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LEED: sustain. sites

key terms

Acid Rain precipitation of dilute solutions of strong mineral acids, formed by the mixing in the atmosphere of various indust. pollutants (primarily sulfur dioxide & nitrogen oxide) with naturally occurring oxygen & water vapor.
Alternative Fuel Vehicles vehicles that use low-polluting, non-gasoline fuels, such as electricity, hydrogen, propane or compressed natural gas, liquid natural gas, methanol & ethanol. Also in this category is gas-electric hybrid vehicles.
Biodiversity variety of life in all forms, levels, and combos, including ecosystem diversity, species diversity, and genetic diversity.
Biomass plant material from trees, grasses, or crops that can be converted to heat energy to produce electricity.
Bioswale stormwater control feature that uses a combo of an engineered basin, soils, & vegetation to slow & detain stormwater, increase groundwater recharge, & reduce peak stormwater runoff.
Brownfield previously used or developed land that may be contaminated with hazardous waste or pollution. Once remediated, the land can be reused which provides a good opportunity to restore degraded urban land.
Building Density the floor area of the building divided by the total area of the site (sq. ft. per acre).
Building Footprint area on a project that is used by the building structure, defined by the perimeter of the building plan.
Community Connectivity amount of connection between a site & the surrounding community, measured by proximity of the site to homes, schools, parks, stores, restaurants, medical facilities, & other service and amenities.
Development Density total square footage of all buildings within a particular area, measured in square feet per acre or units per acre.
Diversity of Uses or Housing Types the number of types of spaces or housing types per acre; encourages walking and less of a dependence on personal vehicles. Allows for difference in housing types, sizes, ages and incomes to live in the same neighborhood.
Dry Ponds excavated areas that detain stormwater & slow runoff but are dry between rain events.
Wet Ponds excavated areas that detain stormwater & slow runoff that are designed to hold water all the time.
Floodplain land that is likely to be flooded by a storm of a given size. (i.e. 100 year storm)
Floor-To-Area Ratio relationship between the total building floor area & the allowable land area the building can cover. In green building, the objective is to build up rather than out.
Foot Candle measure of the amount of illumination falling on a surface; is equal to 1 lumen per square foot.
Heat Island Effect absorption of heat by hardscapes, such as dark, nonreflective pavement & buildings and its radiation to surrounding areas.
Imperviousness resistance of a material to penetration by a liquid; this is expressed as a percentage of total land area that does not allow moisture penetration.
Native Plants occur naturally in a given location and ecosystem. Using these can reduce the amount of water required for irrigation, as well as the need for pesticides or fertilizers. Are considered low maintenance and not invasive.
Adapted Plants are not native to a location but grow reliably with minimal attention from humans. Using these can reduce the amount of water required for irrigation, as well as the need for pesticides or fertilizers, & may provide benefits for local wildlife.
Perviousness percentage of the surface area of a paving material that is open and allows moisture to pass through the material & soak into the ground below.
Prime Farmland previously undeveloped land with soil suitable for cultivation of agriculture, needed for food production.
Rain Garden stormwater management feature consisting of an excavated depression and vegetation that collects & filters runoff and reduce peak discharge rates.
Site Disturbance amount of a site that is distributed by construction activity; on undeveloped sites limiting the amount and boundary can protect surrounding habitat.
Solar Reflectance Index (SRI) measure of how well a material rejects solar heat; the index ranges from 0 (least reflective) to 100 (most reflective). Using cooler materials helps prevent the urban heat island effect and minimizes demand for cooling of nearby buildings.
Stormwater Runoff water from precipitation that flows over surfaces into sewer systems or receiving water bodies. All precipitation that leaves project site boundaries on the surface is considered this.
Street Grid Density an indicator of neighborhood density, calculated as the number of centerline miles per square mile.Community with high street density and narrow, interconnected streets more likely to be pedestrian friendly.
Transportation Demand Management the process of reducing peak-period vehicle trips.
Vehicle Miles Traveled (VMT) measure of transportation demand that estimates the travel miles associated with a project, most often for single-passenger cars.
Wetland Vegetation plants that require saturated soils to survive or can tolerate prolonged wet soil conditions.
Xeriscaping landscaping method that makes routine irrigation unnecessary by using drought adaptable and low-water plants as well as soil amendments such as compost and mulches to reduce evaporation.
Created by: kbtwomey
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