Filters: Tags: CA (X) > Categories: Publication (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (3) ArcGIS Service Definition (1) Types Citation (3) ArcGIS REST Map Service (1) ArcGIS Service Definition (1) Downloadable (1) Map Service (1) Contacts Justin Epting Alexandra Morton Bullen, Thomas D Cantrell, Kirk J Criscenti, Louise J More... Categories Data (1) Tag Types Theme (1) Tag Schemes None (1) View Results as: JSON ATOM CSV

Adsorption–Desorption Processes in Subsurface Reactive Transport Modeling Adsorption–desorption reactions are important processes that affect the transport of contaminants in the environment. Various empirical approaches, such as the distribution coefficient and Freundlich and Langmuir isotherm equations, have been used to represent adsorption. The empirical approaches are not capable of accounting for the effects of variable chemical conditions, such as pH, on adsorption reactions. This can be done using chemical models such as surface complexation models. These models define specific surface species, chemical reactions, equilibrium constants, mass balances, and charge balances, and their molecular features can be given thermodynamic significance. Ion adsorption mechanisms and surface... Categories: Publication; Types: Citation; Tags: CA, CCM, component additivity, constant capacitance A Biogeochemical Comparison of Two Well-Buffered Catchments with Contrasting Histories of Acid Deposition Much of the biogeochemical cycling research in catchments in the past 25 years has been driven by acid deposition research funding. This research has focused on vulnerable base-poor systems; catchments on alkaline lithologies have received little attention. In regions of high acid loadings, however, even well-buffered catchments are susceptible to forest decline and episodes of low alkalinity in streamwater. As part of a collaboration between the Czech and U.S. Geological Surveys, we compared biogeochemical patterns in two well-studied, well-buffered catchments: Pluhuv Bor in the western Czech Republic, which has received high loading of atmospheric acidity, and Sleepers River Research Watershed in Vermont, U.S.A.,... Categories: Publication; Types: Citation; Tags: acidification, alkalinity, base cations, buffering, ca Vegetation and Land Cover for Ellicott Slough NWR Vegetation and land cover data for Ellicott Slough NWR. This dataset was generated through interpretation of high resolution (1m spatial resolution) aerial photography from the National Agricultural Imagery Program (NAIP) , acquired in the summer of 2009. Field sampling was conducted in March 2010 to inform the interpretation process, but no formal classifcation accuracy assessment was conducted. Categories: Data, Publication; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Citation, Downloadable, Map Service; Tags: CA, ELS, Ellicott Slough NWR, habitat, land cover, All tags... vegetation, Fewer tags