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Abiotic Controls Of Fine Sediment On The Form And Mobility Of Phosphorus In A Gravel Bed River During Low Flow
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Book Synopsis Abiotic Controls of Fine Sediment on the Form and Mobility of Phosphorus in a Gravel-bed River During Low Flow by : Caitlin Watt
Download or read book Abiotic Controls of Fine Sediment on the Form and Mobility of Phosphorus in a Gravel-bed River During Low Flow written by Caitlin Watt and published by . This book was released on 2018 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landscape scale disturbance in forested source water regions can accelerate the transfer of fine sediment and associated phosphorus (P) to receiving streams and degrade water quality in downstream environments for human and ecosystem use. The abiotic controls of deposited riverbed and suspended fine sediment on the form and mobility of P were examined in an oligotrophic gravel-bed river undergoing cumulative downstream sediment pressures from disturbance (e.g., harvesting, wildfire and sewage effluent) in Alberta, Canada. The spatial distribution of particulate P forms (NAIP, AP, OP) and major element composition were assessed across six study sites in the Crowsnest River that receive tributary inputs from watersheds that have experienced a range of landscape disturbance types. Pore-water soluble reactive P (SRP) concentration profiles within the gravel-bed were measured with pore-water peepers. Diffusive fluxes from the sediment to the water column were related to landscape disturbances, substrate properties, dissolved oxygen concentrations, and fine sediment sorption characteristics. A series of batch experiments were conducted to determine the Equilibrium Phosphate Concentration (EPC0) and evaluate the potential of fine sediment to influence P concentrations in the overlying water column. Results of the study demonstrated varying sensitivities to landscape disturbances due to the heterogeneous nature of gravel-bed substrate and morphology. Macro- to micro-scale processes influenced the form and mobility of P, however fine sediments in the riverbed irrespective of landscape disturbance demonstrated the potential of the riverbed to release SRP to the water column. Sewage inputs had the greatest impact on SRP fluxes from the riverbed and bioavailability of P in suspended sediments. The most bioavailable form of particulate P (NAIP) was associated with metal oxide and organic carbon coatings on sediment. Lower dissolved oxygen concentrations are likely responsible for driving the release of P from redox sensitive metals. Bioavailable particulate P and the release of SRP can influence in-stream water quality and ecological communities, and over longer time scales can propagate effects downstream to reservoirs and impact drinking water supplies. This thesis provides new knowledge regarding the impacts of both landscape disturbance and site-specific abiotic processes that influence the form and mobility of P in a gravel-bed river during the biologically sensitive period of summer low flow.
Book Synopsis Controls on Phosphorous Mobility in the Potomac River Near the Blue Plains Wastewater Treatment Plant by : Paul P. Hearn
Download or read book Controls on Phosphorous Mobility in the Potomac River Near the Blue Plains Wastewater Treatment Plant written by Paul P. Hearn and published by . This book was released on 1984 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Review of Phosphorus Control Measures in the United States and Their Effects on Water Quality by : David W. Litke
Download or read book Review of Phosphorus Control Measures in the United States and Their Effects on Water Quality written by David W. Litke and published by . This book was released on 1999 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response Curves for Phosphorus Plume Lengths from Reactive-solute-transport Simulations of Onland Disposal of Wastewater in Noncarbonate Sand and Gravel Aquifers by : John A. Colman
Download or read book Response Curves for Phosphorus Plume Lengths from Reactive-solute-transport Simulations of Onland Disposal of Wastewater in Noncarbonate Sand and Gravel Aquifers written by John A. Colman and published by . This book was released on 2005 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Uptake and Release by Lake Ontario Sediments by : Roger T. Bannerman
Download or read book Phosphorus Uptake and Release by Lake Ontario Sediments written by Roger T. Bannerman and published by . This book was released on 1975 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Third International Workshop on Phosphorus in Sediments by : P.C.M. Boers
Download or read book Proceedings of the Third International Workshop on Phosphorus in Sediments written by P.C.M. Boers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Workshop was organized to assess the status of knowledge on the behaviour of phosphorus in sediments and to define gaps and reassess research strategies, particularly with respect to prevalent methodology and future approach; and to define gaps and reassess research strategies for water management measures in aquatic ecosystems, especially in relation to the release of phosphorus from the sediments and its impact on the functioning of the whole system.
Book Synopsis Sediment and Phosphorus Dynamics Behind Weirs in Agricultural Drainage Ditches by :
Download or read book Sediment and Phosphorus Dynamics Behind Weirs in Agricultural Drainage Ditches written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Low grade rip rap weirs installed in agricultural surface drainage ditches manage downstream eutrophication by slowing water flow, allowing sediments time to settle out of the water column and phosphorus (P) to sorb to soil. A laboratory experiment was conducted in microcosm chambers to simulate increased hydraulic residence time caused by weirs and two field studies were conducted to compare experimental data with field data and determine sediment deposition rates. One field study monitored weirs monthly after installation and the other measured weirs of varying ages. Weirs retained significantly more water and sediment than controls. Longer inundation times led to abiotic factors known to release P during hydrologic flux, but did not translate to reduced P storage. By converting intermittently inundated sediments into more consistently saturated sediments, weirs function as a viable conservation practice for about a year until temporary P retention mechanisms and sediment retention capacities are reached.
Book Synopsis Phosphorus Release from Lake Sediments by : Raymond E. Wildung
Download or read book Phosphorus Release from Lake Sediments written by Raymond E. Wildung and published by . This book was released on 1973 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Controls on Phosphorus Mobility in the Potomac River Near the Blue Plains Wastewater Treatment Plant by : Paul P. Hearn
Download or read book Controls on Phosphorus Mobility in the Potomac River Near the Blue Plains Wastewater Treatment Plant written by Paul P. Hearn and published by . This book was released on 1985 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Water-column PH on Sediment-phosphorus Release Rates in Upper Klamath Lake, Oregon, 2001 by : Lawrence H. Fisher
Download or read book Effect of Water-column PH on Sediment-phosphorus Release Rates in Upper Klamath Lake, Oregon, 2001 written by Lawrence H. Fisher and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Chemistry of Phosphate and Nitrogen Compounds in Sediments by : Han L. Golterman
Download or read book The Chemistry of Phosphate and Nitrogen Compounds in Sediments written by Han L. Golterman and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the processes behind cycles of the phosphate and nitrogen compounds in sediment and the phosphate equilibria between the sediment and the overlying water. In most waters, excessive concentrations of these compounds causes eutrophication: rapid, choking growth of algae. The chapters of this book probe the chemicals involved in considerable detail, and offer the complete understanding needed to remediate or prevent pollution problems.
Book Synopsis Phosphorus Uptake and Release by Lake Ontario Sediments by : Roger T. Bannerman
Download or read book Phosphorus Uptake and Release by Lake Ontario Sediments written by Roger T. Bannerman and published by . This book was released on 1975 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Biogeochemistry of Sub-Tropical Ecosystems by : K. Ramesh Reddy
Download or read book Phosphorus Biogeochemistry of Sub-Tropical Ecosystems written by K. Ramesh Reddy and published by CRC Press. This book was released on 1999-04-29 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus is one of the major nutrients limiting the productivity of terrestrial, wetland and aquatic ecosystems. Over the last decade several research projects were conducted on Florida's ecosystems from state and federal agencies and private industry to address water quality issues, and to develop management practices to control nutrient loads. Phosphorus Biogeochemistry in Sub-Tropical Ecosystems is the first thorough study of the role of phosphorus in ecological health and water quality ever published. Because of its vast and extensively studied ecosystems, Florida has often served as a national laboratory on current and future trends in ecosystem management. The reader will find studies at all levels of biological organization, from the cellular to entire ecological communities. The book is a definitive study of the role and behavior of phosphorus deposition in the upland/wetland/aquatic environment. The papers presented in this book are organized in specific groups: ecological analysis and global issues, biogeochemical transformations, biogeochemical responses, transport processes, phosphorus management, and synthesis. Although Florida's ecosystems are used as a case study, the results presented have global applications.
Book Synopsis Assessing the water quality benefit of point source phosphorus control in the james river basin by : Wu-Seng Lung
Download or read book Assessing the water quality benefit of point source phosphorus control in the james river basin written by Wu-Seng Lung and published by . This book was released on 1985 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temporary Aquatic Systems by : Daniela Dieter
Download or read book Temporary Aquatic Systems written by Daniela Dieter and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2013 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water level fluctuations are a global phenomenon creating temporary aquatic systems. Recent trends in climate and land use changes have led to their spatio-temporal expansion, meaning that temporary streams and lakes show longer periods of low water level or that currently permanent systems switch to a temporary regime. Drying and re-flooding often greatly affect redox-sensitive processes, such as the decomposition of organic material and phosphorus dynamics. Both are generally regarded as key ecosystem processes making them valuable indicators for functional ecosystem health. This work describes how preconditioning of leaf litter in dry systems reduced the leaf quality considering it a substrate for aquatic decomposer communities and as a result reduced leaf decomposition rates. In the sediments, even a single drying event was shown to result in the transformation of phosphorus components into more labile forms, which are accumulated in the near-surface sediment layer, and therefore raise the potential of pulsed P release under reducing conditions.
Book Synopsis Phosphorus in Fresh Water and the Marine Environment by : Samuel Harry Jenkins
Download or read book Phosphorus in Fresh Water and the Marine Environment written by Samuel Harry Jenkins and published by Pergamon. This book was released on 1973 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Sequestration for Control of Cyanobacterial Growth in Drinking Water Reservoirs by : Jill Crumb
Download or read book Phosphorus Sequestration for Control of Cyanobacterial Growth in Drinking Water Reservoirs written by Jill Crumb and published by . This book was released on 2016 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineered drinking water reservoirs are designed to facilitate particle settling for reduction of turbidity prior to conveyance to a drinking water treatment plant (DWTP). Fine cohesive sediment particles can carry significant loads of adsorbed phosphorus (P) that can desorb into the water column and intensify the growth of cyanobacteria (CB), causing problematic and potentially toxic CB blooms. In light of these reservoir sediment dynamics, strategies for mitigating rapid CB proliferation through sequestration of P were investigated. A series of bench scale experiments were conducted to examine the impact of managing dissolved and sediment-associated P for controlling CB growth. The first phase of testing involved batch experiments with fine reservoir sediments to determine their P release characteristics and the amount of dissolved P potentially available for CB uptake. The utility of sequestering this soluble reactive P (SRP) with a common metal salt coagulant, ferric chloride (FeCl3), was also investigated. These adsorption / desorption experiments showed that a dose as low as 25 mg/L was effective in precluding SRP desorption from the sediment over a relatively wide range of solution SRP concentrations. These results were critical to provide an understanding of the SRP-sediment dynamics after treatment with FeCl3. The second phase of testing involved confirmation of the importance of sediment-associated SRP on the growth of a commonly found CB, Microcystis aeruginosa and evaluation of the utility of FeCl3 coagulation for limiting M. aeruginosa growth through sequestration of SRP. Standard methods for culturing / growing M. aeruginosa were adapted for a series of experiments, at near bloom cell counts, in the presence and absence of sediment to demonstrate the potential utility of SRP sequestration with a common coagulant used during drinking water treatment to inhibit CB growth. While the lab-scale experiments could not, and were not expected to exactly mimic reservoir behavior, they were conducted to demonstrate proof-of-concept. They were successful in doing so because M. aeruginosa growth was inhibited with adequate FeCl3 application. Significantly lower FeCl3 doses were effective when the high levels of sediment (analogous to previously deposited sediment) were removed from the system. The results of this study have several implications for controlling the proliferation of CB through nutrient sequestration. SRP can be sequestered very effectively at doses of FeCl3 typical of DWTP operations. Growth of M. aeruginosa can even be inhibited by sequestering P when CB cell counts are elevated to levels consistent with those that may be expected at bloom conditions; as would be expected, relatively higher FeCl3 doses are then required. Further experimental work to determine the optimal dose of FeCl3 at different sediment loads and lower M. aeruginosa starting cell populations should be considered.
