Just in time to monitor the recent extreme rain events, the USGS released it’s national water dashboard. The tool takes advantage of web mapping technology and a nationwide network of stream/river monitoring gauges to provide updated information on waterways Whether you’re planning a canoe trip or monitoring flooding, the dashboard is a useful tool for retrieving water resource data.
October is here and for many shellfish enthusiasts that means they can begin enjoying local oysters. In addition to their taste, oysters have tremendous ability to clean water through their filter feeding. Oysters pump gallons of water daily through their gills to consume the nutrients they need to live and grow. In that process, excess nutrients are removed from the water to help improve water quality.
Disease and over harvesting have decimated oyster populations along much of the east coast but there is renewed efforts grow them through aquaculture. Indeed, in the Chesapeake Bay area, oyster growers are rewarded for the nutrient reductions from filtering done by the shellfish.
Oysters play a role at improving water quality in North Carolina, too. A recent podcast describes how oyster farming is suited for North Carolina’s coastal waters. With the popularity of oysters, the demand is there to support farming while also having the side benefits of improving water quality. With some progressive policies, it’s possible that NC oyster farmers may also get financial benefits from the ecosystem services they supply, too.
As highlighted last year, the Chowan River has an Algae problem. Excess nutrients provide the key ingredient that, when combined with summer heat help fuel harmful algal blooms.
NC Sea Grant program is now funding research into the Chowan and the potential for continued harmful algal blooms. As stated by John Fear in a press release from NC Sea Grant, the research is timely because “water quality issues in this region are re-emerging after decades of calm. This work will help us understand how the algae toxins in the water respond to nutrient inputs and are translated into airborne molecules.” Wind currents can then transport airborne toxins inland from the waterfront.
This research was also highlighted last week in the news https://www.witn.com/2020/07/02/researchers-studying-algal-blooms-in-the-chowan-river/
With summer heat intensifying, it will be interesting to follow the results of this research.
2020 has not started off well. The global Pandemic has sickened and killed many and put a hard stop on the economy. Our environmental continues, however, in modified form. We’re developing plans for our current projects at home and looking forward to when we can return to more fieldwork and outreach. Until then, here’s a recent picture of a project where we’re in the regulatory approval stage for commencing work. We’re looking forward to restoring this site and other impacted ones to help create a healthier waterways and places for State residents to enjoy.
Watershed management is essential in the protection of water resources. How about revenuesheds? That’s one of the messages in a report released from UNC’s NC Policy Collaboratory on measures needed to improve water quality Jordan Lake. The revenueshed concept emphasizes that users of the resource should fund the resource’s protection. Specific to Jordan Lake, the report recommends the following:
“Those jurisdictions with a water allocation from Jordan Lake should be charged a new water allocation fee to create additional revenue for water quality improvement projects throughout the entire watershed. This additional fee will ensure that upstream communities in the Jordan Lake watershed are joined by beneficiaries of the lake in maintaining a healthy lake.”UNC Collaboratory Final Report to the North Carolina General Assembly, December 2019
If recommendations from UNC get adopted, look for user communities to fund more of both the monitoring and clean-up efforts for the Lake.
Revenuesheds, do not, however, require polluters of the resource to clean up their act. So, while the revenueshed concept has its merits, it must be balanced with policies and measures that reduce pollution sources throughout the watershed. Therefore, actions and funding are needed both in the watershed and from the revenueshed to help improve water quality in this important water resource for hundreds of thousands in our state.
At the November 2019 Environmental Management Commission Meeting, NC DEQ presented their Annual Basinwide Water Management Plan report highlighting threats and efforts to manage our state’s water resources.
Regarding nutrients, there were a number of concerning items reported:
Nutrients aside, the news was not all bad. The report highlights that in 2018 “DWR removed 35 stream segments (AU’s) from the 303(d) list for a total of 41 metal delistings.”
Findings from the report indicate that efforts to reduce nutrient pollution in North Carolina need to continue and even be enhanced. Current efforts to readopt its nutrient management rules, while needed, should be expanded to look at nutrient pollution as a statewide problem that needs action.
As the temperatures cool, the likelihood of algae blooms and associated water quality problems diminishes. Flowing through the sparsely populated northeast North Carolina, the Chowan River needs a break from being plagued by several blooms that raised health alerts from the State this summer.
The World Health Organization (WHO) provides guidance on the probability of adverse health effects due to cyanobacteria exposure. WHO cautions that moderate probability of adverse health effects with 100,000 cyanobacterial cells/ml. The prolonged bloom in the Chowan had cell counts 15 times that amount!
Clearly nutrient related water quality problems exist in the river. The severity of this bloom has put the river on the NC DEQ’s radar and the state will need to undertake pollution control protection for this sickened ecosystem.
North Carolina is no stranger to algal blooms. Hot summers, runoff from agricultural and urban lands combine with shallow, slow moving estuaries create conditions that cause harmful algal blooms (HABs). While common in our State, its becoming more common in areas to our north. Minnesota, Lake Michigan, and the Chesapeake Bay are all experienced in dealing with HABs.
A story from New Jersey illustrates how warmer summers are helping fuel the occurrence of HABs in areas to our north. Lake Hopatcong, New Jersey’s largest freshwater Lake and a popular summertime retreat experienced a severe bloom prompting the State’s Department of Environmental Protection (DEP) to shut down the Lake for recreational use around the July 4th Holiday. Their press release read:
“DEP is recommending that local health authorities close all public swimming beaches along the lake due to the widespread nature of the bloom…avoid all contact with water from Lake Hopatcong until further notice. People also should not eat fish caught in the lake or allow pets to come in contact with lake water or drink the water.”
This is certainly what no State wants to have happen to their recreational waters. Indeed, North Carolina is in the final steps of a years long process to shore up its nutrient strategies to reduce the occurrences of HABs. These efforts are desperately needed to curb a problem which is becoming more pervasive.
In 1999, the largest coastal restoration project in NC began with funding from the State’s Clean Water Management Program to purchase nearly 2000 acres of farm land in Carteret County for the purpose of restoring wetlands that were drained to become North River Farms. After 11 phases of restoration over 20 years, the State’s largest coastal restoration project is entering a new phase where we get to monitor and maintain what’s been done.
The N.C. Coastal Federation has overseen the work to return farmland back to forested, freshwater and tidal wetlands and the project has expanded to 6000 acres. With the restoration activities wrapping up, the Federation envisions being able to provide tours to showcase this re-imagined landscape.
Benefits of the project include increased habitat to support species diversity, improved water quality, groundwater recharge, and supporting shellfish populations and increased opportunities for shellfishing. As one of the premier restoration projects in the country, a visit to the site would be worthwhile.
Skimming – A recent story on the Corps of Engineers use of algal skimmers in Florida to help combat toxic algal blooms reminded me of North Carolina’s own efforts to combat algal blooms. In Florida, the Lake Okeechobee skimming process uses “dissolved air flotation” to bring algae to the surface and remove it from the water column. The process has been used effectively in wastewater treatment where the systems are contained better able to engineer but it is a relatively new approach to combating harmful algal blooms in the natural environment.
Scrubbing – A slightly different “in-line” removal process was tried in North Carolina to use scrubbing of algae. Durham partnered with HydroMentia to test the effectiveness of algae scrubbing on Falls Lake waters. In the pilot study, HydroMentia found the method had a positive effect at removing nitrogen and phosphorus, the fuel driving algal blooms (See their report https://hydromentia.com/falls-lake-algal-turf-scrubber-pilot-final-report/). While technologies such as these may not be cheap, they may be part of the solution to the nutrient pollution challenges facing NC.