Energy dissipation in steep paved ditch.
Energy dissipation in steep paved ditch.
(OP)
We are rehabilitiating a low volume rural road (~300 vpd, sl=55 mph), and at one end, we have an asphalt paved ditch that is deteriorating. It's about 900 ft long on a 5-10% grade. Currently, vegetation growing in the thermal cracks provides some energy dissipation and filtration.
I'm looking for ideas for weirs, checkdams, etc. to manage the velocity and maybe improve water quality. It is in the road's clear zone, so I don't want anything that will cause an undue hazard to anyone that drifts into the ditch. Also, the right of way line is about 12 ft from the edge of shoulder.
Any suggestions?
I'm looking for ideas for weirs, checkdams, etc. to manage the velocity and maybe improve water quality. It is in the road's clear zone, so I don't want anything that will cause an undue hazard to anyone that drifts into the ditch. Also, the right of way line is about 12 ft from the edge of shoulder.
Any suggestions?





RE: Energy dissipation in steep paved ditch.
RE: Energy dissipation in steep paved ditch.
Not sure what the budget is, but you could consider a set of storm sewer inlets to decrease the energy/erosion potential.
Maybe grouted riprap ditch with low profile (embedded) angular rock?
I also think you can use the CMU blocks mentioned above - which can include a design to allow vegetation to grow in the voids.
RE: Energy dissipation in steep paved ditch.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Energy dissipation in steep paved ditch.
RE: Energy dissipation in steep paved ditch.
But that's just one idea.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Energy dissipation in steep paved ditch.
RE: Energy dissipation in steep paved ditch.
RE: Energy dissipation in steep paved ditch.
There's really no other way to get any sort of 'water quality' element into this, as far as I can see, due to the grades.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Energy dissipation in steep paved ditch.
RE: Energy dissipation in steep paved ditch.
Has anyone tried the erosion control matting or reinforced vegetation on grades this steep? The sales reps will promise the stars, but I'm interested in real world results.
http://www.nagreen.com/erosion-control-products/vm...
http://www.acfenvironmental.com/TurfReinforcementM...
RE: Energy dissipation in steep paved ditch.
RE: Energy dissipation in steep paved ditch.
Dik