Lec 6 Flashcards
What is a brownfield?
A brownfield is a property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant.
Some examples of brownfield
Former Gas Stations, Abandoned Dump Site, Abandoned
Plants/Factories, Vacant Textile Mills, Abandoned Dry Cleaner, Former Military Sites
5 contaminants making up the brownfields
Lead, Petroleum, Asbestos, Polycyclic Aromatic Hydrocarbons (PAHs), Other metals,
3 main differences between brownfield and greenfield
Greenfields are usually available in larger sizes, have no utilities set up, no demolition is required, reduce habitat wildlife.
Economical incentives to adapting brownfield
urban sprawl (expansion of the cities), bid-rent war (higher price for lands closer to the city center), new spaces for industrialization and globalization
Economic viability for adapting brownfields
See pictures (phone)
What are some Economic Geography Rationale for people that avoid inhabiting brownfields?
- they are risky, contaminated properties.
- higher-income residents are reluctant to live
Another key (Economic viability and sustainability)
Environmental Justice:
- same degree of protection from hazards and environmental problems for everyone
- equal access to decision-making to have a healthy environment
Why should we develop brownfields?
- Creating Jobs and Economic Growth
- Pollution Cleanup and increase public health
- Downtown Revitalization
- Less Development Pressure on Open Land
- More properties on the tax rolls
- historic prevention
What policymakers can do to make brownfields interesting again?
- Grants (Municipalities and Economic Development Agencies)
- Liability Relief
- Low-Interest Loans (developers, municipalities, agencies)
- Tax Incremental Financing
Types of solutions adapted for Green Infrastructure
Green Roofs and Photovotaics panels
What does green roof do?
reduce the temp. of bldg. and envr.
advantges photovoltain panels
clean energy production and reduce CO2 emission
Why do we need to combine PVs and Green Roofs?
They both are installed on the exterior of the bldg.
Solutions used to mitigate UHI ?
Urban Heat Island effect can be mitigated by using PVs and Greeneries
What are the benefits of Green Infrastructure?
Noise reductions, stormwater retention, dust-particle filtering, increase biodiversity by providing habitats for plants and animals
What is BG and what does it involve?
Building Greenery involves install green roofs and facades onto bldgs and enhancing microclimatic effects
Exmpls of Bldg Greenery?
Green roof and Vertical Garden (Green Walls)
Types of GReen Roofs
Extensive (15cm , once a year) , Semi-intensive (16-20 cm - limited maintnc.), intensive (high maint.)
Types of VGs? (Vertical Greens)
Green Facade (planted on the ground, grows up the bldg) - Living Walls (vegetation directly on the structure, use of perennials, grass and small shrubs are used instead of climbing plants)
Types of PVs
Monocrystalline silicon cells: high eff. durable and expensive
Polycrystalline silicon cells: less eff. less exp.
Transparent thin-film cells: less exp. lower eff. but flexbl installation
How are the third generation of PVs are made?
Have laser cut holes for shading or transparent effect
What’s advantage of combining PV and Green Roofs?
- reduce bldg energy use for PVs through GR
- protection of plants from cold in winter
- better utilization of roof space
- reduce carbon production/emission’
- renewable energy production
- growth of plants and vegetations
Methods to implement PV-Green Roof?
- low heigh plants and shallow subtrates
- use Intensive GR systems (min. dist of 60 cm between panel and the plant)
- cooling effect is relavant to the distance between (PV and Air Velocity)
- Dry substrate has no cooling effect
