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:
*Name:
*Comment:
*Email:


(Date:3/22/2016)... and SANDY, Utah , ... which operates the highest sample volume laboratory in ... Genomics and UNIConnect, leaders in clinical sequencing informatics and ... launch of a project to establish the informatics infrastructure ... NSO has been contracted by the Ontario ...
(Date:3/15/2016)... , March 15, 2016 Yissum ... , the technology-transfer company of the Hebrew University, announced ... of remote sensing technology of various human biological indicators. ... raising $2.0 million from private investors. ... based on the detection of electromagnetic emissions from sweat ...
(Date:3/10/2016)... 10, 2016 --> ... report "Identity and Access Management Market by Component (Provisioning, ... Governance), by Organization Size, by Deployment, by Vertical, and ... MarketsandMarkets, The market is estimated to grow from USD ... 2020, at a Compound Annual Growth Rate (CAGR) of ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... -- Despite the volatility that continues to envelop ... pre-market research on ActiveWallSt.com directs the investor community,s focus on ... RDUS ), Cerus Corp. (NASDAQ: CERS ), Arrowhead ... Therapeutics Inc. (NASDAQ: FPRX ). Register with us ... http://www.activewallst.com/ On Wednesday, shares in ...
(Date:5/25/2016)... ... 2016 , ... Thailand’s Board of Investment’s New York office, ... Located at booth number 7301, representatives from the Thai Government, research organizations, and ... biotechnology and life sciences sector. , Deputy Secretary General of the Thailand ...
(Date:5/25/2016)... ... 25, 2016 , ... WEDI, the nation’s leading authority on the use of ... Stellar has been named by the WEDI Board of Directors as WEDI’s president and ... leader with more than 35 years of experience in healthcare, association management and organizational ...
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, an integrated wealth management ... The Future of San Diego Life Science event at the Estancia La Jolla Resort ... the event with speakers Dr. Rich Heyman, former CEO of Aragon and Seragon, and ...
Breaking Biology Technology:
Cached News: