Florida Forebay Wetland Cleans Stormwater and Provides Landscape

Our Stormscrubber wetland has passed its eighteen month install date anniversary and still providing successful stormwater treatment, storage and landscape credit.

We installed the StormScrubber in May 2009 on the site of an unscale cafe in the Springfield Historic restoration district in Jacksonville, Florida.

The prior to the install, the site had serious flooding and stormwater problems.

The StormScrubber Wetland solved the stormater runoff issue and provided landscape beauty and credit all in  one package.

The site presented several significant issues.  There was the potential for system clogging because of the sandy and silty nature of the soils.  A permeable paver system using historic bricks was installed to direct the stormwater into the wetland system.

The wetland was planted with Florida native species that could tolerate both innundation and drought.

The wetland system incorporates a special self pruning system to keep roots from filling up the infiltration-void storage chamber.


To date the StormScrubber has preformed as expected, cleaning runoff, storing the rainwater underground and using the collected stormwater to irrigate teh landscape feature plant species.

The new paradigm in site design is the combination of landscape units with rainwater storage.  Call us today for more information on how Green and Sustainable BMPs can help maximize your project's design efficiency.

StormScrubber 2009

StormScrubber 2010

Modular RainWater Harvesting Systems - Cost-Effective BMP

EcoRain Underground Rainwater Harvesting System

Blog Post on Stormwater Harvesting Reprinted from the Green Roof Blog

We've talked about water crises and irrigation of green roofs many times before.  Designing a green roof irrigation system to run off of rainwater instead of potable water is easy.

One of the biggest disadvantages of large rainwater tanks before has been the freight expense of bringing a large tank from the manufacturer to the site.

Many times the cost of freight exceeded the cost of the tank - and there are not many tank manufacturers so the tanks may have had to been hauled across the country.  Long freight hauls create large carbon footprints.

However, several new structural Rainwater Harvesting Systems are now available on the market that are collapsable and can easily be assembled on-site.  For a video of a very large underground rainwater collection system in Dallas, Texas click here (opens in a new window).

Rainwater Harvesting Design

One of the more green subdivisions in Gainesville, Florida, the Madera Subdivision, utilizes underground collection and storage of stormwater in several of their homes.

Collection of rainwater and subsequent irrigation of green roofs can be a valid method for allowing larger buildings on Urban Core lots previously designed with much smaller impervious allotment.  This applies also to historic residential areas where renovations are occurring.

Importantly, the Green Roof design needs to anticipate periods of natural drought where stored rainwater may be depleted.

The use of potable water should be only used in certain instances, and the green roof plant selection should reflect species that can utilize the stored rainwater, however are also drought tolerant.

EcoRain Underground Rainwater Harvesting

Typical Underground Rainwater Storage Systems for Green Roof irrigation are designed and installed with little effort.

First the seasonal high groundwater level should be determined.  This can be accomplished with the civil engineer or geotechnical expert.  For the homeowner, simply take a shovel, I prefer a set of post hole-diggers, and dig a small hole down until wet soil or water appears.

The Green Roof Underground Stormwater Harvesting System should be primarily installed above the Seasonal High Ground Water Level.

Size your storage system to hold a 24-hour storm event quantity for the surface area of the roof you are collecting from.  ARCSA has a great website about sizing and designing systems - click here - opens in a new window.

Modular Rainwater Storage Tank

You can use solar pumps to pump the water back up from the rainwater harvesting cistern to the green roof.


Remember, we a growing population on this globe and conservation of all water resources is important.  Ensure your green roof plant designer is using species that are friendly to conservation of water!

Typical Rainwater Harvesting System

As always, feel free to contact us with your questions!

Typha - Cattails, Stormwater Ponds, Roundup, Nutrients In-Nutrients Out

Killing cattails, Typha latifolia with roundup in a sormwater pond and leaving the plants int he pond to decompose is a sure-fire way of being obvious about not understanding nutrient removal (Nitrogen and Phosphorous) and other pollutants from a stormwater facility.

How often have you seen vast stretches of cattails killed by the action of Roundup's active ingredient - Glyphosate - "GLY-PHO-SATE".

Monsanto has often spoke of the safety of Roundup and I've even seen Roundup representatives drinking the diluted mixture.

Does a wicked job on plants though.

Cattails are a pioneer species and quite persistent in their growth patterns being classified as noxious by many agencies though they are a native species here in Florida.

Cattails are one of the most efficient species at uptaking pollutant nutrients such as nitrogen and phosphorous. Typha is also an excellent mechanism for removal of heavy metals and other contaminants from stormwater.

So here in Florida -and elsewhere - by the time Typha is killed back by the frost, Roundup or reaches maturity as a plant, large quantities of pollutants have been removed from stormwater and sequestered in the plants biomass.

It is in this part of the equation where we need to break the cycle of Nutrients In Nutrients Out.

Take roundup, kill the cattails - let them fall back into the pond and all the heavy metals, nitrogen, phosphorous, oils and greases and other contaminants are soon released right back into the water.

Roundup use concentrates nutrient and pollutant concentrations in stormwater ponds.

Typha and Algae blooms react the same way to the Nutrients In Nutrients Out equation.

Plants are efficient at removing pollutants and cleaning water.

Yet if the plants are killed and allowed to decay in the pond, then all the pollutants and nutrients are re-released right back into the waterbody.

The Nutrients In Nutrients Out cycle must be broken to finally clean stormwater.

Harvesting Typha and removing the species from stormwater ponds is the best long term answer to nutrient removal.

The cattails can then be composted and, after Toxicity characteristic leaching procedure tests (TCLP) the composted biomass can be used as mulch or nutrient rich fertilizer.

Understanding the Nutrients In Nutrients Out cycle is critical to effective and sustainable control of stormwater pollution.

Copper Sulfate and Glyphosate have their rightful place.

To keep ponds sustainable clean - their must also include a Nutrients Out component.

Your thoughts and comments are always appreciated!

Kevin

Stormwater and Arboriculture - Cypress Landscapes for Stormwater Ponds, Habitat, Traffic and more!

Stormwater Landscaping with Cypress Trees

Stormwater ponds function better with appropriate landscapes such as the cypress trees depicted in the photo to the left.

Many here in Florida argue that stormwater ponds should be free and clear of vegetation.  Some of their arguments include lines of reasoning such as;

• Stormwater ponds are polluted and plants attract wildlife that in turn could be harmed by the polluted water
• However regardless of plants or no plants, wildlife come to stormwater ponds anyway
• Here in Florida woodstorks and sandhill cranes are often seen fishing around stormwater ponds

Importantly, plants around stormwater ponds help clean the stormwater and provide a host of other benefits.

Cypress, Taxodium spp., is especially a good tree to plant around stormwater facilities.

Reasons I choose Cypress as the number one Florida Stormwater species are;

• Cypress is a native Florida plant
• Cypress has a low leaf litter rate - THIS IS IMPORTANT
• other wetland species native to Florida, such as Blackgum, Nyssa spp. contribute enormous amounts of leaf litter to the stormwater pond, rapidly filling up the volume and requiring significant maintenance
• Cypress provides important habitat for wildlife including - 
• Communal habitat, and
• Foraging habitat
• Cypress can be pruned easily for safety
• Refer to the above photo of the stormwater pond adjacent a heavily traveled intersection.
• The lower limbs of the Cypress can be pruned high enough to allow drivers to possess a safe range of view and see automobiles approaching in other directions.
• Cypress tolerates drought - long periods once established
• Cypress tolerates innundation
• Cypress grows well in modular wetlands
• Cypress contributes towards volume recovery - did you know the Florida water management districts allow for recovery efficiencies from evapotranspiration?  See Chapter 40C-42 SJRWMD and others.

All in all - Cypress is the best plant for sustainable stormwater systems in Florida!

Kevin

Florida Underground Stormwater Systems, LEED Compliant, Made in USA and Cost-Effective

EcoRain Underground stormwater systems are a great way to integrate stormwater systems underground and into your site's parking area and landscape areas.

Storm Drain Filter Made From Groundcloth - Innovations On-Site

The photo below was taken along a road in Jacksonville, Florida where the contractor had installed a new water supply line.

During construction the existing sidewalk and asphalt road edge were excavated, along with dirt from the water supply line trench.

After the new supply line was installed, the dirt, rock and debris covered the surface.

Normally a contractor would plant rye-grass, clover or some other fast-growing cover crop to prevent erosion and stabilize the ground.

Apparently the surface stabilization did not occur as vegetation was not present.  However it may have been unsuccessfully attempted as the area is in the middle of a five week drought and with zero irrigation available the seeds may not have sprouted.  Sod was not installed.

The area is important as it lies adjacent the St. Johns River.  Any discharge of silt and trash to the storm sewer would be a direct discharge to either a tributary to or the St. John's River itself.

The contractor deserves credit though for an innovative approach to erosion prevention.

Protecting Stormwater Drains from Pollution

Granted the drain appears to be on the verge of becoming overwhelmed with siltation and gravel, but as I looked into the cover, the fabric - the ground cover was a heavier weight allowing for water to run through while preventing trash from entering the sewer system - the fabric was still intact.

There are obvious disadvantages to this system.

However first of all, the fabric is doing what it was intended to do - keep debris and silt out of the stormwater system.

Yet it may be overwhelmed with the volume of silt.

How strong is the fabric and how long will it last?

If the fabric is strong enough to hold up during a heavy rain, will it clog and back up, causing a potential safety hazard with ponding in the road?

Is the fabric a better and safer approach than say an Erosion Eel or other type of barrier?

We will keep photos posted as rain events occur.

Your comments and thoughts are welcome.

Kevin

Floating Wetlands Offer Many Benefits - Efficiency Testing at UF

Floating wetlands have been discussed here before.  They clean stormwater, provide significant wildlife habitat and create beauty.

The photo below was taken Wednesday, October 20th and is of a test platform in Gainesville, Florida where the University of Florida is conducting tests on the system.

The white barrier around the Floating Wetland isolates the water column and allows for analysis of the water immediately adjacent the system and system roots.

For more information on floating wetland systems, contact us today.

Floating Wetland - Testing for Water Quality