energy, stormwater, sustainability update - Arlingtonva
ENERGY, STORMWATER, SUSTAINABILITY UPDATE
Countywide Sustainability Efforts
Firm Overview
Buro Happold’s Role
Arlington County
Cooper, Robertson & Partners
Kimley-Horn Parking
Nelson/Nygaard Transportation
HR&A Advisors Real Estate Economics
Tactical Aesthetics Public Art
Buro Happold Sustainability Energy Stormwater
Triple Bottom Line Approach
SOCIAL
people and places
ECONOMIC
stability and growth
ENVIRONMENTAL air, earth and water
Sustainability Framework
Sustainability Framework
Sustainability Framework
Stormwater
Features of Unsustainable Urban Drainage • • • • • • •
Reduction in natural storage capacity Large, rapid runoff quantities Reduction in natural recharge Aging Infrastructure Flooding Concentrated pollutant load Downstream management issues
Water Sensitive Urban Design Best Management Practices* • • • • • • • • • • • •
Rooftop Disconnection Sheetflow to Vegetated Filter or Conserved Open Space Grass Channel Soil Amendments Vegetated Roofs Rainwater Harvesting Permeable Pavement Infiltration Basins and Trenches Bioretention Dry and Wet Swales Constructed Wetlands Wet and Extended Detention Ponds
*from the Virginia Stormwater BMP Clearinghouse
a.k.a. watershed retrofits, SUDs, BMPs
Regional Context
Courthouse Square
Existing Conditions
Designing for Quantity and Quality
Precedent: Sidwell Friends School, DC
• •
K-12 private school located on a 15-acre site in Tenleytown, D.C. Completed in 2007, includes an eco-friendly courtyard, a green roof, wetlands system for stormwater and wastewater, educational information
Precedent: Sidwell Friends School, DC
•
Wastewater management system treats 3,000 gallons per day. After circulating through the landscape for three to five days, the water is re-used in the building’s toilets and cooling tower.
Precedent: Sidwell Friends School, DC
•
On-site sewage treatment, water re-use, and water-efficient native plants reduce the school’s water consumption by 93 percent
Precedent: SQ. 80 Plaza GWU, DC •
Sustainable Sites Certified
•
Biofiltration planters, native plant material, pervious pavers, cisterns, rain barrel, and sculptural fountain designed to reuse captured water
•
Three large underground cisterns totalling 33,000 gallons
•
90% runoff reduction
•
Lessons: Need for early/complete surveys, including a geotech, all existing utilities, topography and soil conditions
Precedent: Brisbane City Hall, CA
• •
Retrofit to City Hall to demonstrate sustainable stormwater management. Existing site previously had its parking lot paved completely to the face of the City Hall
Precedent: Brisbane City Hall, CA
• •
The site design allowed the rain garden, a small plaza space, safer pedestrian circulation, and bike parking the without any loss of parking Interpretative signage is also placed at the rain garden to let visitors know that this is a functional landscape space.
Energy
Arlington County Community Energy Plan (2013) “To become a sustainable community, Arlington must rethink the way it uses, generates, and distributes energy.” Three Benefit Areas: Economic Competitiveness Environmental Commitment Energy Security Six Target Areas: Buildings District Energy Renewable Energy Transportation County Government Activities Education and Human Behavior
Our Approach
Climate Context
Benchmarking
Massing and Orientation
Passive Design
Efficient Systems
Renewables
DISTRICT GENERATION / CHP
Data Collection: Buildings
Energy Modeling Process County Buildings
Collect Data Conduct Audits
Make these assumptions static
SIMULATION ANALYSIS Building Scale: Assess ECMs
Identify Constraints
Turn these buildings on/off
Private Buildings
Highlight potential centralization partners Develop high level estimates Build simple models
New Development
District Scale: Assess 5-7 DE Scenarios
RECOMMENDATIONS Vet Scenarios through planning filters
Assume 30% below ASHRAE Standard 90.1 Develop building massing and load profile
Make these assumptions static
Measure and weigh outputs (NPV, GHG)
Data Collection: County Buildings PUBLIC BUILDING BENCHMARKING • THE ENERGY USE INTENSITIES (EUIs) OF THE PUBLIC BUILDINGS IN COURTHOUSE SQUARE HAVE BEEN BENCHMARKED AGAINST OFFICE BUILDINGS IN WASHINGTON, D.C.
Washington, DC Office Buildings (2012)
• THE THOMAS BUILDING HAS A RELATIVELY HIGH EUI; THE USE PROFILE OF THE BULIDING IS CHANGING
• COURTHOUSE PLAZA IS AT THE UPPER END OF THE SPECTRUM, PARTICULARLY WITH REGARDS TO SOURCE ENERGY DUE TO ITS ALL-ELECTRIC BUILDING SYSTEMS • NOTE THAT BENCHMARKING IS ONLY PART OF THE STORY – A MORE COMPLETE AUDIT IS UNDERWAY Washington, DC Office Buildings (2012)
Data Collection: County Buildings
Preliminary Simulation Modeling
Countywide Sustainability Efforts
Firm Overview
Buro Happold’s Role
Arlington County
Cooper, Robertson & Partners
Kimley-Horn Parking
Nelson/Nygaard Transportation
HR&A Advisors Real Estate Economics
Tactical Aesthetics Public Art
Buro Happold Sustainability Energy Stormwater
Triple Bottom Line Approach
SOCIAL
people and places
ECONOMIC
stability and growth
ENVIRONMENTAL air, earth and water
Sustainability Framework
Sustainability Framework
Sustainability Framework
Stormwater
Features of Unsustainable Urban Drainage • • • • • • •
Reduction in natural storage capacity Large, rapid runoff quantities Reduction in natural recharge Aging Infrastructure Flooding Concentrated pollutant load Downstream management issues
Water Sensitive Urban Design Best Management Practices* • • • • • • • • • • • •
Rooftop Disconnection Sheetflow to Vegetated Filter or Conserved Open Space Grass Channel Soil Amendments Vegetated Roofs Rainwater Harvesting Permeable Pavement Infiltration Basins and Trenches Bioretention Dry and Wet Swales Constructed Wetlands Wet and Extended Detention Ponds
*from the Virginia Stormwater BMP Clearinghouse
a.k.a. watershed retrofits, SUDs, BMPs
Regional Context
Courthouse Square
Existing Conditions
Designing for Quantity and Quality
Precedent: Sidwell Friends School, DC
• •
K-12 private school located on a 15-acre site in Tenleytown, D.C. Completed in 2007, includes an eco-friendly courtyard, a green roof, wetlands system for stormwater and wastewater, educational information
Precedent: Sidwell Friends School, DC
•
Wastewater management system treats 3,000 gallons per day. After circulating through the landscape for three to five days, the water is re-used in the building’s toilets and cooling tower.
Precedent: Sidwell Friends School, DC
•
On-site sewage treatment, water re-use, and water-efficient native plants reduce the school’s water consumption by 93 percent
Precedent: SQ. 80 Plaza GWU, DC •
Sustainable Sites Certified
•
Biofiltration planters, native plant material, pervious pavers, cisterns, rain barrel, and sculptural fountain designed to reuse captured water
•
Three large underground cisterns totalling 33,000 gallons
•
90% runoff reduction
•
Lessons: Need for early/complete surveys, including a geotech, all existing utilities, topography and soil conditions
Precedent: Brisbane City Hall, CA
• •
Retrofit to City Hall to demonstrate sustainable stormwater management. Existing site previously had its parking lot paved completely to the face of the City Hall
Precedent: Brisbane City Hall, CA
• •
The site design allowed the rain garden, a small plaza space, safer pedestrian circulation, and bike parking the without any loss of parking Interpretative signage is also placed at the rain garden to let visitors know that this is a functional landscape space.
Energy
Arlington County Community Energy Plan (2013) “To become a sustainable community, Arlington must rethink the way it uses, generates, and distributes energy.” Three Benefit Areas: Economic Competitiveness Environmental Commitment Energy Security Six Target Areas: Buildings District Energy Renewable Energy Transportation County Government Activities Education and Human Behavior
Our Approach
Climate Context
Benchmarking
Massing and Orientation
Passive Design
Efficient Systems
Renewables
DISTRICT GENERATION / CHP
Data Collection: Buildings
Energy Modeling Process County Buildings
Collect Data Conduct Audits
Make these assumptions static
SIMULATION ANALYSIS Building Scale: Assess ECMs
Identify Constraints
Turn these buildings on/off
Private Buildings
Highlight potential centralization partners Develop high level estimates Build simple models
New Development
District Scale: Assess 5-7 DE Scenarios
RECOMMENDATIONS Vet Scenarios through planning filters
Assume 30% below ASHRAE Standard 90.1 Develop building massing and load profile
Make these assumptions static
Measure and weigh outputs (NPV, GHG)
Data Collection: County Buildings PUBLIC BUILDING BENCHMARKING • THE ENERGY USE INTENSITIES (EUIs) OF THE PUBLIC BUILDINGS IN COURTHOUSE SQUARE HAVE BEEN BENCHMARKED AGAINST OFFICE BUILDINGS IN WASHINGTON, D.C.
Washington, DC Office Buildings (2012)
• THE THOMAS BUILDING HAS A RELATIVELY HIGH EUI; THE USE PROFILE OF THE BULIDING IS CHANGING
• COURTHOUSE PLAZA IS AT THE UPPER END OF THE SPECTRUM, PARTICULARLY WITH REGARDS TO SOURCE ENERGY DUE TO ITS ALL-ELECTRIC BUILDING SYSTEMS • NOTE THAT BENCHMARKING IS ONLY PART OF THE STORY – A MORE COMPLETE AUDIT IS UNDERWAY Washington, DC Office Buildings (2012)
Data Collection: County Buildings
Preliminary Simulation Modeling
