August 26, 2013 at 4:02 pm #154259
I am looking for resources on constructed treatment wetlands- specifically located on a fairly steep bank treating stormwater from interstate/roadways.August 26, 2013 at 5:38 pm #154268Rob HalpernParticipantAugust 27, 2013 at 8:31 pm #154267Trace OneParticipant
Why are you locating treatment on steep slopes? Best Management Practices would put the low point ditch in some kind of BMP planting design, but steep slopes are only for erosion control, really. More info needed, maybe? or are you just looking for what to do on steep slopes? (contour grading and erosion control)…August 27, 2013 at 8:49 pm #154266
This is for a bridge that crosses a river. There is a stormwater outlet at the steepest part of the slope, but quickly flattens as drainage would reach the river. My thinking now is to incorporate a series of check dams (as part of erosion control) into the slope and have a constructed wetland closer to the river. I am hoping to find a project that is similar, but have not had any luck.
Thank you all for your response!August 27, 2013 at 9:09 pm #154265Trace OneParticipant
check out these guys, they are masters..What you are talking about is not rocket science, you just stated exactly what you need for design..check dams and recreated wetlands lower down slope, next to river.. Good idea ( I think!?) that is how it should be.
Biohabitats recreated a part of a river running through Azalea Park in Charlottesville, Va. when I worked there – they redid a degenerated river curve with willow wattles according to curve calulations done by them. I could not believe they were proposing to remove any existing substantial willows. It was a good design, but I still think existing plants should be preserved.August 30, 2013 at 2:51 am #154264Goustan BODINParticipant
Hope this book will change your professional life the way it changed mine :August 30, 2013 at 11:08 am #154263Francis Paul DickinsonParticipant
Melbourne Water in Australia have good guidelines on constructed wetlands just look them up on the web. City of Melbourne WSUD guidelines, Virginia DCR Stormwater Spec, City of Portland Stormwater Manual and California Department of Transport Website are useful.
Although what you describe might suit a bio-infiltration trench/basin setup better as roads often carry heavy metals and toxins that can damage fragile eco-systems.
Alternatively you can design in an entire treatment train starting with roadside swales – infiltration trench – bio-retention basin and then a constructed wetland. It depends on what your trying to achieve in terms of local water infiltration or a complete water treatment cycle.
Hope This helpsAugust 30, 2013 at 12:23 pm #154262
Thank you! I will check them out as well.August 30, 2013 at 5:55 pm #154261Phil MooreheadParticipant
The first thing that came to mind was a series of terraced rice paddies (substitute sedges and rushes). If this were somehow visually accessible, it might be worthwile to recreate that aesthetic. Here’s a pretty entertaining animation: http://www.pbs.org/wgbh/nova/ancient/rice-paddy.htmlAugust 30, 2013 at 8:01 pm #154260Goustan BODINParticipant
I f you happen to know this guy, please forward him my best regards. Not just the regular signature type best regards, but something that comes from deep within. This book is just colossal.
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