We have curated several informative and entertaining news stories from the stormwater industry, as well as a few other items of interest. We appreciate you taking the time to read our ezine and hope that you find this stormwater related information as interesting and informative as we do.
Until next month, please work safe and stay well.
The Construction EcoServices Staff
“What we find is that, even in states where the long-term mean precipitation hasn’t changed, in most cases the wettest events have intensified, increasing the financial damages relative to what would have occurred without the changes in precipitation,” said Davenport, who received a Stanford Interdisciplinary Graduate Fellowship in 2020. The researchers emphasize that, by providing a new quantification of the scale of the financial costs of climate change, their findings have implications beyond flooding in the U.S.
“Overall, we found that high levels of nutrients affect streams and rivers everywhere,” said the study’s lead author Marcelo Ardón, associate professor of forestry and environmental resources at North Carolina State University. “Wherever we looked, we saw increases in the abundance and biomass of organisms that live in streams, and also the speeding up of processes that happen in streams – how fast algae grow, how fast leaves decompose, and how fast organisms grow that feed on them.”
Though this comprehensive effort to identity and address flooding risks is unprecedented, Texas does have experience with pervasive water issues. It’s just that the state usually deals with a lack of source water, not the sudden appearance of too much. “While this type of long-term planning is the norm for ensuring that Texas cities have an adequate water supply, this is the first time the same rigor is being applied to flood planning and mapping,” the Star-Telegram reported. “That’s a significant demonstration of the state’s commitment to addressing the complexity of flooding issues.”
Marsooli and colleagues found that the historical 100-year flood level would become a nine-year flood level by mid-century (2030-2050) and a one-year flood level by late 21st century (2080-2100). Most recently reached by Superstorm Sandy, 500-year flood levels would become 143-year flood levels by mid-century and 4-year flood levels by the end of the century. Sea level rise would result in larger waves, which could lead to more flood hazards such as erosion and damage to coastal infrastructure.
SPECIAL NEW BULLETIN
City of Houston 2021 Stormwater Detention Regulation Changes
On January 4, 2021 the City of Houston replaced within Chapter 9 of the Infrastructure Design Manual (IDM) how stormwater detention is calculated within the City of Houston. This was announced on January 20th, 2021 and was to go into effect on February 4th, 2021, sending developers and engineers into a frenzy to get projects submitted to the county by the deadline. On January 26th, that deadline was pushed back to March 31st, 2021.
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FEATURED VIDEO CASE STUDY
STORMWATER SHORTS: Automated Batch Detention
In this video, we are taking a look at a 40-acre residential community development project in Central Texas. The development is split into two main sections, each with a detention pond using a innovative automated batch detention system called smartPOND. Construction EcoServices Vice President, David Batts, narrates on-site at the project during a day of installation and testing of the system.
FEATURED CASE STUDY
You Can’t Have a Park Without the Trees
The design team at Ten Eyck wanted a solution to provide enough soil volume so that each tree could reach its full maturity and life expectancy. Structural soil cells from CityGreen, called Stratavault, were chosen to provide 50,000 CF of soil for all the trees in the park. Stratavault is a modular design that provides structural support for pavement surfaces and creates a soil matrix of healthy, uncompacted soil. Just like every other construction project, designers are tasked with creating a design that meets their intent, but also keeping construction costs low.
Roots & Street Trees Management System
The open, skeletal structure of the Stratavault matrix provides an optimal growth zone for tree roots. In excess of 90% of the total volume is available for tree root growth. Stratavault has very generous apertures for root growth, without sacrificing the structural integrity of the matric. Stratavault apertures are large enough to permit some common conduits, services pipes and aeration systems to be incorporate within the structure.
GOOD-TO-KNOW STORMWATER LINGO
- Certified Professional in Erosion and Sediment Control (CPESC)
A Certified Professional in Erosion and Sediment Control (CPESC) embraces the science of surface erosion and sediment control. This practice also specializes in the study and subsequent reduction of the adverse effects of environmental pollutants, whether natural or manmade, as it relates to soil, water, and air.
- Certified Inspector of Sediment and Erosion Control (CISEC)
A Certified Inspector of Sediment and Erosion Control (CISEC), is an individual who has demonstrated his or her proficiency in observing, inspecting and reporting on the implementation of Sediment and Erosion Control Reports and Plans (e.g. SWPPPs and SWQMPs).
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We offer stormwater consulting and value-engineering services, turnkey SWPPP compliance services during construction activity, erosion control solutions for slopes and channels, and post-construction compliance services for stormwater management systems for detention and stormwater quality treatment. Need help? Contact us today.