Download or read book Patterns of Dissolved Organic Carbon and Particulate Organic Carbon in the Guadalupe River and Canyon Lake reservoir written by Robert D. Hall and published by . This book was released on 1983 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reservoir Limnology written by Kent W. Thornton and published by John Wiley & Sons. This book was released on 1991-01-16 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addresses reservoirs as unique ecological systems and presents research indicating that reservoirs fall into two or three highly concatenated, interactive ecological systems ranging from riverine to lacustrine or hybrid systems. Includes some controversial concepts about the limnology of reservoirs, which make for interesting reading.
Download or read book Dissolved and Particulate Organic Carbon in Some Colorado Waters written by Edward B. Reed and published by . This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Instantaneous amounts of organic carbon, both particulate and dissolved, in a number of freshwaters ranging from unproductive tarns to moderately productive reservoirs were measured by acid-persulfate digestion and infrared absorption. Organic carbon was designated as net seston carbon, filter seston carbon, or dissolved carbon based on filtering techniques. Repeated sampling showed amounts of organic carbon, either dissolved or particulate, fluctuated considerably over short periods of time; the dissolved fraction probably varying less than particulate forms. Almost daily measurements in samples incubated over three week periods also revealed erratic changes, with no clear reduction in total organic carbon. The data have descriptive value, although they cannot, at this time, be related satisfactorily to the general limnological knowledge.
Download or read book Water Pollution Control Research Series 16010 EQA 10 71 Dissolved and Particulate Organic Carbon in Some Colorado Waters written by United States. Enviornmental Protection Agency and published by . This book was released on 1971 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Term Patterns of Dissolved Organic Carbon in Boreal Lakes written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I analyzed the 21 year dynamics of dissolved organic carbon (DOC) in 55 lakes in five sites across Eastern Canada in relation to regional and global variables. Regional variables included total solar radiation (TSR), precipitation (PPTN), air temperature (T) and sulfate deposition (SO4). Global variables included the Southern Oscillation Index (SOI), North Atlantic Oscillation (NAO) and Pacific Decadal Oscillation (PDO). A synchronous pattern in DOC was found among lakes within each region; however, a synchronous pattern in DOC was not found between sites, except for Kejimkujik and Yarmouth which were only 80 km apart from each other. This suggested that the variation of the long-term DOC pattern was in response to the temporal pattern of regional variables, and it supports the recent understanding that regional factors have a strong influence on many lake properties. Significant long-term trends in DOC were not evident except at the Experimental Lakes Area (ELA), where an increase in DOC was observed together with a decrease in summer TSR and an increase in summer precipitation. Annual mean air temperature has increased at the Nova Scotia and Turkey lakes sites over the study period. The relationship between the long-term pattern in DOC with the regional and global variables was analyzed for each study site to determine the key variables that could best explain the variation in the long-term pattern in DOC. TSR and PPTN were important independent variables across all sites, except for the Turkey Lakes Watershed site (TLW). Summer TSR (annual TSR for Kejimkujik and Yarmouth) had a negative relationship, while summer precipitation had a positive relationship with the long-term DOC pattern for all sites except TLW. TSR and PPTN explained 78%, 49% and 84% of the variation in the long-term DOC pattern at Dorset, ELA, and Nova Scotia (NS) sites, respectively. In contrast, the long-term pattern in DOC at TLW only had a weak relationship with the regional and global variab.
Download or read book Dissolved and Particulate Organic Carbon in Some Colorado Waters written by Edward B. Reed and published by . This book was released on 1971 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissolved and Particulate Organic Carbon in Some Colorado Waters with References written by and published by . This book was released on 1971 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sources Fates and Export of Organic Carbon in the Colorado River Basin written by Amber J. Ulseth and published by . This book was released on 2012 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers transform, mineralize, and export organic carbon and are a substantial portion of regional and global organic carbon (OC) budgets. Quantifying the drivers of OC transformation and mineralization are needed to understand how rivers export OC to downstream ecosystems. A substantial flux of OC in rivers is dissolved organic carbon (DOC). DOC sources and fates in large rivers, which drive riverine fluxes, are poorly understood. Furthermore, reservoirs decrease OC export by trapping particulate organic carbon (POC), but the effect of reservoirs on DOC export is less clear. Tailwater ecosystems directly below dams are fundamentally different than reaches upstream of reservoirs, but how these ecosystems alter OC export is less understood. I conducted three studies with the overall objective to quantify source specific fluxes of organic carbon in the Colorado River Basin. I quantified autochthonous DOC in a tailwater ecosystem as a focus of my first chapter. Few studies have focused on source specific fluxes of DOC, especially autochthonous DOC. I found that although the flux of autochthonous DOC was 7% of the total DOC flux, it was a 43% of gross primary production. Therefore, autochthonous DOC can contribute to daily DOC budgets and a large fraction of primary production in tailwater ecosystems. In chapter 2, I quantified sources and fates of DOC in the Grand Canyon reach of the Colorado River. Because sources and fates of DOC are empirically difficult to measure in large rivers, I developed a model to estimate source specific fluxes of DOC, including influx and uptake rates of DOC. Using a transport model along with a Bayesian approach, I was able to quantify fluxes of algal and terrestrial-derived DOC. The influx of algal-derived DOC was 2X greater than the influx of terrestrial-derived DOC. Terrestrial-derived DOC was piped and exported downstream. Algal-derived DOC uptake rates were similar to DOC uptake rates empirically measured in streams 1000-fold smaller than the Colorado River, Grand Canyon. The modeling approach I developed can be used to quantify sources and fates of DOC in rivers where otherwise empirical measurements are not possible. In chapter 3, I estimated OC fluxes along with DOC composition and quality to quantify how OC export changed from free-flowing rivers to reservoirs to tailwater ecosystems. I found that reservoir-tailwater ecosystems alter the sources of OC from more terrestrial to more algal-like. The OC transformation from terrestrial to more algal-like may lead to underestimation of the quantity of terrestrial OC that was buried in reservoirs because total fluxes of OC did not represent transformation processes of OC in river-reservoir-tailwater ecosystems.
Download or read book Transport of Dissolved and Particulate Organic Carbon in Rocky Mountain Ephemeral Streams written by Richard T. Litke and published by . This book was released on 1983 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissolved Organic Carbon and Disinfection By product Precursors in Waters of the Chickahominy River Basin Virginia and Implications for Public Supply written by Gary K. Speiran and published by . This book was released on 2000 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Diurnal Cycle of Dissolved and Particulate Organic Carbon in the Patuxent River Maryland written by John McKinley Hill and published by . This book was released on 1973 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Distribution of Dissolved Organic Carbon in the Peru Current System of the Pacific Ocean written by Richard T. Barber and published by . This book was released on 1967 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissolved Organic Carbon in Lakes written by Jeffrey Neil Houser and published by . This book was released on 2001 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drifting Fine Particulate Organic Matter Below Glen Canyon Dam in the Colorado River Arizona written by Emma P. Benanati and published by . This book was released on 2001 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global Assessment of Radiocarbon Isotopic Analysis for Particulate and Dissolved Organic Carbon in Riverine Systems written by Ashley Tucker and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers are a significant source of particulate and dissolved organic carbon (POC, DOC) into inland waters and coastal systems and provide a fundamental linkage between the terrestrial, oceanic, and atmospheric carbon reservoirs. Recent studies have examined the relationship between the quantity and form (POC vs. DOC) of carbon delivered to the aquatic system; however, little is known about the age of POC and DOC exported and how the radiocarbon age may vary with latitude, topographic gradient, vegetation, and land use. I provide the first global synthesis of published radiocarbon values of POC and DOC ([upper case delta]14C). Inclusion of DOC and POC parameters ([mu]M, [lower case delta]13C, [upper case delta]14C) reveal significant driving forces of DOC ([mu]M), latitude, and elevation (m) as capable of explaining 25% of the variability in DO14C in rivers and POC ([mu]M) and latitude accounting for 15% of the variability in PO14C. When [lower case delta]13C of DOC and POC and latitude were incorporated with [upper case delta]14C of DOC observations, 61% of the variability in DOC age was explained revealing the necessity to include dissolved and particulate fractions of organic carbon to yield the most robust predictive models. This study found a global trend of increasing age of DOC and increasing [lower case delta]13C of DOC and POC with increasing latitude. My study suggests future research should incorporate both particulate and dissolved OC parameters along with elevation, vegetation, land cover, and climate zones to increase understanding of what drives the age of carbon exported in riverine systems.
Download or read book Concentrations Loads and Yields of Dissolved and Particulate Organic Carbon in Streams and Groundwater of Agricultural Watersheds written by Scott Craig Kronholm and published by . This book was released on 2011 with total page 154 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 1973 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
