scholarly journals Simulating streamflow and dissolved organic matter export from a forested watershed

2012 ◽  
Vol 48 (5) ◽  
Author(s):  
Na Xu ◽  
James E. Saiers ◽  
Henry F. Wilson ◽  
Peter A. Raymond
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Forested Watershed

scholarly journals Comparison of Two PARAFAC Models of Dissolved Organic Matter Fluorescence for a Mid-Atlantic Forested Watershed in the USA

2013 ◽  
Vol 2013 ◽  
pp. 1-16 ◽  
Author(s):  
Shatrughan Singh ◽  
Shreeram Inamdar ◽  
Durelle Scott
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Specific Model ◽  
Forested Watershed ◽  
Strongly Correlated ◽  
Site Specific ◽  
The Usa ◽  
Study Sites ◽  
Model Components ◽  
A Site

The composition of dissolved organic matter (DOM) in a mid-Atlantic forested watershed was evaluated using two fluorescence models—one based on previously validated model (Cory and McKnight, 2005) and the other developed specifically for our study site. DOM samples for the models were collected from multiple watershed sources over a two-year period. The previously validated parallel factor analysis (PARAFAC) model had 13 DOM components whereas our site-specific model yielded six distinct components including two terrestrial humic-like, two microbial-derived humic-like, and two protein-like components. The humic-like components were highest in surficial watershed sources and decreased from soil water to groundwater whereas the protein-like components were highest for groundwater sources. Discriminant analyses indicated that our site-specific model was more sensitive to subtle differences in DOM and the sum of the humic- and protein-like constituents yielded more pronounced differences among watershed sources as opposed to the prevalidated model. Dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) concentrations and selected DOM metrics were also more strongly correlated with the site-specific model components. These results suggest that while the pre-validated model may capture broader trends in DOM composition and allow comparisons with other study sites, a site-specific model will be more sensitive for characterizing within-site differences in DOM.

Source- and substrate-specific export of dissolved organic matter from permafrost-dominated forested watershed in central Siberia

2007 ◽  
Vol 21 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. S. Prokushkin ◽  
G. Gleixner ◽  
W. H. McDowell ◽  
S. Ruehlow ◽  
E.-D. Schulze
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Forested Watershed ◽  
Central Siberia
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