Download or read book Water Quality of Three Forest Streams in Pennsylvania Impacted by Acidic Atmospheric Deposition written by Brendan Reed and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Acidic atmospheric deposition has impacted forests and waterways of the northeastern United States. Acidic deposition is largely attributed to compounds emitted to the atmosphere from combustion of fossil fuels for power generation. Major impacts of acid deposition on forested watersheds are part of an acidification process. Declines in pH of soils can lead to leaching of base cations from soils that decrease the ability of a watershed to buffer itself from incoming acids. Declines in pH of streamwater are often accompanied by changes in stream base cation loads and increases in dissolved inorganic aluminum concentrations, which in turn negatively affect aquatic life. Due to the Clean Air Act Amendments of 1990 and other policies, rates of acidic atmospheric deposition have greatly decreased in the northeastern United States in recent decades. Questions remain, however, about whether acid-sensitive forested watersheds will be able to recover from decades of acid deposition, and the length of time that it will take for this recovery to occur. This project quantified improvement in water quality in forested Pennsylvania streams in response to decreases in acidic atmospheric deposition since the early 1990s. In addition to analyzing long-term records of a single sampling site on each stream, I conducted synoptic sampling of stream segments throughout three forested headwater watersheds under summer baseflow conditions in order to characterize how water quality in the main channels changed from headwaters to outlet. All three watersheds have been subject to heavy loadings of acid deposition in recent decades, two of the watersheds (Roberts Run and Stone Run) were poorly buffered and thus acid-sensitive, while one of the watersheds (Young Womans Creek) was well buffered and thus acid-tolerant. Results show that some chemical recovery (i.e., increased pH, decreased aluminum concentrations) has occurred in the acid-sensitive streams. However, the sensitive watersheds are still considered to be chronically acidified along much of their stream length in terms of water quality parameters. The measured acid neutralizing capacity has not shown significant increases over the period of record. The acid-sensitive streams are thus still at high risk of episodic acidification, and biological recovery has likely not yet fully occurred.
Download or read book The Effects of Acidic Deposition on Aquatic Ecosystems in Pennsylvania written by William E. Sharpe and published by . This book was released on 1999 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Acidic Precipitation on the Water Quality of Streams in the Laurel Hill Area Somerset County Pennsylvania 1983 86 written by James L. Barker and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Acidic Precipitation on the Water Quality of Streams in the Laurel Hill Area Somerset County Pennsylvania 1983 86 written by James L. Barker and published by . This book was released on 1990 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water resources Investigations Report written by and published by . This book was released on 1990 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 1998 Pennsylvania Acidic Deposition Conference written by William E. Sharpe and published by . This book was released on 1999 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Quality and Forestry written by Bonnie Emmert and published by . This book was released on 1993 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Probable Effects of Acid Precipitation on Pennsylvania Waters written by Dean E. Arnold and published by . This book was released on 1980 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring Ecological Condition at Regional Scales written by Shabeg S. Sandhu and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Environmental Monitoring and Assessment Program was created by EPA to develop the capability for tracking the changing conditions of our natural resources and to give environmental policy the advantages ofa sound scientific understanding of trends. Former EPA Administrators recognized early that contemporary monitoring programs could not even quantify simple unknowns like the number of lakes suffering from acid rain, let along determine if national control policies were benefiting these lakes. Today, adding to acidification impacts are truly complex problems such as determining the effects of climate change, of increases in ultraviolet light, toxic chemicals, eutrophication and critical habitat loss. Also today, the Government Performance and Results Act seeks to have agencies develop performance standards based on results rather than simply on levels of programmatic activities. The charge to EMAP of ecosystems is, therefore, the same today as it was a with respect to measuring the condition decade ago. We welcome the increasing urgency for sound scientific monitoring methods and data by efforts to protect and improve the environment. Systematic nationwide monitoring of natural resources is more than anyone program can accomplish, however. In an era of declining budgets, it is crucial that monitoring programs at all levels of government coordinate and share environmental data. EMAP resources are dwarfed by the more than $500 million spent on federal monitoring activities each year.
Download or read book Acid Precipitation written by and published by . This book was released on 1984 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Operating Research Plan written by United States. Interagency Task Force on Acid Precipitation and published by . This book was released on 1984 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Acidity of Several Pennsylvania Streams During Low Water written by R. D. Leitch and published by . This book was released on 1931 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Health Perspectives written by and published by . This book was released on 1990 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Acidic Precipitation on the Water Quality of Streams in the Laurel Hill Area Somerset County Pennsylvania 1983 86 written by James L. Barker and published by . This book was released on 1990 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fact Sheet written by and published by . This book was released on 1998 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Allegheny National Forest N F Understory Vegetation Management Warren County written by and published by . This book was released on 1991 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
