Convert site area to include infiltration swales, rain gardens, vegetated filter strips and retention ponds.
Convert site area to include infiltration swales, rain gardens, vegetated filter strips and retention ponds.
For urban buildings with small sites, green roofs and rainwater collection and reuse systems are the most likely strategies to bring the project to compliance with this credit. While it is important to have a professional calculate the required amount of
For urban buildings with small sites, green roofs and rainwater collection and reuse systems are the most likely strategies to bring the project to compliance with this credit. While it is important to have a professional calculate the required amount of vegetated area needed to mitigate 15% of onsite rainfall, a reasonable rule of thumb is that you’ll need to cover at least 20% of the site area with a green roof or other vegetation.
Install green roofs to reduce the runoff coefficient of the roof area.
Install green roofs to reduce the runoff coefficient of the roof area.
Harvest stormwater in tanks and cisterns for reuse. Stormwater may be treated and used for irrigation and indoor uses such as toilet flushing, fire suppression, laundry, and cooling tower make-up water.
Harvest stormwater in tanks and cisterns for reuse. Stormwater may be treated and used for irrigation and indoor uses such as toilet flushing, fire suppression, laundry, and cooling tower make-up water.
Substitute porous paving materials in place of conventional asphalt and concrete. This may require installing a new sub-base and is not as simple as repaving.
Substitute porous paving materials in place of conventional asphalt and concrete. This may require installing a new sub-base and is not as simple as repaving.
Investigate opportunities for increased stormwater mitigation (based on the inventory results) through water harvesting techniques or modifying surface areas to increase the amount of pervious surface.
Investigate opportunities for increased stormwater mitigation (based on the inventory results) through water harvesting techniques or modifying surface areas to increase the amount of pervious surface.
You may use online tools to determine region-specific rainfall amounts. However, since this data is not always readily available online, the best way to track down this information may be to contact your city or county stormwater management officials dire
You may use online tools to determine region-specific rainfall amounts. However, since this data is not always readily available online, the best way to track down this information may be to contact your city or county stormwater management officials directly.
Research region-specific data for the total annual rainfall and the 2-year, 24-hour frequency storm.
Research region-specific data for the total annual rainfall and the 2-year, 24-hour frequency storm. See the getting the stormwater data you need.
If cisterns, detention ponds, or other stormwater collection systems exist on site, assess their capacity and the area of surfaces from which they collect water, based on design documents or other system information.
If cisterns, detention ponds, or other stormwater collection systems exist on site, assess their capacity and the area of surfaces from which they collect water, based on design documents or other system information.
If the project site contains a number of different surface slopes and grades, you can simplify the calculation process by classifying the majority of appropriate surface areas as “steep.” This will generate the most conservative calculation of
If the project site contains a number of different surface slopes and grades, you can simplify the calculation process by classifying the majority of appropriate surface areas as “steep.” This will generate the most conservative calculation of stormwater mitigation.