Document Detail

Chronic and episodic acidification of Adirondack streams from acid rain in 2003-2005.
MedLine Citation:
PMID:  18948480     Owner:  NLM     Status:  MEDLINE    
Limited information is available on streams in the Adirondack region of New York, although streams are more prone to acidification than the more studied Adirondack lakes. A stream assessment was therefore undertaken in the Oswegatchie and Black River drainages; an area of 4585 km(2) in the western part of the Adirondack region. Acidification was evaluated with the newly developed base-cation surplus (BCS) and the conventional acid-neutralizing capacity by Gran titration (ANC(G)). During the survey when stream water was most acidic (March 2004), 105 of 188 streams (56%) were acidified based on the criterion of BCS < 0 microeq L(-1), whereas 29% were acidified based on an ANC(G) value < 0 microeq L(-1). During the survey when stream water was least acidic (August 2003), 15 of 129 streams (12%) were acidified based on the criterion of BCS < 0 microeq L(-1), whereas 5% were acidified based on ANC(G) value < 0 microeq L(-1). The contribution of acidic deposition to stream acidification was greater than that of strongly acidic organic acids in each of the surveys by factors ranging from approximately 2 to 5, but was greatest during spring snowmelt and least during elevated base flow in August. During snowmelt, the percentage attributable to acidic deposition was 81%, whereas during the October 2003 survey, when dissolved organic carbon (DOC) concentrations were highest, this percentage was 66%. The total length of stream reaches estimated to be prone to acidification was 718 km out of a total of 1237 km of stream reaches that were assessed.
Gregory B Lawrence; Karen M Roy; Barry P Baldigo; Howard A Simonin; Susan B Capone; James W Sutherland; Sandra A Nierzwicki-Bauer; Charles W Boylen
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2008-10-23
Journal Detail:
Title:  Journal of environmental quality     Volume:  37     ISSN:  0047-2425     ISO Abbreviation:  J. Environ. Qual.     Publication Date:    2008 Nov-Dec
Date Detail:
Created Date:  2008-10-24     Completed Date:  2009-01-22     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330666     Medline TA:  J Environ Qual     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2264-74     Citation Subset:  IM    
U.S. Geological Survey, 425 Jordan Road, Troy, NY 12180, USA.
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MeSH Terms
Acid Rain / analysis*
Conservation of Natural Resources
Environmental Monitoring
Hydrogen-Ion Concentration
New York
Rivers / chemistry*
Time Factors
Water Movements
Reg. No./Substance:
0/Acid Rain

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