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
United States Geological Survey

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:4/13/2016)... April 13, 2016  IMPOWER physicians supporting Medicaid patients ... a new clinical standard in telehealth thanks to a ... the higi platform, IMPOWER patients can routinely track key ... body mass index, and, when they opt in, share ... visit to a local retail location at no cost. ...
(Date:3/29/2016)... March 29, 2016 LegacyXChange, Inc. ... "LEGX" and SelectaDNA/CSI Protect are pleased to announce our ... in a variety of writing instruments, ensuring athletes signatures ... created collectibles from athletes on LegacyXChange will be assured ... the DNA. Bill Bollander , CEO ...
(Date:3/22/2016)... PROVO and SANDY, ... Screening Ontario (NSO), which operates the highest sample volume ... testing, and Tute Genomics and UNIConnect, leaders in clinical ... today announced the launch of a project to establish ... testing panel. NSO has been contracted ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... (PRWEB) , ... June 23, 2016 , ... STACS DNA ... Technical Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a ... STACS DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further ...
(Date:6/23/2016)... Ky. , June 23, 2016 ... two Phase 1 clinical trials of its complement ... placebo-controlled, single and multiple ascending dose studies designed ... pharmacodynamics (PD) of subcutaneous injection in healthy adult ... subcutaneously (SC) either as a single dose (ranging ...
(Date:6/23/2016)... -- Andrew D Zelenetz , ... Published recently in Oncology & ... Andrew D Zelenetz , discusses the fact ... placing an increasing burden on healthcare systems worldwide, ... the patents on many biologics expiring, interest in ...
(Date:6/23/2016)... San Francisco, CA (PRWEB) , ... June 23, ... ... capture (EDC) software, is exhibiting at the Pennsylvania Convention Center and will showcase ... DIA Annual conference. ClinCapture will also be presenting a scientific poster on Disrupting ...
Breaking Biology Technology:
Cached News: