Practical Silt Fence Design Enhancements for Effective Dewatering and Stability
Publication: Journal of Irrigation and Drainage Engineering
Volume 147, Issue 1
Abstract
Many of today’s construction sites rely on perimeter control practices to capture and treat sediment-laden stormwater emanating from disturbed lands. Silt fence systems are a common sediment control practice often specified by stormwater designers to be installed as perimeter control applications. Although design considerations are often given to the location and placement of these systems within the boundaries of a site, design characteristics of the silt fence itself (e.g., post size, post spacing, and fence height, among others) are rarely taken into consideration. As a result, silt fence systems often become overloaded and fail due to insufficient support or lack of effluent flow capability. Thus, this research effort sought to identify and evaluate practical methods for managing the discharge of impounded stormwater and improving the structural stability of silt fence systems. Results from full-scale testing suggest the inclusion of a plywood dewatering mechanism resulted in 96% sediment retention and effluent water quality data similar to results associated with standard silt fence installations. Silt fence dewatering time was reduced from over 24 to 4 h with minimal downstream disturbance of soil and vegetation. Finally, structural analysis data from five common silt fence support posts were used to determine post spacing based on structural load limits. Using these data and in-field observations, recommended distances for post spacing were developed for each support post type.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request. The following data sets are available: raw measurements collected during experimentation and photographs documenting experiments.
Acknowledgments
The authors would like to thank the Alabama DOT for its sponsorship of this research. The findings, opinions, and conclusions presented are those of the authors and do not necessarily reflect the view of the sponsor.
References
AASHTO. 2014. AASHTO drainage manual. Volume 1—Policy. Washington, DC: AASHTO.
AASHTO. 2017. Standard specifications for geosynthetics specifications for highway applications. Washington, DC: AASHTO.
ALSWCC (Alabama Soil and Water Conservation Committee). 2014. “Alabama handbook for erosion control, sediment control and storm water management on construction sites and urban areas.” Accessed October 26, 2018. https://www.dot.state.al.us/dsweb/divped/Stormwater/pdf/AlabamaHandbookforErosionControl.pdf.
Barrett, M. E., J. E. Kearney, T. G. McCoy, and J. F. Malina. 1995. An evaluation of the use and effectiveness of temporary sediment controls. Center for Research in Water Resources Technical Rep. No. 261. Austin, TX: Univ. of Texas at Austin.
Barrett, M. E., J. F. Malina, and R. J. Charbeneau. 1998. “Evaluation of geotextiles for temporary sediment control.” Water Environ. Res. 70 (3): 283–290. https://doi.org/10.2175/106143098X124902.
Bugg, R. A., W. N. Donald, W. C. Zech, and M. A. Perez. 2017a. “Improvements in standardized testing for evaluating sediment barrier performance: Design of a full-scale testing apparatus.” J. Irrig. Drain. Eng. 143 (8): 04017029. https://doi.org/10.1061/(ASCE)IR.1943-4774.0001194.
Bugg, R. A., W. N. Donald, W. C. Zech, and M. A. Perez. 2017b. “Performance evaluations of three silt fence practices using a full-scale testing apparatus.” Water 9 (7): 502. https://doi.org/10.3390/w9070502.
CalTRANS (California DOT). 2017. “Caltrans storm water quality handbooks: Construction site best management practices manual.” Accessed October 30, 2018. http://www.dot.ca.gov/hq/construc/stormwater/CSBMP-May-2017-Final.pdf.
Donald, W. N., W. C. Zech, M. A. Perez, and X. Fang. 2016. “Evaluation and modification of wire backed, nonwoven filter fabric silt fence for use as a ditch check.” J. Irrig. Drain. Eng. 142 (2): 04015050. https://doi.org/10.1061/(ASCE)IR.
Fennessey, L. A. J., and A. R. Jarrett. 1997. “Influence of principal spillway geometry and permanent pool depth on sediment retention of sedimentation basins.” Trans. ASAE 40 (1): 53–59. https://doi.org/10.13031/2013.21248.
GSWCC (Georgia Soil and Water Conservation Commission). 2016. “Manual for erosion and sediment control in Georgia.” Accessed October 30, 2018. http://gaswcc.georgia.gov/sites/gaswcc.georgia.gov/files/related_files/site_page/GSWCC-2016-Manual-As-Approved-by-Overview-Council.pdf.
Iowa DOT. 2018. “Erosion control technician reference manual.” Accessed October 30, 2018. https://iowadot.gov/training/ttcp/training_manuals/ErosionRefMan.pdf.
Keener, H. M., B. Faucette, and M. H. Klingman. 2007. “Flow-through rates and evaluation of solids separation of compost filter socks versus silt fence in sediment control applications.” J. Environ. Qual. 36 (3): 742–752. https://doi.org/10.2134/jeq2006.0359.
North Carolina DOT. 2015. “Erosion and sediment control design and construction manual.” Accessed October 30, 2018. https://connect.ncdot.gov/resources/hydro/HSPDocuments/NCDOT_ESC_Manual_2015.pdf.
NYSDEC (New York State Department of Environmental Conservation). 2016. “New York state standards and specifications for erosion and sediment control.” Accessed October 30, 2018. https://www.dec.ny.gov/docs/water_pdf/2016nysstanec.pdf.
Perez, M. A., W. C. Zech, W. N. Donald, and X. Fang. 2016. “Installation enhancements to common inlet protection practices (IPPs) using large-scale testing techniques.” Transp. Res. Rec. 2571 (1): 151–161. https://doi.org/10.3141/2521-16.
Pitt, R., S. E. Clark, and D. W. Lake. 2017. Construction site erosion and sediment controls: Planning, design and performance. Lancaster, PA: DesTech.
Risse, L. M., S. A. Thompson, J. Governo, and K. Harris. 2008. “Testing of new silt fence materials: A case study of a belted strand retention fence.” J. Soil Water Conserv. 63 (5): 265–273. https://doi.org/10.2489/jswc.63.5.265.
Schwartz, J. S., and J. M. Hathaway. 2018. “In-service performance evaluations of erosion prevention and sediment control devices.” Accessed February 21, 2020. https://www.tn.gov/content/dam/tn/tdot/documents/RES2016-19.pdf.
Texas DOT. 2016. “Temporary erosion, sediment and water pollution control measures.” Accessed October 30, 2018. ftp://ftp.dot.state.tx.us/pub/txdot-info/cmd/cserve/standard/roadway/ec116.pdf.
Troxel, C. F. 2013. “Life cycle analysis of sediment control devices.” Accessed October 30, 2018. https://smartech.gatech.edu/bitstream/handle/1853/49105/TROXEL-THESIS-2013.pdf.
USEPA. 2004. Filter fence design aid for sediment control at construction sites. Rep. No. Washington, DC: USEPA.
USEPA. 2017. National pollutant discharge elimination system construction general permit for discharges from construction activities. Washington, DC: USEPA.
Washington State DOT. 2013. “Standard plans.” Accessed October 30, 2018. http://www.wsdot.wa.gov/Design/Standards/#StdPlans.
Whitman, J. B., W. C., Zech, and W. N. Donald. 2019. “Full-scale performance evaluations of innovative and manufactured sediment barrier practices.” Transp. Res. Rec. 2673 (8): 284–297. https://doi.org/10.1177/0361198119827905.
Whitman, J. B., W. C. Zech, W. N. Donald, and J. J. LaMondia. 2018. “Full-scale performance evaluations of various wire-backed nonwoven silt fence installation configurations.” Transp. Res. Rec. 2672 (39): 68–78. https://doi.org/10.1177/0361198118758029.
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© 2020 American Society of Civil Engineers.
History
Received: Mar 17, 2020
Accepted: Aug 17, 2020
Published online: Nov 2, 2020
Published in print: Jan 1, 2021
Discussion open until: Apr 2, 2021
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