The reduction of power plant emissions in the mid-Atlantic has improved water quality in the Chesapeake region, according to new research from the University of Maryland Center for Environmental Science (UMCES).
Image courtesy haglundc/Flickr
Researchers at the university’s Appalachian Laboratory have traced improvements in the water quality trends of nine forested watersheds located along the spine of the Appalachian Mountains to the Clean Air Act’s Acid Rain Program. Passed in 1990, the Acid Rain Program led to a 32 percent drop in human-caused nitrogen-oxide emissions in 20 states. As these emissions have declined, so too has the amount of nitrogen found in some Pennsylvania, Maryland and Virginia waterways.
In other words, while the Acid Rain Program only intended to reduce the air pollution that causes acid rain, it had the unintended consequence of reducing the amount of nitrogen oxide particles landing on the region’s forests, thus improving local water quality.
“Improvements in air quality provided benefits to water quality that we were not counting on,” said UMCES President Donald Boesch in a media release.
Once nitrogen oxide particles are emitted into the air, wind and weather can carry them long distances. In time, these particles fall onto the land or into the water. Nitrogen that enters rivers and streams can fuel the growth of algae blooms, which block sunlight from reaching underwater grasses and create low-oxygen “dead zones” that suffocate marine life. Scientists estimate that just over one-third of the nitrogen polluting the Bay comes from the air.
People often feel helpless when confronting the environmental concerns that face us today. They want to know, in simple and straightforward terms, what they can do to help. In the Chesapeake Bay watershed, the answer lies in our work to reduce the flow of nutrients and sediment into our waterways.
While we have made great strides in upgrading nutrient-removal technology at wastewater treatment plants, controlling power plant and automobile exhaust emissions, and putting conservation practices in place on area farms, we have not made as much progress in reducing stormwater runoff from homes and businesses. Rainfall continues to run across rooftops, driveways and lawns, picking up pollutants before it enters storm drains, rivers and streams. And we continue to look for ways to encourage homeowners to reduce their stormwater discharges.
Image courtesy Wisconsin Department of Natural Resources/Flickr
Environmental regulations have not focused on runoff from homes because these pollution sources are too small, diffuse and numerous to manage effectively and efficiently. But the Chesapeake Bay Program is developing a system that will give homeowners credit for reducing their runoff and helping their communities meet the goals of the Total Maximum Daily Load (TMDL), or Bay “pollution diet.” More than 30 stakeholders worked through the Chesapeake Stormwater Network to develop this crediting program, which will respond to the needs of both homeowners and government agencies and provide an accurate mechanism for verifying residential best management practices.
Rain barrels, rain gardens and permeable pavement are just some of the tools that can help a homeowner manage runoff and add color and character to his property. But it is important for us to ensure that these practices are installed correctly to reduce pollution over time. So a guide is in production that will show homeowners how to design, construct and maintain different practices, and an online tool will allow them to add their practices to a website, where the data will be checked and pollution reductions will be calculated.
Training and certification programs are being planned. Smart phone apps are being developed. And this initiative appears to be catching on among homeowners and in communities across the watershed, where people see it as an opportunity to improve their neighborhood, increase their property values and make a positive impact on their local environment and the water quality of the Bay.
Note: The opinions expressed above are those of the author and do not necessarily reflect U.S. EPA policy, endorsement, or action.
Chesapeake Bay Program partners have improved how states track on-farm conservation, helping farmers get credit where it is due and ensuring states know what has been done to meet their pollution reduction goals.
Under the Chesapeake Bay Total Maximum Daily Load (TMDL), or “pollution diet,” each state in the watershed must report their annual progress in promoting agricultural conservation. To streamline this process, the U.S. Geological Survey (USGS) has integrated state and federal data about what conservation practices have been put in place, where. Delaware, Pennsylvania and West Virginia used this new dataset to report their conservation practices in 2012, improving their ability to track their progress toward improving water quality in rivers, streams and the Chesapeake Bay.
While agricultural runoff is one of the watershed’s leading sources of nutrient and sediment pollution, on-farm conservation can lower the amount of nitrogen, phosphorous, sand and silt washing off of farmland. Conservation tillage, cover crops and nutrient management planning can also reduce a farm’s operating costs and improve a farm’s production.
Image courtesy U.S. Department of Agriculture
Indeed, a recent U.S. Department of Agriculture (USDA) report on the impact of cropland conservation in the region showed that conservation measures—a number of them put in place voluntarily and made possible through the Farm Bill—have improved and protected water quality and soil health. Published as part of the USDA’s Conservation Effects Assessment Project (CEAP), the report, which uses data collected between 2003 and 2006 and in 2011, showed a five, six and eight percent drop in phosphorous, nitrogen and sediment runoff into the Bay. While Chesapeake Bay Program partners work closely with the USDA, this particular report is not part of the Bay Program's TMDL-related tracking efforts.
“The good work of Chesapeake Bay landowners has generated substantial progress in a short period of time, but more needs to be done,” said Agriculture Secretary Tom Vilsack in a media release. “It is critical that Congress act now to pass a Farm Bill that provides the full array of programs and incentives to build on these efforts.”
Learn more about the reporting of conservation practices in the watershed or read about the impacts of conservation practices on cropland in the region.
More than 100,000 tons of fossilized oyster shell will be shipped from the Gulf Coast to Baltimore on CSX Corporation trains, thanks to a new partnership between the Maryland Department of Natural Resources (DNR) and the Jacksonville, Fla., transportation company.
Image courtesy James Butler/Flickr
The shell will be used to restore reefs in Harris Creek and the Little Choptank River, both of which flow into the Choptank on Maryland’s Eastern Shore. The waterways are the first two sites of a National Oceanic and Atmospheric Administration (NOAA) and U.S. Army Corps of Engineers-led strategy meant to restore oysters to 20 Chesapeake Bay tributaries by 2025.
The 377-acre Harris Creek site was chosen because its water quality, salinity and protected status point to a high likelihood of restoration success. While granite will be used to build some of Harris Creek’s reefs, shell is the best material for oyster larvae to settle on, and a lack of natural shell in the region posed a restoration roadblock. The state met the challenge by spending $6.3 million on shell from Gulf Coast Aggregates.
The National Fish and Wildlife Foundation (NFWF) helped negotiate the state’s agreement with CSX, which will transport 50 train cars filled with Gulf Coast shell at cost to Curtis Bay two to three times each month over the next nine months. The shell will then be transported by barge to the Eastern Shore sanctuaries.
“This collaboration is monumental, as it allows us to complete the substrate construction of the largest tributary-focused oyster reef restoration project on the East Coast,” said Stephan Abel, executive director of the Oyster Recovery Partnership (ORP), in a media release. ORP will help build the oyster reefs, seed them with baby oysters and monitor planting success. “In all, more shell will be placed in Maryland waters over the next nine months than in the past decade—enough to cover 80 football fields with shell 12 inches deep.”
Habitat loss, disease and historic over-harvesting have contributed to a dramatic decline in native oyster populations. But the bivalves play a critical role in the Bay’s environment and the region’s economy, filtering water and feeding countless area residents.