Villanova Constructed Treatment Wetlands for Stormwater Management An Overview of The Technology and Two Case Studies Constructed Treatment Wetlands for Stormwater Management An Overview of The Technology and Two Case Studies Villanova What Is A Constructed Wetland? What Is A Constructed Wetland? Saturated Substrates Definition: A designed and man-made complex of: Emergent and Submergent Vegetation Mircobes Water Physical, Chemical and Biological Contaminant Removal Processes that Emulate a Natural Wetland System
10
Embed
Constructed Treatment Wetlands for Stormwater Management An … · 2020. 9. 12. · Villanova 55 1515 44 33 22 11 00 Typical Construction Costs CONSTRUCTED WETLANDS CONSTRUCTED WETLANDS
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Villanova
Constructed Treatment Wetlands
for
Stormwater Management
An Overview of The Technology
and Two Case Studies
Constructed Treatment Wetlands
for
Stormwater Management
An Overview of The Technology
and Two Case Studies
Villanova
What Is AConstructed Wetland?
What Is AConstructed Wetland?
Saturated Substrates
Definition:A designed and man-made complex of:
Emergent and Submergent Vegetation
Mircobes
Water
Physical, Chemical and Biological ContaminantRemoval Processes that Emulate a Natural WetlandSystem
Villanova
Types of ContaminantsTreated
Types of ContaminantsTreated
l Nitrate
l Ammonial Phosphate
l Coliform Bacteria
l Total Suspended Solids (TSS)
l Oil and Greasel Benzene, Ethylbenzene, Toluene and Xylenes (BTEX)
l Chlorinated Solvents
l Polynuclear Aromatic Hydrocarbons (PAH)
l Heavy Metals (iron, lead, zinc, chromium, cadmium, nickel, silver, cooper and manganese
l Alcohols, Glycols
Villanova
Rip-Rap PlantingSubstratePlantingSubstrate
Rip-Rap
Water Level
HydraulicGradient
EffluentCollection System
Water Level
To ReceivingSystem
EffluentCollection System
InfluentDistribution
SystemTo Receiving
System
Treatment Media(gravel, sand, soil)
InfluentDistribution
System
OutflowControl
Structure
Treatment Media(gravel, sand, soil)
InflowControl
Structure
OutflowControl
Structure
InflowControl
Structure
Conceptual CTW SubsurfaceFlow Systems
Villanova
55
1515
44
33
22
11
00
Typical Construction Costs
CONSTRUCTEDWETLANDS
CONSTRUCTEDWETLANDS
LAGOONSLAGOONS
CONVENTIONALTREATMENT
SYSTEMS
CONVENTIONALTREATMENT
SYSTEMS
$PER
GALLONPERDAY
$PER
GALLONPERDAY
Villanova
Anatomy of a Typical CW ProjectAnatomy of a Typical CW Project
ll Work ElementsWork Elements–– Waste stream Characterization AnalysisWaste stream Characterization Analysis–– Treatability White PaperTreatability White Paper–– Site SelectionSite Selection–– Bench Testing (Optional)Bench Testing (Optional)–– Pilot TestingPilot Testing–– FullFull--Scale DesignScale Design–– Construction OversightConstruction Oversight–– Performance EvaluationPerformance Evaluation
Villanova
Case Study No. 1 Williamsburg, Virginia
Case Study No. 1 Williamsburg, Virginia
•• Treat surface water runoff into an impoundment Treat surface water runoff into an impoundment impacted by landfill leachateimpacted by landfill leachate
•• COCs: Zinc, Iron and Acidity COCs: Zinc, Iron and Acidity
FundingFundingl To encourage environmental and economically sound
development, the New York Department of State (NYDOS) awarded the City of Glen Cove a grant under the Long Island Sound Coastal Management Program to develop the Glen Cove Creek Revitalization Plan.
l A second NYSDOS grant was awarded through the NYS Environmental Protection Fund to the City of Glen Cove to study the feasibility of creating a stormwater treatment system to improve water quality and eliminate and/or reduce siltation in Mill Pond and Glen Cove Creek, and ultimately Hempstead Harbor.
l As part of the Charles Street road extension/upgrade and the incorporation of a pedestrian path into the project design, the Department of Transportation covered all construction costs via the Transportation Equity Act