Grassed waterways are natural or constructed channels shaped to required dimensions and lined with suitable vegetation for stable conveyance of runoff.
Grassed waterways are natural or constructed channels shaped to required dimensions and lined with suitable vegetation for stable conveyance of runoff. Grass-lined water conveyance channels are widely used to convey excess runoff water where flows are of a sufficiently short duration to allow the grass to withstand the inundation period and operation is sufficiently infrequent to allow healthy grass cover to be maintained.
This type of channel may be used for diversions, spillways, and floodways, as well as for waterways to convey local runoff. A constructed waterway is designed to carry the estimated flow without damage to the waterway or its lining, and should be planned and designed to fit the conditions of a particular site.
Topics: Introduction Assessment of suitability Legal/regulatory considerations Planning and preliminary design considerations Location Slope Cross-section shape Vegetation Outlets Sediment control Data collection Design process Initial design parameters: slope, discharge, section, and lining Conditions for stability Sizing channel sections Use of the design tables for parabolic and trapezoidal channels Layout and construction Appurtenant structures Site preparation Excavation Filter fabric barriers Post-construction protection of channel lining Maintenance Removal of sediment Repair work
Intended Audience: This course is intended for Water Resources, Civil, Environmental, Transportation, and other engineers whose job description requires a general knowledge of grass-lined or vegetative water conveyance channel design.
Publication Source: USDA (Natural Resources Conservation Service)
Dr. Harlan Bengtson is an online PDH course provider of continuing education courses for professional engineers. Dr. Bengtson is a graduate of Iowa State University with B.S. and M.S. degrees and of the University of Colorado with a PhD. He is a licensed Professional Engineer in Missouri. Dr. Bengtson has spent 30 years in engineering education in teaching and administrative positions, including six years as Dean of Engineering at Southern Illinois University Edwardsville. Dr. Harlan H. Bengtson, PE 33 Grainey Drive Glen Carbon, IL 62034 Phone: (618) 406-6892 E-mail: hnkbengtson@yahoo.com PROFESSIONAL PROFILE Dr. Bengtson is a graduate of Iowa State University with B.S. and M.S. degrees and of the University of Colorado with a PhD. He is a licensed Professional Engineer in Missouri. He has spent 30 years in engineering education in teaching and administrative positions, including six years as Dean of Engineering at Southern Illinois University Edwardsville. His areas of expertise are environmental engineering, hydrology and hydraulics, engineering science and renewable energy systems. He has done regular consulting work while holding the academic positions. Prior to entering academia, Dr. Bengtson worked for Minnesota Mining & Manufacturing as a Product Development Engineer and for E. I. duPont deNemours as a Process Development Engineer. Dr. Bengtson has authored numerous publications, presentations and technical reports. He is currently active as a freelance technical writer, author of continuing education courses for Professional Engineers, and is the founder of www.engineeringexceltemplates.com and www.EngineeringExcelSpreadsheets.com, sites with the objective of providing inexpensive, easy to use Excel spreadsheets for a variety of engineering calculations.
