Great Article at NYTimes.com "Making Every Drop Count"
http://www.nytimes.com/2011/08/25/garden/prairie-grass-landscapes-in-austin-tex.html?pagewanted=1&hpw
"WITH 70 days of 100-plus temperatures so far and no rain in sight, Austin is in the grip of its worst one-year drought on record. And gardeners are quickly finding out which plants can survive brutal heat and drought.
Native trees like cedar elms and hackberries are dropping their leaves. Ash junipers in the Hill Country are dying. Shallow-rooted azaleas and crape myrtles are toast, and most lawns are brown, except for those watered by private wells.
Animals are suffering, too. Coyotes and rabbits are showing up in city gardens in search of water and food. Hummingbirds can’t find nectar because many plants aren’t flowering.
The first week of August, when daily temperatures climbed to 107 or so, a bison escaped from a ranch in Manchaca, on the southwest side of the city, and wandered into the Lady Bird Johnson Wildflower Center seven miles away, where it spent several days grazing in the savanna grasslands.
Gardeners are embracing those prairie grasses with equal enthusiasm because of their heat and drought tolerance. These natives can be found in many of the city’s lawns, ornamental gardens and even green roofs. Remarkably, these deep-rooted plants can adjust to shallow soils, helping to cool houses and absorb rain — when there is some.
“If we get a rain, these grasses will all turn green,” said Lars Stanley, 59, an architect and metal artist, standing on a roof planted with natives that covers the studio he built in East Austin with his wife, Lauren Woodward Stanley, 45, an architect. “It reduces our cooling level immensely.”
The grasses (blue grama, curly mesquite, little bluestem and sideoats grama) go dormant in a drought, a survival strategy that keeps their roots alive. But the prickly pear and Texas sedum the Stanleys planted, succulents that store water in their fleshy pads, looked remarkably fine. " more at link above....
Friday, August 26, 2011
Monday, August 1, 2011
Norman's Water Quality Protection Zone
The city of Norman has released the Storm Water Master Plan which they have been working on since 2005 when they hired PBS&G to do research on how to improve water quality problems to prevent water erosion. The Storm Water Master Plan recommended that the City enact regulations that would provide buffers around the streams and Lake Thunderbird Watersheds as part of the overall effort to improve water quality.Most of Norman’s drinking water is collected from Thunderbird Lake. The contamination in this lake has been linked with the city’s water sheds as well as the general runoff from the Lake’s surrounding area. Therefore, the city has created a new ordinance which will reduce contamination from construction site around these areas.
As of June 28th 2011, the city amended and passed a new ordinance to protect land around the lake as well as officially adopted the Storm Water Master Plan. The ordinance that did pass has been called a “watered down” version of the original and it went into effect of July 28th. The second ordinance dealt with the Water Quality Protection Zone (WQPZ) and would have involved a zoning overlay of Norman. The zoning ordinance did not pass and according to the city of Norman they “have no immediate plan” to discuss it in the future.
Only half of Lake Thunderbird is in Norman’s jurisdiction. With the amount of protests to the new ordinance, it seems that the people of Norman are forgetting the final goal and focusing on the new restrictions and cost instead of the major benefits. This focus on water quality is a new idea but will hopefully create change for the better in other cities as well. “The Norman City Council’s move to protect water quality in Lake Thunderbird will put pressure on Oklahoma City and Moore to enact similar policies. Any new law or resolution draws attention to the unsafe levels of toxins in our drinking water. So the Water Quality Protection Zone (WQPZ) enacted by the Norman City Council is not just a move that reduces the pollution Norman is responsible for — it also is a necessary first step to improving water quality to tolerable levels.” – The OU Daily
The WQPZ is typically a strip of land on a larger parcel that abuts a stream. The new regulations only affect property that have plans to be developed in the future, and are located in the Lake Thunderbird watershed, and contain a stream or designated floodplain. The plan is meant mainly to protect Lake Thunderbird. It does not give the government permission to take away land as rumored, but the new ordinance does force those wanting to develop areas around the lake within the previously described land to ask for permission.
THINGS YOU SHOULD KNOW ABOUT THE ISSUE:
Thunderbird Lake provides 75% of Norman’s drinking water as well as drinking water for Del City and Midwest City.
The Lake has been classified as “impaired” by the Oklahoma Department of Environmental Quality. It has been reported that levels of chlorophyll-A are seven times greater than regulation standards. It has further been reported that the elevated amounts of nitrogen, phosphorus, dissolved solids and sediment put the Lake at risk of developing algal toxins that threaten public health and recreational uses.
The lake is Eutrophic.
---This means, the lake has a high concentration of nutrients, particularly Nitrogen and Phosphorus, which promote excessive growth of algae. High levels of algae also cause taste and odor problems for our drinking water. To add to the problem, when the algae dies and decomposes, it depletes oxygen in the water and can cause fish kills.
A way you can help is to make sure nothing goes down a storm drain other than rain.
---Storm Drains are the drains commonly seen on the side of street everywhere from neighborhoods to busy streets.
A common misconception about the recently passed ordinance is that the government can take your land without compensation. This is completely false.
---Some see the restriction of developing land as a violation of the right to property but in no way is the City of Norman confiscating land. It is more similar to a utility easement, which limits the types of development that can occur on a piece of land.
The City of Norman has a permit from the state which requires the state to reduce pollution in storm water runoff. In addition to requirements that they regulate runoff from construction sites, reduce pollution from City operations and remove illegal connections to the storm sewer. They also must have a program to inform the public (you) about things they can do to reduce storm water pollution.
If you would like any additional information here is the City of Norman's web page for the issue:
http://www.ci.norman.ok.us/content/storm-water-master-plan
As of June 28th 2011, the city amended and passed a new ordinance to protect land around the lake as well as officially adopted the Storm Water Master Plan. The ordinance that did pass has been called a “watered down” version of the original and it went into effect of July 28th. The second ordinance dealt with the Water Quality Protection Zone (WQPZ) and would have involved a zoning overlay of Norman. The zoning ordinance did not pass and according to the city of Norman they “have no immediate plan” to discuss it in the future.
Only half of Lake Thunderbird is in Norman’s jurisdiction. With the amount of protests to the new ordinance, it seems that the people of Norman are forgetting the final goal and focusing on the new restrictions and cost instead of the major benefits. This focus on water quality is a new idea but will hopefully create change for the better in other cities as well. “The Norman City Council’s move to protect water quality in Lake Thunderbird will put pressure on Oklahoma City and Moore to enact similar policies. Any new law or resolution draws attention to the unsafe levels of toxins in our drinking water. So the Water Quality Protection Zone (WQPZ) enacted by the Norman City Council is not just a move that reduces the pollution Norman is responsible for — it also is a necessary first step to improving water quality to tolerable levels.” – The OU Daily
The WQPZ is typically a strip of land on a larger parcel that abuts a stream. The new regulations only affect property that have plans to be developed in the future, and are located in the Lake Thunderbird watershed, and contain a stream or designated floodplain. The plan is meant mainly to protect Lake Thunderbird. It does not give the government permission to take away land as rumored, but the new ordinance does force those wanting to develop areas around the lake within the previously described land to ask for permission.
THINGS YOU SHOULD KNOW ABOUT THE ISSUE:
Thunderbird Lake provides 75% of Norman’s drinking water as well as drinking water for Del City and Midwest City.
The Lake has been classified as “impaired” by the Oklahoma Department of Environmental Quality. It has been reported that levels of chlorophyll-A are seven times greater than regulation standards. It has further been reported that the elevated amounts of nitrogen, phosphorus, dissolved solids and sediment put the Lake at risk of developing algal toxins that threaten public health and recreational uses.
The lake is Eutrophic.
---This means, the lake has a high concentration of nutrients, particularly Nitrogen and Phosphorus, which promote excessive growth of algae. High levels of algae also cause taste and odor problems for our drinking water. To add to the problem, when the algae dies and decomposes, it depletes oxygen in the water and can cause fish kills.
A way you can help is to make sure nothing goes down a storm drain other than rain.
---Storm Drains are the drains commonly seen on the side of street everywhere from neighborhoods to busy streets.
A common misconception about the recently passed ordinance is that the government can take your land without compensation. This is completely false.
---Some see the restriction of developing land as a violation of the right to property but in no way is the City of Norman confiscating land. It is more similar to a utility easement, which limits the types of development that can occur on a piece of land.
The City of Norman has a permit from the state which requires the state to reduce pollution in storm water runoff. In addition to requirements that they regulate runoff from construction sites, reduce pollution from City operations and remove illegal connections to the storm sewer. They also must have a program to inform the public (you) about things they can do to reduce storm water pollution.
If you would like any additional information here is the City of Norman's web page for the issue:
http://www.ci.norman.ok.us/content/storm-water-master-plan
Thursday, July 28, 2011
New Contruction Turbidity Standards
Land and Water Magazine: Reducing Turbidity, ELG’s, and Compost-Based BMPs
Summary
The final rule for the US EPA Effluent Limitation Guideline for the Construction and Development Industry (40 CFR Part 450 of the Federal Register) went into effect in February 2010. The new rule creates storm water quality performance standards for soil disturbance on construction sites 10 acres or greater. The land owner will be required to monitor and report the daily average nephelometric turbidity (NTU) from waters discharged from the construction site. The turbidity standard (numerical limit) to trigger a violation was originally 280 NTUs.
Under the current rule, the US EPA will begin enforcement on construction sites with a total active soil disturbance of 20 acres of 20 acres or greater as of August 2011. Sites that disturb 10 acres or greater will undergo active enforcement starting February 2014. For large developments this includes the sum total area of disturbance at any given time, including small sections under the acre limit.
Effluent Limitation Guideline (ELG) states the permitted party must report the daily average turbidity from all site storm water discharge areas. A violation will only occur if the daily average exceeds the NTU threshold, whereas, one reading in breach of the NTU limit does not constitute a violation. Also, if the 2yr 24hr storm event is surpassed for the local area where the construction site is located, the turbidity standard will not be enforced.
Storm water sampling frequency, number of daily samples required, sampling methodology, sampling equipment, method of measurement, and reporting method is up to the local permitting authority. Although, the US EPA will likely release a guidance document which will likely steer the permitting authorities.
The Final Rule does not dictate what type of best management practices can be used as the US EPA does not want to limit strategies that may help permitted parties comply with the new rule. They estimate that full enforcement and compliance with the new rule will encompass 73% of construction site soil disturbance nationally and should reduce annual sediment discharges from construction sites by 77%
For those with sites of 20 acres or greater, this rule will be effecting you very soon. The new standards have been described as strict and depending on the site type may be difficult to comply with. Remember that the owner is in-charge of reporting the daily average NTU, and should also be considering ways to reduce the turbidity level to keep it under limitations. The link below gives an article which includes suggestions for reducing turbidity levels: http://viewer.zmags.com/publication/f15cb27c#/f15cb27c/24
Friday, July 8, 2011
EPA Launches Green Infrastructure Strategy
WASHINGTON – The U.S. Environmental Protection Agency (EPA) is launching a new strategy to promote the use of green infrastructure by cities and towns to reduce stormwater runoff that pollutes our nation’s streams, creeks, rivers, lakes and coastal waters. Green infrastructure decreases pollution to local waterways by treating rain where it falls and keeping polluted stormwater from entering sewer systems. In addition to protecting Americans’ health by decreasing water pollution, green infrastructure provides many community benefits including increased economic activity and neighborhood revitalization, job creation, energy savings and increased recreational and green space.
“Through this agenda, we’ll help cities and towns across the nation clean up their waters and strengthen their communities by supporting and expanding green infrastructure,” said Deputy Administrator Bob Perciasepe, who announced the agenda at a Green Street, Green Jobs conference focused on fostering green infrastructure in the Washington, DC metropolitan area. “Green infrastructure changes improve the health of our waters while creating local jobs, saving communities money and making them healthier and more prosperous places to raise a family and start a business.”
Stormwater is one of the most widespread challenges to water quality in the nation. Large volumes of polluted stormwater degrade our nation’s rivers, lakes and aquatic habitats and contribute to downstream flooding. Green infrastructure captures and filters pollutants by passing stormwater through soils and retaining it on site. Effective green infrastructure tools and techniques include green roofs, permeable materials, alternative designs for streets and buildings, trees, rain gardens and rain harvesting systems.
As part of the strategy, EPA will work with partners including local governments, watershed groups, tribes and others in 10 cities that have utilized green infrastructure and have plans for additional projects. EPA will encourage and support expanded use of green infrastructure in these cities and highlight them as models for other municipalities around the country. The 10 cities are: Austin, Texas; Boston, Mass.; Cleveland, Ohio; Denver, Colo.; Jacksonville, Fla.; Kansas City, Mo.; Los Angeles, Calif.; Puyallup, Wash.; Syracuse, N.Y.; and Washington, DC and neighboring Anacostia Watershed communities.
Energy savings is one of the greatest benefits of green infrastructure. On and around buildings, green infrastructure can reduce heating and cooling costs. For example, green roofs reduce a building’s energy costs by 10 to 15 percent, and an additional 10 percent of urban tree canopy can provide 5 to 10 percent energy savings from shading and windblocking. Green infrastructure also conserves energy by reducing the amount of stormwater entering combined collection and treatment systems, which reduces the amount of wastewater processed at treatment plants.
EPA will continue to work with other federal agencies, state and local governments, tribes, municipalities, and the private sector to identify opportunities for using green infrastructure and provide assistance to communities implementing green approaches to control stormwater. EPA will also provide additional tools to help states and communities leverage green infrastructure opportunities within other innovative environmental projects.
For more information on EPA’s green infrastructure agenda: http://epa.gov/greeninfrastructure
“Through this agenda, we’ll help cities and towns across the nation clean up their waters and strengthen their communities by supporting and expanding green infrastructure,” said Deputy Administrator Bob Perciasepe, who announced the agenda at a Green Street, Green Jobs conference focused on fostering green infrastructure in the Washington, DC metropolitan area. “Green infrastructure changes improve the health of our waters while creating local jobs, saving communities money and making them healthier and more prosperous places to raise a family and start a business.”
Stormwater is one of the most widespread challenges to water quality in the nation. Large volumes of polluted stormwater degrade our nation’s rivers, lakes and aquatic habitats and contribute to downstream flooding. Green infrastructure captures and filters pollutants by passing stormwater through soils and retaining it on site. Effective green infrastructure tools and techniques include green roofs, permeable materials, alternative designs for streets and buildings, trees, rain gardens and rain harvesting systems.
As part of the strategy, EPA will work with partners including local governments, watershed groups, tribes and others in 10 cities that have utilized green infrastructure and have plans for additional projects. EPA will encourage and support expanded use of green infrastructure in these cities and highlight them as models for other municipalities around the country. The 10 cities are: Austin, Texas; Boston, Mass.; Cleveland, Ohio; Denver, Colo.; Jacksonville, Fla.; Kansas City, Mo.; Los Angeles, Calif.; Puyallup, Wash.; Syracuse, N.Y.; and Washington, DC and neighboring Anacostia Watershed communities.
Energy savings is one of the greatest benefits of green infrastructure. On and around buildings, green infrastructure can reduce heating and cooling costs. For example, green roofs reduce a building’s energy costs by 10 to 15 percent, and an additional 10 percent of urban tree canopy can provide 5 to 10 percent energy savings from shading and windblocking. Green infrastructure also conserves energy by reducing the amount of stormwater entering combined collection and treatment systems, which reduces the amount of wastewater processed at treatment plants.
EPA will continue to work with other federal agencies, state and local governments, tribes, municipalities, and the private sector to identify opportunities for using green infrastructure and provide assistance to communities implementing green approaches to control stormwater. EPA will also provide additional tools to help states and communities leverage green infrastructure opportunities within other innovative environmental projects.
For more information on EPA’s green infrastructure agenda: http://epa.gov/greeninfrastructure
Friday, July 1, 2011
Green Roof for Tulsa City-County Central Library!
The Tulsa City-County Central Library, constructed in 1965, formerly included two reflecting pools flanking the main library entrance. The reflecting pools were built over an underground parking structure - and over time -the pools began to leak, damaging cars and creating a hazard. And so, the pools were emptied and sat abandoned for years. They became an eyesore, and a maintenance issue.
The library evaluate using the former pools as landscaping, but faced challenges due to soil loads on the parking structure roof. But, observing rooftop gardens, they began to see other opportunities for reuse.
After consultation with structural engineers, the library confirmed that a roof system would be feasible. The project was fully funded by the American Recovery and Reinvestment Act "Green Project Reserve" adminstered by the Oklahoma Water Resources Board.
The first step was to remove the old terrazzo and install a new waterproof membrane to correct leakage problems. The next step was to add insulation and a root-stop barrier. The bottom white later is styrofoam insulation, which was also helped to raise the bed.
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Next, a moisture retention layer was added. This was critical due to the long, hot, dry summer in Tulsa as well as the garden's location on a southern exposure. Roof top gardens often also have moisture loss from constant winds. Rather than using soil, LiteTop(r) growing media was utilized to help minimize weight.
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The library evaluate using the former pools as landscaping, but faced challenges due to soil loads on the parking structure roof. But, observing rooftop gardens, they began to see other opportunities for reuse.
After consultation with structural engineers, the library confirmed that a roof system would be feasible. The project was fully funded by the American Recovery and Reinvestment Act "Green Project Reserve" adminstered by the Oklahoma Water Resources Board.
The first step was to remove the old terrazzo and install a new waterproof membrane to correct leakage problems. The next step was to add insulation and a root-stop barrier. The bottom white later is styrofoam insulation, which was also helped to raise the bed.
Next, a moisture retention layer was added. This was critical due to the long, hot, dry summer in Tulsa as well as the garden's location on a southern exposure. Roof top gardens often also have moisture loss from constant winds. Rather than using soil, LiteTop(r) growing media was utilized to help minimize weight.
Plants were chosen to minimize the need for irrigation and maintenance. A drip irrigation system was installed to assure plant survival while minimizing water consumption. The landscaping design was developed specifically to deter misuse or vandalism of the beds. The final installation is an attractive as well as educational addition to the library. Along with overall beautification, the library has seen a decrease in the amount of abuse and litter in the surrounding plaza.
Monday, June 20, 2011
Last year the Tulsa City-County Library System received two grants to install green stormwater management systems. We have recieved a presentation from the Library showing the sites, design elements, and final products for both installations and will be posting them here. Go by and check these out yourself!
The first is at the Judy Z. Kishner Library, located in a Sperry, OK. The library was completed in 2008 and lies in a two acre lot adjacent to the Osage Trail. Nearly the entire town, along with areas to the north, is prone to flooding. The contours and elevations of the library property did not allow positive drainage off the site and were a mosquito haven.
Since draining the water was not an option for this property, the idea of a rain garden took shape.To fund this project, the Library applied for a grant from the Amercina Recovery and Reinvestment ‘Project Green Reserve’ administred by the Oklahoma Water Resources Board. Due to the innovative nature of this problem resolution, the project was fully funded with the Green Reserve Grant Funds.
During construction, the existing surface depression was excavated further and the soil amended. New vegetation, selected to enjoy the wet conditions, was planted. The finished result is an amenity for the library and the nearby trail as well as a stormwater management feature.
Thursday, February 3, 2011
TulsaPartners Raingarden - Plant Selection
Shown to the left are plant descriptions for several of the varieties we used in the TulsaPartners' raingarden. You'll notice most of the descriptions feature a butterfly sticker, which indicates that they attach pollinators, like butterflies. You may also notice that we generally selected 1 gallon (1#) container sizes, which are lower priced, but generally fill out well within a season or two.
Color. Because the building is a light yellow and there are already lavender flowing plants present (a lilac bush sits just behind the raingarden), we kept with that theme and selected plants that would have lavender or yellow flowers. Because the building is surrounded by an evergreen hedge, which also forms the garden's backdrop, we didn't invest in additional evergreen material.
Moisture Tolerance. In general, plants in the deepest section of the garden will have the greatest depth and duration of inundation, so these plants should be water-loving or wetland-type plants. For this garden, we looked around the building for plants that were already present and found an overgrown clump of purple irises, which do well in wet soil. In addition, they are vertical plant and wouldn't get lost due to height. Some of these were transplanted into the deepest part of the garden. In the middle zone, we planted another popular lavender flowing plant, garden phlox, along with a yellow flowering plant, Helianthus. Both tolerate moderate levels of inundation but also do well with direct sun and periods of drought. In the back, which is the driest part of the garden, we planted Russian sage and Little Joe Pye Weed. The "Little" is important because a normal Joe Pye Weed would take up almost all of a garden this size!
With Spring just around the corner, I'm looking forward to seeing how these plants have handled the long dry fall that followed their installation. Stay tuned for more photos!
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