0.04 0.00 -0.24 -0.09 -0.12 -0.12 -0.43 -0.20 -0.47 -0.67 -0.63 -0.48
CSLI, in 0.00 0.00 -0.04 -0.01 0.00 0.00 -0.04 -0.01 -0.04 0.00 -0.24 -0.09 -0.12 -0.12 -0.43 -0.20 -0.47 -0.67 -0.63 -0.48
Velocity, ft/s 2.6 2.6 6.8 6.8 10.0 10.0 13.1 13.1 14.7 14.7
Distance to Water Surface, cm 67.1 67.1 63.7 63.7 59.0 59.0 54.5 54.5 47.8 47.8
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.72 1.67 3.41 3.01 8.22 4.93 14.93 6.84 24.11 9.84
To original Surface Elev, cm 70.0 70.1 70.4 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.0 70.1 70.5 70.2 70.5 70.3 70.6 70.5 70.8 70.5 71.0 70.8 71.0 71.5 71.3 71.3 72.0 72.4 73.0 72.5
Soil Loss / Gain, in 0.00 0.00 -0.04 -0.01 -0.20 -0.08 -0.08 -0.10 -0.31 -0.16 -0.24 -0.21 -0.39 -0.55 -0.35 -0.34 -0.79 -0.91 -1.02 -0.75
CSLI, in 0.00 0.00 -0.04 -0.01 -0.20 -0.08 -0.08 -0.10 -0.31 -0.16 -0.24 -0.21 -0.39 -0.55 -0.35 -0.34 -0.79 -0.91 -1.02 -0.75
Velocity, ft/s 2.7 2.7 6.9 6.9 10.0 10.0 13.0 13.0 14.8 14.8
Distance to Water Surface, cm 65.6 65.6 62.5 62.5 57.9 57.9 53.7 53.7 47.8 47.8
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.81 1.81 3.61 3.14 8.44 5.07 14.98 6.92 23.95 9.71
To original Surface Elev, cm 71.0 71.2 71.4 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 71.1 71.4 71.4 71.3 71.1 71.4 71.4 71.3 71.1 71.5 71.4 71.3 71.3 71.5 71.8 71.5 72.6 72.5 73.0 72.7
Soil Loss / Gain, in -0.04 -0.08 0.00 -0.03 -0.04 -0.08 0.00 -0.03 -0.04 -0.12 0.00 -0.03 -0.12 -0.12 -0.16 -0.11 -0.63 -0.51 -0.63 -0.51
CSLI, in -0.04 -0.08 0.00 -0.03 -0.04 -0.08 0.00 -0.03 -0.04 -0.12 0.00 -0.03 -0.12 -0.12 -0.16 -0.11 -0.63 -0.51 -0.63 -0.51
Velocity, ft/s 2.6 2.6 7.0 7.0 10.1 10.1 13.1 13.1 14.8 14.8
Distance to Water Surface, cm 67.2 67.2 64.0 64.0 59.0 59.0 54.0 54.0 47.7 47.7
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.70 1.61 3.35 2.87 8.17 4.86 15.07 6.90 24.28 9.84
To original Surface Elev, cm 70.9 71.4 71.3 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 71.0 71.4 71.3 71.2 71.0 71.4 71.3 71.2 71.0 71.5 71.4 71.3 71.1 71.5 71.6 71.4 71.8 72.7 73.1 72.5
Soil Loss / Gain, in -0.04 0.00 0.00 -0.01 -0.04 0.00 0.00 -0.01 -0.04 -0.04 -0.04 -0.03 -0.08 -0.04 -0.12 -0.07 -0.35 -0.51 -0.71 -0.44
CSLI, in -0.04 0.00 0.00 -0.01 -0.04 0.00 0.00 -0.01 -0.04 -0.04 -0.04 -0.03 -0.08 -0.04 -0.12 -0.07 -0.35 -0.51 -0.71 -0.44
Velocity, ft/s 2.7 2.7 7.0 7.0 10.2 10.2 13.1 13.1 14.9 14.9
Distance to Water Surface, cm 66.8 66.8 63.5 63.5 59.0 59.0 54.0 54.0 48.0 48.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.79 1.75 3.55 3.04 8.23 4.84 14.96 6.85 23.99 9.66
To original Surface Elev, cm 70.0 70.4 70.5 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.0 70.4 70.5 70.3 70.2 70.5 70.6 70.4 70.2 70.5 70.6 70.4 70.4 70.6 71.0 70.7 71.3 71.9 71.9 71.7
Soil Loss / Gain, in 0.00 0.00 0.00 0.00 -0.08 -0.04 -0.04 -0.05 -0.08 -0.04 -0.04 -0.05 -0.16 -0.08 -0.20 -0.13 -0.51 -0.59 -0.55 -0.45
CSLI, in 0.00 0.00 0.00 0.00 -0.08 -0.04 -0.04 -0.05 -0.08 -0.04 -0.04 -0.05 -0.16 -0.08 -0.20 -0.13 -0.51 -0.59 -0.55 -0.45
Velocity, ft/s 2.8 2.8 7.0 7.0 10.3 10.3 13.2 13.2 14.9 14.9
Distance to Water Surface, cm 66.1 66.1 63.1 63.1 58.0 58.0 53.5 53.5 47.5 47.5
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.77 1.65 3.37 2.89 8.40 4.90 14.87 6.76 23.66 9.53
To original Surface Elev, cm 70.0 70.3 70.0 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 70.0 70.3 70.1 70.1 70.2 70.6 70.2 70.3 70.5 70.8 70.8 70.7 70.6 71.0 71.4 71.0 72.0 72.2 72.5 72.2
Soil Loss / Gain, in 0.00 0.00 -0.04 -0.01 -0.08 -0.12 -0.08 -0.07 -0.20 -0.20 -0.31 -0.20 -0.24 -0.28 -0.55 -0.31 -0.79 -0.75 -0.98 -0.72
CSLI, in 0.00 0.00 -0.04 -0.01 -0.08 -0.12 -0.08 -0.07 -0.20 -0.20 -0.31 -0.20 -0.24 -0.28 -0.55 -0.31 -0.79 -0.75 -0.98 -0.72
Velocity, ft/s 2.8 2.8 7.1 7.1 10.4 10.4 13.3 13.3 15.0 15.0
Distance to Water Surface, cm 65.7 65.7 62.6 62.6 58.0 58.0 53.5 53.5 47.5 47.5
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.81 1.75 3.60 3.04 8.67 5.00 15.27 6.89 24.34 9.74
To original Surface Elev, cm 69.5 70.1 70.2 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.6 70.1 70.2 70.0 69.6 70.1 70.2 70.0 69.9 70.4 70.5 70.3 70.0 70.4 71.3 70.6 71.3 71.2 72.0 71.5
Soil Loss / Gain, in -0.04 0.00 0.00 -0.01 -0.04 0.00 0.00 -0.01 -0.16 -0.12 -0.12 -0.11 -0.20 -0.12 -0.43 -0.23 -0.71 -0.43 -0.71 -0.54
CSLI, in -0.04 0.00 0.00 -0.01 -0.04 0.00 0.00 -0.01 -0.16 -0.12 -0.12 -0.11 -0.20 -0.12 -0.43 -0.23 -0.71 -0.43 -0.71 -0.54
Velocity, ft/s 2.8 2.8 7.1 7.1 10.5 10.5 13.3 13.3 15.2 15.2
Distance to Water Surface, cm 65.5 65.5 62.5 62.5 57.7 57.7 53.5 53.5 47.0 47.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.82 1.76 3.48 2.94 8.66 4.95 14.89 6.72 24.44 9.65
To original Surface Elev, cm 69.5 70.0 69.9 Avg. Avg. Avg. Avg. Avg.
To eroded Surface Elev, cm 69.8 70.0 69.9 69.9 69.8 70.0 70.0 69.9 69.9 70.1 70.1 70.0 70.0 70.3 70.4 70.2 70.9 71.2 71.7 71.3
Soil Loss / Gain, in -0.12 0.00 0.00 -0.04 -0.12 0.00 -0.04 -0.05 -0.16 -0.04 -0.08 -0.09 -0.20 -0.12 -0.20 -0.15 -0.55 -0.47 -0.71 -0.50
CSLI, in -0.12 0.00 0.00 -0.04 -0.12 0.00 -0.04 -0.05 -0.16 -0.04 -0.08 -0.09 -0.20 -0.12 -0.20 -0.15 -0.55 -0.47 -0.71 -0.50
Velocity, ft/s 2.8 2.8 7.2 7.2 10.6 10.6 13.4 13.4 15.5 15.5
Distance to Water Surface, cm 66.1 66.1 63.0 63.0 58.0 58.0 53.0 53.0 47.0 47.0
Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in Flow, cfs Depth, in
0.70 1.50 3.28 2.73 8.37 4.74 15.15 6.78 24.68 9.55
GP Flex w/ Double Net Straw Blanket Anchorage: 3.8 / Sq. Yd. Unvegetated
Cross-Section Measurements Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs: Measured Volumetric Flow, cfs:
1
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5
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6
Calculations
4
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11
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Appendix
APPENDIX B – TEST SOIL
Test Soil Grain Size Distribution Curve
Compaction Curves
Veneer Soil Compaction Verification
November 8, 2013
Corporate Laboratory: 9063 Bee Caves Road, Austin, TX 78733 / 800-880-TEST / 512-263-2101 / [email protected] Downs Research Facility: 4915 Clemson Blvd., Anderson, SC 29621 / 864-242-2220 / [email protected]
0
10
20
30
40
50
60
70
80
90
100
0.00010.0010.010.1110100
PercentFiner
Particle Size (mm)
DDRF ASTM D 6460 Blended Test Soil
ASTM D 6460 Target Loam Range
Plasticity (ASTM D 4318)Liquid Limit: 31Plastic Limit: 24Plastic Index: 7
Soil classifies as a clayey sand (SC)in accordance with ASTM D 2487
The testing herein is based upon accepted industry practice as well as the test method listed. Test results reported herein do not applyto samples other than those tested. TRI neither accepts responsibility for nor makes claim as to the final use and purpose of the material.TRI observes and maintains client confidentiality. TRI limits reproduction of this report, except in full, without prior approval of TRI.
9063 Bee Caves Road ��$XVWLQ��7;����������������������������������������������������������7(67
James Sprague, 11/08/13
Tested by: J.E.Sprague
80
85
90
95
100
105
110
115
120
10 15 20 25 30 35 40 45 50
DryDensity(pcf)
Moisture Content (%)
Proctor Compaction Test
2.80
2.60
2.70
Project: DDRF
Sample No.: SLOPE COMPOSITE
Test Date: NOVEMBER 8, 2013
Test Method: ASTM D 698 - Method A
Maximum Dry Density (pcf): 99.2
Optimum Moisture Content (%): 19.5
Location: Date: 11/8/2013
Drive Cylinder: Dia., mm = 98 Length, mm = 127 Volume, ft3= 0.034
Tube # 1 2 3 4 5 6Wt. of Wet Soil + Mold (g) 2285.0 2262.0 2257.0 2249.0 2267.0 2270.0
Wt. of Mold (g) 615.0 615.0 615.0 615.0 615.0 615.0Wt. of Wet Soil (g) 1670.0 1647.0 1642.0 1634.0 1652.0 1655.0
Tare Number B T MWt. of Tare (g) 14.2 14.2 14.2 14.2 14.2 14.2
Wt. of Wet Soil + Tare (g) 24.5 24.3 26.5 25.3 22.5 23.9Wt. of Dry Soil + Tare (g) 22.8 22.7 24.6 23.5 21.1 22.5
Water Content, w (%) 19.396 18.588 18.252 19.334 20.260 16.847
:HW�GHQVLW\��ܵwet = W' / Vh (lb/ft3) = 108.73 107.24 106.91 106.39 107.56 107.76
'U\�GHQVLW\��ܵdry� �ܵwet / [1 + w] (lb/ft3) = 91.07 90.43 90.41 89.15 89.44 92.22
Max Std. Proctor Dry density (lb/ft3) = 98.60 98.60 98.60 98.60 98.60 98.60Opt. Moisture (%) = 19.80 19.80 19.80 19.80 19.80 19.80
Compaction as % of Std. Proctor = 92.4% 91.7% 91.7% 90.4% 90.7% 93.5%Avg Compaction as % of Std. Proctor =
The testing herein is based upon accepted industry practice as well as the test method listed. Test results reported herein do not applyto samples other than those tested. TRI neither accepts responsibility for nor makes claim as to the final use and purpose of the material.TRI observes and maintains client confidentiality. TRI limits reproduction of this report, except in full, without prior approval of TRI.
9063 Bee Caves Road ��$XVWLQ��7;����������������������������������������������������������7(67
James Sprague, 11/8/13
Quality Review/Date
Tested by: J.E. Sprague
Compaction WorksheetASTM D 2937
DDRF CHANNELS
Compaction
Moisture Content
91.7%
GP FLEX, Turf Reinforcement Mat, over Loam Channel Erosion Testing
March 31, 2016 Appendix
APPENDIX C – ANCHOR PATTERN