THE LIFE-CYCLE COSTS AND BENEFITS OF RAIN GARDENS IN MINNESOTA
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Transcript of THE LIFE-CYCLE COSTS AND BENEFITS OF RAIN GARDENS IN MINNESOTA
THE LIFE-CYCLE COSTS THE LIFE-CYCLE COSTS AND BENEFITS OF RAIN AND BENEFITS OF RAIN
GARDENS IN GARDENS IN MINNESOTAMINNESOTA
Chris Hartzell & Joe Chris Hartzell & Joe NietfeldNietfeld
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
INTRODUCTIONINTRODUCTION Rain GardensRain Gardens
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
RELEVANCERELEVANCE
MinnesotaMinnesota Push from communities and watershed Push from communities and watershed
management organizations to utilize rain water management organizations to utilize rain water gardensgardens
Incomplete or incomprehensible studies have Incomplete or incomprehensible studies have been done so far regarding rain water gardensbeen done so far regarding rain water gardens
DevelopmentDevelopment Cities are encouraging developers to utilize rain Cities are encouraging developers to utilize rain
gardens versus traditional storm sewer through gardens versus traditional storm sewer through the use of an incentivethe use of an incentive
Cities need to quantify benefit to their communityCities need to quantify benefit to their community
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
ADVANTAGESADVANTAGES
Advantage of Rain GardensAdvantage of Rain Gardens Cheaper to build versus traditional Cheaper to build versus traditional
storm water conveyance methodsstorm water conveyance methods Greater beauty with a well maintained Greater beauty with a well maintained
gardengarden Recharges groundwater locallyRecharges groundwater locally Takes pollutants out of storm water Takes pollutants out of storm water
runoffrunoff Return to pre-development hydrologyReturn to pre-development hydrology
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
DISADVANTAGESDISADVANTAGES
Disadvantage of Rain GardensDisadvantage of Rain Gardens Poor construction methods allow mosquitoes to Poor construction methods allow mosquitoes to
breedbreed City or resident does not follow through on City or resident does not follow through on
maintenance activitiesmaintenance activities Necessity for more landNecessity for more land Loss of land valueLoss of land value Only handle small storm water runoff eventsOnly handle small storm water runoff events They don’t provide flood controlThey don’t provide flood control Bio-retention is started after homes are builtBio-retention is started after homes are built Long-term benefits have not been studiedLong-term benefits have not been studied
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
PROBLEM STATEMENTPROBLEM STATEMENT
Since rain gardens are a relatively Since rain gardens are a relatively new concept, little is known about new concept, little is known about their long-term maintenance costs their long-term maintenance costs relative to traditional storm water relative to traditional storm water management practicesmanagement practices
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
PROBLEM STATEMENTPROBLEM STATEMENT
Infrastructure Systems Engineering Infrastructure Systems Engineering (ISE) practices such as life cycle cost (ISE) practices such as life cycle cost and cost benefit analysis could be and cost benefit analysis could be applied to rain gardens to evaluate applied to rain gardens to evaluate them over their entire life from them over their entire life from design to construction to long term design to construction to long term maintenancemaintenance
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
OBJECTIVEOBJECTIVE
Evaluate the effectiveness of rain Evaluate the effectiveness of rain gardens over their life cycles gardens over their life cycles relative to a traditional storm water relative to a traditional storm water management systemmanagement system
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
COSTS AND BENEFITSCOSTS AND BENEFITS Life Cycle CostsLife Cycle Costs
Design Design ConstructionConstruction Quality ControlQuality Control Long Term MaintenanceLong Term Maintenance
BenefitsBenefits Pollutant RemovalPollutant Removal Storm water reductionStorm water reduction
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
PARAMETERS AFFECTING PARAMETERS AFFECTING COSTCOST
Soil ConditionsSoil Conditions HydrologyHydrology LocationLocation Infiltration RatesInfiltration Rates Plant SpeciesPlant Species Land PricesLand Prices
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
EXPECTED PRODUCTEXPECTED PRODUCT
To be used as a…To be used as a… Storm Water Management ToolStorm Water Management Tool
MunicipalitiesMunicipalities DevelopersDevelopers
Decision Making ToolDecision Making Tool Will rain gardens work in the communityWill rain gardens work in the community Determine incentives to give to developersDetermine incentives to give to developers
“ A detailed “Best Uses” Guide showing the most effective uses of rain gardens from a life cycle perspective
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ISE 8105: Capstone DesignISE 8105: Capstone DesignInfrastructure Systems EngineeringInfrastructure Systems EngineeringInstructor: Vaughn VollerInstructor: Vaughn Voller
QUESTIONS?QUESTIONS?