Suspended sediment, dissolved organic carbon, and dissolved nitrogen export during the dam removal process

2007 ◽  
Vol 43 (9) ◽  
Author(s):  
J. Adam Riggsbee ◽  
Jason P. Julian ◽  
Martin W. Doyle ◽  
Robert G. Wetzel
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Suspended Sediment ◽  
Dam Removal ◽  
Nitrogen Export ◽  
Dissolved Nitrogen ◽  
Removal Process

Dynamics of dissolved organic carbon and total dissolved nitrogen in Maryland's coastal bays

2015 ◽  
Vol 164 ◽  
pp. 451-462 ◽  
Author(s):  
Shuiwang Duan ◽  
Nianhong Chen ◽  
Sujay S. Kaushal ◽  
Paulinus Chigbu ◽  
Ali Ishaque ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Coastal Bays ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen

scholarly journals Dissolved organic carbon and dissolved nitrogen in soil under different fertilization treatments

2011 ◽  
Vol 52 (No. 2) ◽  
pp. 55-63 ◽  
Author(s):  
S.S. Gonet ◽  
B. Debska
Keyword(s):  
Surface Layer ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Cattle Slurry ◽  
Soil Horizons ◽  
Mineral Fertilization ◽  
Labile Organic Matter ◽  
Dissolved Nitrogen ◽  
After Effect

The objective of the study was to evaluate the effects of long-term fertilization of a sandy soil with differentiated doses of cattle slurry as well as its after-effect action on the possibilities of migration of dissolved organic carbon (DOC) and dissolved nitrogen (DNt) down to deeper layers of the soil profile. DOC and DNt were extracted with borate buffer and 0.004M CaCl<sub>2</sub> solution. Evaluation of effects of cattle slurry on the content of DOC and DNt was done in comparison with mineral fertilization. It was shown that the use of cattle slurry in the doses of 100 and 200&nbsp;m<sup>3</sup>/ha caused a significant increase of labile organic matter in the 0&ndash;25 and 25&ndash;50 cm layers of soil. As compared with mineral fertilization the application of slurry increased also the amounts of extracted DNt, but only in the surface layer. The DNt content in the deeper soil horizons did not depend on the kind of fertilization. Concentrations of DOC and DNt in the extracts depended not only on their content in soil but it was also modified substantially by the extractant used.

scholarly journals Summer rainfall dissolved organic carbon, solute, and sediment fluxes in a small Arctic coastal catchment on Herschel Island (Yukon Territory, Canada)

2018 ◽  
Vol 4 (4) ◽  
pp. 750-780 ◽  
Author(s):  
Caroline Coch ◽  
Scott F. Lamoureux ◽  
Christian Knoblauch ◽  
Isabell Eischeid ◽  
Michael Fritz ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Suspended Sediment ◽  
Summer Rainfall ◽  
Yukon Territory ◽  
The Arctic ◽  
Rainfall Frequency ◽  
The Future ◽  
Matter Flux

Coastal ecosystems in the Arctic are affected by climate change. As summer rainfall frequency and intensity are projected to increase in the future, more organic matter, nutrients and sediment could be mobilized and transported into the coastal nearshore zones. However, knowledge of current processes and future changes is limited. We investigated streamflow dynamics and the impacts of summer rainfall on lateral fluxes in a small coastal catchment on Herschel Island in the western Canadian Arctic. For the summer monitoring periods of 2014–2016, mean dissolved organic matter flux over 17 days amounted to 82.7 ± 30.7 kg km−2 and mean total dissolved solids flux to 5252 ± 1224 kg km−2. Flux of suspended sediment was 7245 kg km−2 in 2015, and 369 kg km−2 in 2016. We found that 2.0% of suspended sediment was composed of particulate organic carbon. Data and hysteresis analysis suggest a limited supply of sediments; their interannual variability is most likely caused by short-lived localized disturbances. In contrast, our results imply that dissolved organic carbon is widely available throughout the catchment and exhibits positive linear relationship with runoff. We hypothesize that increased projected rainfall in the future will result in a similar increase of dissolved organic carbon fluxes.

scholarly journals Simultaneous Determination of Dissolved Organic Carbon and Total Dissolved Nitrogen on a Coupled High-Temperature Combustion Total Organic Carbon-Nitrogen Chemiluminescence Detection (HTC TOC-NCD) System

2005 ◽  
Vol 2005 (4) ◽  
pp. 240-246 ◽  
Author(s):  
Xi Pan ◽  
Richard Sanders ◽  
Alan D. Tappin ◽  
Paul J. Worsfold ◽  
Eric P. Achterberg
Keyword(s):  
High Temperature ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Data Acquisition ◽  
Simultaneous Determination ◽  
Dissolved Nitrogen ◽  
Total Dissolved Nitrogen ◽  
Temperature Combustion ◽  
High Temperature Combustion

The marine biogeochemistries of carbon and nitrogen have come under increased scrutiny because of their close involvement in climate change and coastal eutrophication. Recent studies have shown that the high-temperature combustion (HTC) technique is suitable for routine analyses of dissolved organic matter due to its good oxidation efficiency, high sensitivity, and precision. In our laboratory, a coupled HTC TOC-NCD system with a sample changer was used for the automated and simultaneous determination of dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) in seawater samples. TOC control software was used for TOC instrument control, DOC data acquisition, and data analysis. TDN data acquisition and manipulation was undertaken under LabVIEW. The combined system allowed simultaneous determination of DOC and TDN in the same sample using a single injection and provided low detection limits and excellent linear ranges for both DOC and TDN. The risk of contamination has been remarkably reduced due to the minimal sample manipulation and automated analyses. The optimised system provided a reliable tool for the routine determination of DOC and TDN in marine waters.

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