منابع مشابه
Linkages of nitrate losses in watersheds to hydrological processes
A variety of factors can affect NO3 concentrations in surface waters, including atmospheric nitrogen (N) deposition, fertilizer N inputs, wastewater N contaminants, internal N cycling processes (e.g. plant uptake, mineralization, nitrification, denitrification) and hydrological flowpaths. Elevated levels of N inputs to ecosystems due to anthropogenic influences may have profound effects, includ...
متن کاملEvaluating Regional Patterns in Nitrate Sources to Watersheds in National Parks of the Rocky Mountains using Nitrate Isotopes
L E O R A N A N U S , * , † M A R K W . W I L L I A M S , ‡ D O N A L D H . C A M P B E L L , † E M I L Y M . E L L I O T T , § A N D C A R O L K E N D A L L | U.S. Geological Survey, WRD-CWSC, Federal Center, Denver, Colorado, University of Colorado at Boulder and Institute of Arctic and Alpine Research, Boulder, Colorado, Department of Geology and Planetary Science, University of Pittsburgh, ...
متن کاملEvaluating regional patterns in nitrate sources to watersheds in National Parks of the Rocky Mountains using nitrate isotopes.
In the Rocky Mountains, there is uncertainty about the source areas and emission types that contribute to nitrate (NO3) deposition, which can adversely affect sensitive aquatic habitats of high-elevation watersheds. Regional patterns in NO3 deposition sources were evaluated using NO3 isotopes in five National Parks, including 37 lakes and 7 precipitation sites. Results indicate that lake NO3 ra...
متن کاملLong-term effects of nitrogen fertilizer use on ground water nitrate in two small watersheds.
Changes in agricultural management can minimize NO3-N leaching, but then the time needed to improve ground water quality is uncertain. A study was conducted in two first-order watersheds (30 and 34 ha) in Iowa's Loess Hills. Both were managed in continuous corn (Zea mays L.) from 1964 through 1995 with similar N fertilizer applications (average 178 kg ha(-1) yr(-1)), except one received applica...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2013
ISSN: 0096-3941
DOI: 10.1002/2013eo190010