Skip to Main Content
Acidification and Prognosis for Future Recovery of Acid-Sensitive Streams in the Southern Blue Ridge ProvinceAuthor(s): Timothy Sullivan; Bernard Cosby; William Jackson; Kai Snyder; Alan Herlihy
Source: Water Air Soil Pollut 219:11-26
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
PDF: Download Publication (402.69 KB)
DescriptionThis study applied the Model of Acidification of Groundwater in Catchments (MAGIC) to estimate the sensitivity of 66 watersheds in the Southern Blue Ridge Province of the Southern Appalachian Mountains, United States, to changes in atmospheric sulfur (S) deposition. MAGIC predicted that stream acid neutralizing capacity (ANC) values were above 20 μeq/L in all modeled watersheds in 1860. Hindcast simulations suggested that the median historical acidification of the modeled streams was a loss of about 25 μeq/L of ANC between 1860 and 2005. Although the model projected substantial changes in soil and stream chemistry since pre-industrial times, simulated future changes in response to emission controls were small. Results suggested that modeled watersheds would not change to a large degree with respect to stream ANC or soil % base saturation over the next century in response to a rather large decrease in atmospheric S deposition. Nevertheless, the magnitude of the relatively small simulated future changes in stream and soil chemistry depended on the extent to which S emissions are reduced. This projection of minimal recovery in response to large future S emissions reductions is important for designing appropriate management strategies for acid-impacted water and soil resources. Exploratory analyses were conducted to put some of the major modeling uncertainties into perspective.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationSullivan, Timothy J.; Cosby, Bernard J.; Jackson, William A.; Snyder, Kai U.; Herlihy, Alan T. 2011. Acidification and Prognosis for Future Recovery of Acid-Sensitive Streams in the Southern Blue Ridge Province. Water Air Soil Pollut 219:11-26.
KeywordsSulfur, Atmospheric deposition, Base cation, Acidification, Modeling
- Target loads of atmospheric sulfur deposition for the protection and recovery of acid-sensitive streams in the Southern Blue Ridge Province
- Steady-state sulfur critical loads and exceedances for protection of aquatic ecosystems in the U.S. southern Appalachian Mountains
- Effects of climate, land management, and sulfur deposition on soil base cation supply in national forests of the southern Appalachian mountains
XML: View XML