HOME >> BIOLOGY >> NEWS
Slow-moving ground water slows down water-quality improvements in Chesapeake Bay

Ground water supplies about half of the water and nitrogen to streams in the Chesapeake Bay watershed and is therefore an important pathway for nitrogen to reach the bay, according to a recent U.S. Geological Survey (USGS) study. Too many nutrients, most of all nitrogen, are the principal cause for poor water-quality conditions in the Chesapeake Bay.

The ground water moving to streams in the Bay watershed has an average age of 10 years. The relatively slow movement of ground water to streams and into the Bay will impact the "lag time" between implementation of management practices and improvement of water quality in the Bay. The Chesapeake Bay Program, a multi-agency watershed partnership, is implementing nutrient-reduction strategies in an attempt to improve water-quality conditions in the Bay by 2010.

"Over the past dozen years we have seen more than 3 million acres in the Bay watershed put under nutrient management plans," said Chesapeake Bay Program Director Rebecca Hanmer. "This improved scientific understanding provided by the USGS will help us better estimate when we'll see the benefits from these efforts and how much more is needed to bring back the Bay."

The age of ground water in shallow aquifers underlying most of the Chesapeake Bay watershed ranges from less than 1 year to more than 50 years. The majority of the ground water (75 percent) is less than 13 years old, which is younger than previously thought.

The USGS study found that just over 50 percent of the water in a stream is from ground water with a range of 16 to 92 percent. Surface-water runoff and soil water supply the rest of the water to a stream; both have very young ages (hours to months).

Nitrogen in streams that drain to the Bay comes from both runoff and ground water. Nitrogen enters ground water from rainfall or through application of fertilizers and other practices associated with agricultural, suburban and urban areas. The USGS study estimated that on aver
'"/>

Contact: Kathleen Gohn
kgohn@usgs.gov
703-648-4242
United States Geological Survey
18-Feb-2004


Page: 1 2

Related biology news :

1. Breaking new ground in germ cell guidance
2. Underground carbon dioxide storage reduces emissions
3. Mysterious beach closures may be linked to contaminated groundwater, study finds
4. Tufts University groundbreaking research on caterpillar locomotion
5. Kinase backgrounder: Iressa discovery part of major kinase project at Dana-Farber
6. NCAR aircraft, ground instruments to track carbon dioxide uptake
7. Too good eyes for living below ground
8. Using soils as filters to prevent crypto from moving to the groundwater
9. Researchers discover new family of Atlantic corals in groundbreaking study
10. Mustard-root map breaks new ground tracking gene expression
11. $51 million research facility, classroom complex breaks ground at UH

Post Your Comments:
(Date:7/30/2014)... York University is paving the way for a ... and military troops exposed to poisonous chemicalsparticularly those ... article in the current issue of the journal ... organophosphates, which are compounds commonly used in pesticides ... by NYU School of Engineering Associate Professor of ...
(Date:7/30/2014)... The black truffle uses reversible epigenetic processes to regulate ... The ,methylome, - a picture of the genome regulation ... open access journal Genome Biology and illustrates ... elements and ,jumping genes,. The authors say this may ... are controlled. , Black truffles (Tuber melanosporum), also known ...
(Date:7/30/2014)... Lewis Carroll,s Through the Looking Glass, collaborators from ... Singapore improved a 35-year-old ecology model to better ... of years. , The new model, called a ... Queen Effect," an evolutionary hypothesis introduced by Lee ... organisms must constantly increase their fitness (or ability ...
Breaking Biology News(10 mins):Engineering a protein to prevent brain damage from toxic agents 2How black truffles deal with the jumpers in their genome 2Classic Lewis Carroll character inspires new ecological model 2Classic Lewis Carroll character inspires new ecological model 3
(Date:7/31/2014)... (PRWEB) July 31, 2014 ... and collaboration company, is proud to announce the ... LMS complements Adobe Connect’s elearning tools to quickly ... delivers content with training tools for desktop and ... with LMS is the perfect online training solution, ...
(Date:7/31/2014)... July 31, 2014 The Kidney Cancer Association ... its monthly news magazine, Kidney Cancer News. , Bill ... on a website maintained by an international news organization. When ... increase in viewers.” , This month’s program highlights news of ... analyzed in a recent study. Kidney Cancer News also ...
(Date:7/31/2014)... (PRWEB) July 31, 2014 Boston’s Adult ... itself flush with innovative adult stem cell biotechnologies. ... and has three additional patent applications currently under ... The patented inventions address two of the most vexing ... medicine. Adult stem cells are difficult to identify; ...
(Date:7/31/2014)... Sales Horizons, a leader in sales ... training course – Mastering the Complex Sale ... Drawn from proven sales training programs used by thousands ... Sale online sales training course is available to every ... contact with customers, like technical support, engineers, clinical support, ...
Breaking Biology Technology:SoundConnect Enhances Portfolio with Adobe Connect Learning Management System (LMS) 2The Adult Stem Cell Technology Center, LLC Launches A Marketing Campaign To License Adult Stem Cell Biotechnologies 2The Adult Stem Cell Technology Center, LLC Launches A Marketing Campaign To License Adult Stem Cell Biotechnologies 3Sales Horizons Offers Mastering the Complex Sale - a Comprehensive, Online Sales Skills Training Course 2Sales Horizons Offers Mastering the Complex Sale - a Comprehensive, Online Sales Skills Training Course 3
Cached News: