Domesticated dogs—particularly retriever breeds—have a long history in the Chesapeake Bay region. The Chesapeake Bay Retriever, often called a “Chessie,” can trace its history in the area back to 1807, when two Newfoundland puppies named Sailor and Canton were rescued from a sinking ship off the coast of Maryland. Each dog was given to a separate owner, where they were bred with area dogs for their sturdy build, endurance and agility.
Bred to be working dogs, Chessies are particularly helpful to waterfowl hunters, as they will happily brave ice-cold waters to retrieve ducks, geese and other birds. As part of the Atlantic Flyway, the Chesapeake Bay region sees millions of migratory birds pass through during their seasonal flights, making the region a haven for hunters. Events like the Waterfowl Festival and Dock Dogs competitions celebrate the skills and intelligence of the four-legged friends who travel alongside them.
Image by Will Parson
The word “pollution” tends to bring to mind images of dark smoke billowing out of smokestacks or fluorescent-colored water spilling out of pipes. But there are other types of pollutants in the Chesapeake Bay region and they come from a somewhat unexpected place: agriculture.
Agriculture is the single largest source of nutrient and sediment pollution in the Chesapeake Bay region. Nutrients, such as nitrogen and phosphorus, feed algal blooms that create harmful conditions for the Bay’s fish. Too much sediment can cloud the water and smother bottom-dwelling animals. These pollutants are difficult to control because, instead of spilling out of pipes, they run off of large fields when it rains. Sam Owings, a farmer in Chestertown, Maryland, knew the challenges of controlling agricultural runoff, so he decided to develop his own solution.
Owings knows farming, and he knows stormwater. He grew up on a farm where he worked until he was 30 years old, after which he started a site development contracting business. “I learned a lot about soil erosion and soil conservation in agriculture,” he said, “and then I learned about stormwater control in site development.”
After returning to farming 15 years ago, he combined that knowledge to develop what he calls the “cascading system.” The system, which he built and tested on his farm, is a strip of four 40 by 140 foot trenches in a grass waterway between two of his fields. The grass waterway is an area where rainwater—and farm runoff—naturally collect from over 100 acres of surrounding land and are funneled toward a nearby creek.
“The idea behind it is to reduce stormwater flows from the land into state waters,” Owing said. It’s designed to slow down the flow of water by having it run through the strip of basins, filling up each one before allowing any water to discharge into the creek. After the rain stops, the remaining water sits in the basins to either evaporate or absorb back into the ground. Owings specifically placed the basins in an area that receives concentrated runoff from a large area of over 100 acres.
After receiving a research grant from Maryland Industrial Partnerships, Owings teamed up with University of Maryland professor Dr. Allen Davis to conduct a two year study of the system. The results Davis got were telling: of the water that entered the cascading system, 56 percent was not released out the other end and into the creek. The system also captured 65 percent of sediment and over half the nutrients.
Even with the apparent success of the cascading system, Owings isn’t done. He developed a “chain system,” or what he described as a “filter strip on steroids.” Unlike the cascading system, which was designed for concentrated, high-flow areas, the point of the chain system is to collect regular runoff from fields. “The concept is simple,” he said about both of his systems. “You can take an existing filter strip and retrofit it into these.”
The suitability to existing farms is one of the advantages Owings sees in both of his systems. “With many environmental programs, [farmers] have to give up tillable land,” he explained. But since the cascading and chain systems are in grass waterways, which are generally not utilized by farmers, “you’re just making the land more efficient.”
All in all, the project seems to be working for Owings. Now, he’s working with Earth Data to try and get his cascading system certified as a best management practice, a designation that means it is an efficient and effective practice to combat agricultural runoff.
When asked why he developed these systems, Owings’ answer was straightforward: “Farmers are inherently problem-solvers. Agriculture pollution is a problem, and so why not work on a solution?”
Text by Joan Smedinghoff
Video and photo by Will Parson
Polaris, also known as the North Star, appears stationary above the horizon of Blackwater National Wildlife Refuge. Harriet Tubman, who grew up near the refuge in Dorchester County, Maryland, used Polaris as her guiding light as she and other escaped slaves fled north on the Underground Railroad, a path forged by freedom-seeking slaves and abolitionists in the 19th century.
On their journeys, Tubman and others fleeing to Canada could rely on several natural signs to point them northward: moss grows on the north side of trees, migrating birds fly north in the summer and Polaris always points north. Over the course of a decade, Tubman risked her life on more than a dozen trips back to Maryland to transport her parents, brothers, family members and friends to freedom.
As the birthplace of Tubman, the Eastern Shore of Maryland holds a rich history in its expansive farm fields, settlements and wetlands that nestle into the crooks and creeks of the Chesapeake Bay. Along the 125-mile Harriet Tubman Underground Railroad Byway, which winds through Caroline and Dorchester Counties, visitors can stop at more than 30 sites that tell the story of Tubman’s pathway to freedom, where she lived, worked and fought to free herself and countless others.
Image by Will Parson
The amount of nutrient and sediment pollution entering the Chesapeake Bay fell significantly between 2014 and 2015, helping improve water quality in the nation’s largest estuary. Experts attribute this drop in pollution loads to dry weather and below-normal river flow, but note local efforts to reduce pollution also played a role. Indeed, related research shows “best management practices”—including upgrading wastewater treatment plants, lowering vehicle and power plant emissions, and reducing runoff from farmland—have lowered nutrients and sediment in local waterways.
Excess nutrients and sediment are among the leading causes of the Bay’s poor health. Nitrogen and phosphorus can fuel the growth of algae blooms that lead to low-oxygen “dead zones,” while sediment can suffocate shellfish and block sunlight from reaching underwater grasses. By tracking pollution loads into rivers and streams, the Chesapeake Bay Program (CBP) can ensure our partners are on track to meet clean water goals.
According to data from the CBP and the U.S. Geological Survey (USGS), nitrogen, phosphorus and sediment loads to the Bay were below the long-term average in 2015. Between 2014 and 2015, nitrogen loads fell 25 percent, phosphorus loads fell 44 percent and sediment loads fell 59 percent. Below-average loads are considered positive because reductions in nitrogen, phosphorus and sediment pollution can improve water quality.
The most recent assessment of water quality—which examines dissolved oxygen, water clarity and chlorophyll a (a measure of algae growth) in the Bay and its tidal waters—makes these improvements clear: between 2013 and 2015, an estimated 37 percent of the tidal Chesapeake met water quality standards. While this is far below the 100 percent attainment needed for clean water and a stable aquatic habitat, it marks an almost 10 percent improvement from the previous assessment period.
A large portion of pollution loads enters the Bay from the rivers within its watershed. Accordingly, the USGS tracks both annual pollution loads and trends in these loads at monitoring stations along nine of the biggest rivers that feed the Bay. In some cases, long-term pollution trends at these stations reflect efforts to improve water quality. Long-term trends in nitrogen, for example, are improving at six of the nine monitoring stations. Long-term trends in phosphorus and sediment, however, are more variable, and short-term pollution trends show less improvement.
“While the lowered amount of pollution entering the Chesapeake Bay in 2015 is encouraging, the trends of nutrients and sediment over the last decade in the major rivers flowing into the Bay show mixed results,” said U.S. Geological Survey Chesapeake Bay Coordinator Scott Phillips in a media release. “There will need to be improving trends in all of these rivers to support improvement in the Bay’s health.”
Last year’s decline in pollution loads can, in large part, be attributed to favorable weather. While high precipitation can increase river flow and push pollution into the Bay, river flow was below normal in 2015. The long-term decline in pollution loads can also be attributed to on-the-ground pollution-reducing practices, which jurisdictions put in place to meet first the 1983 Chesapeake Bay Agreement, then similar agreements signed in 1987 and 2000, and later the requirements of the Chesapeake Bay Total Maximum Daily Load (Bay TMDL). As of 2015, computer simulations show these practices are in place to achieve 31 percent of the nitrogen reductions, 81 percent of the phosphorus reductions and 48 percent of the sediment reductions necessary to reach our clean water goals.
While improvements in water quality will take time—due in large part to the lag between the implementation of a conservation practice and the visible effect of that practice on a particular waterway—the ecosystem is beginning to respond to protection and restoration efforts. Last year, researchers observed more than 91,000 acres of underwater grasses (also known as submerged aquatic vegetation or SAV) in the Bay, which surpassed the Chesapeake Bay Program’s 2017 restoration target two years ahead of schedule and marked the highest amount ever recorded by the Virginia Institute of Marine Science aerial survey.
“As an SAV biologist, I’m thrilled to see these improving trends in water quality, whether they’re an effect of low flow or our pollution reduction efforts, or both,” said Maryland Department of Natural Resources Biologist and Submerged Aquatic Vegetation Workgroup Chair Brooke Landry. “Better water quality means more SAV, and more SAV means more food and habitat for the fish, invertebrates and waterfowl that depend on it. In 2015, SAV expanded in areas throughout the Bay, and even appeared in places where it's never been recorded before, reaching almost 50 percent of our ultimate restoration goal. This is very exciting and provides the incentive we need to stay on track with our efforts to clean up the Bay. It’s not always easy, but it’s worth it.”
“The ecosystem of the Chesapeake Bay watershed is large and complex and can be affected by a variety of different factors,” said Chesapeake Bay Program Director Nick DiPasquale in a media release. “We are witnessing improvement in a number of our indicators—bay grasses, water clarity and water quality standards attainment, as well as a number of our fisheries such as blue crab population. But we must stay focused and ramp up our pollution reduction efforts if we are to be successful over the long term.”