The model could serve as a blueprint for similar efforts across the country.
“The model is designed to evaluate the amount of nitrogen and phosphorus found in stormwater runoff from residential and commercial developments – particularly runoff from a completed project, not a site that is under construction,” says Dr. Bill Hunt, an associate professor and extension specialist of biological and agricultural engineering at NC State who helped develop the model. “To comply with regional water-quality regulations, cities and counties have to account for nutrient loads,” Hunt says, “but the existing tools are antiquated and aren’t giving us sufficiently accurate data.”
The researchers developed the model using chemical, physical and land-use data specific to North Carolina and surrounding states. This allowed them to account for regional conditions, which will improve the model’s accuracy. “Because the model uses regional data, it could be modified easily for use east of the Blue Ridge Mountains in North Carolina and adjoining states,” Hunt says.
The model could also serve as a blueprint for similar efforts nationally. “The primary obstacle to applying this model outside North Carolina – in Florida or Colorado, for example – would be collecting relevant data from those areas and incorporating it into the model’s framework,” Hunt says. “The actual model itself would be fairly easy to modify.”
State and local government officials, as well as developers, can plug proposed development plans into the model and get an accurate estimate of the level of nutrients that would likely be included in stormwater runoff from the completed development site. This would give officials key data that they can use to determine whether a proposed development project should be allowed to move forward or require additional stormwater treatment.
The model was designed in response to state regulations limiting the amount of nutrients that can flow into Jordan Lake in central North Carolina. The regulations affect a host of North Carolina municipalities, including Durham, Greensboro, Chapel Hill, Cary and Chatham County.
In addition to its long-term applications elsewhere, the model will likely be used to help implement forthcoming stormwater treatment requirements for North Carolina’s Falls Lake Watershed.
The model will be unveiled July 23 at a workshop on stormwater controls to be held at NC State’s McKimmon Center on the university’s Raleigh campus. The model was developed by Hunt, NC State biological and agricultural engineering extension associate Kathy DeBusk, and Rich Gannon of the North Carolina Department of Environment and Natural Resources (NCDENR). The work was funded by a grant from NCDENR and was completed with assistance from the Center for Watershed Protection.
NC State’s Department of Biological and Agricultural Engineering is a joint department of the university’s College of Engineering and College of Agriculture and Life Sciences.
Matt Shipman | EurekAlert!
Listening in: Acoustic monitoring devices detect illegal hunting and logging
14.12.2017 | Gesellschaft für Ökologie e.V.
How fires are changing the tundra’s face
12.12.2017 | Gesellschaft für Ökologie e.V.
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences