| Main Title |
Chemical Characteristics and Temporal Trends in Eight Streams of the Catskill Mountains, New York. (Revised). |
| Author |
Murdoch, P. S. ;
Stoddard, J. L. ;
|
| CORP Author |
Corvallis Environmental Research Lab., OR. ;ManTech Environmental Technology, Inc., Corvallis, OR. ;Geological Survey, Albany, NY. Water Resources Div. |
| Publisher |
c1993 |
| Year Published |
1993 |
| Report Number |
EPA/600/J-94/299; |
| Stock Number |
PB94-190535 |
| Additional Subjects |
Acidification ;
Streams ;
Chemical properties ;
Air pollution effects ;
Catskill Mountains ;
Atmospheric deposition ;
Sulfates ;
Nitric acid ;
pH ;
Concentration(Composition) ;
Base flow ;
Carbon ;
Organic compounds ;
Nitrates ;
Neutralizing ;
Trends ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB94-190535 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
18p |
| Abstract |
Discharge-concentration relations in eight streams studied by the U.S. Geological Survey as part of the U.S. EPA Long-Term Monitoring Project (1983 - 1989) indicate acidification of some streams by sulfuric and nitric acid from atmospheric deposition, and organic acids from soils. Concentrations of major ions in precipitation were similar to those reported at other sites in the Northeast. Average concentrations of sulfate and nitrate were similar among streams; base cation concentrations differed widely and the differences paralleled variations in acid neutralizing capacity (ANC). Baseflow ANC is not a strong predictor of stream acidity at high flow; some streams with high baseflow ANC showed declines to near zero ANC at high flow and one stream with low ANC at baseflow did not approach zero ANC as flow increased. Episodic decreases in ANC and pH during peak flows were associated with increases in concentrations of nitrate and dissolved organic carbon. Differences between measured ANC and concentrations of calcium and magnesium were equivalent to concentrations of sulfate. Episodic decreases in ANC and pH during peak flows were associated with increases in nitrate concentrations and dissolved organic carbon. |
| Supplementary Notes |
Pub. in Water, Air, and Soil Pollution 67, p367-395 1993. Prepared in cooperation with ManTech Environmental Technology, Inc., Corvallis, OR. and Geological Survey, Albany, NY. Water Resources Div. |
| NTIS Title Notes |
Journal article. |
| Category Codes |
68A; 68D; 99A; 99F |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
423125184 |
| Origin |
NTIS |
| Type |
CAT |
