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Nitrate Nitrogen Removal In Disturbed And Undisturbed Wetland Microcosms Subjected To Vertical Flow And Surface Flow Hydrology And The Affects Hydrology Storage Temperature And Incubation Temperature Exert On Denitrification Kinetics
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Book Synopsis Nitrate-nitrogen Removal in Disturbed and Undisturbed Wetland Microcosms Subjected to Vertical-flow and Surface-flow Hydrology and the Affects Hydrology, Storage Temperature, and Incubation Temperature Exert on Denitrification Kinetics by : Dennis Lloyd Busch
Download or read book Nitrate-nitrogen Removal in Disturbed and Undisturbed Wetland Microcosms Subjected to Vertical-flow and Surface-flow Hydrology and the Affects Hydrology, Storage Temperature, and Incubation Temperature Exert on Denitrification Kinetics written by Dennis Lloyd Busch and published by . This book was released on 2005 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrogen Removal and Sustainability of Vertical Flow Constructed Wetlands for Small Scale Wastewater Treatment by : Valerie J. Fuchs
Download or read book Nitrogen Removal and Sustainability of Vertical Flow Constructed Wetlands for Small Scale Wastewater Treatment written by Valerie J. Fuchs and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrate Removal from Water at the Water-mud Interface in Wetlands by : William H. Patrick
Download or read book Nitrate Removal from Water at the Water-mud Interface in Wetlands written by William H. Patrick and published by . This book was released on 1976 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Hydrologic Pulses on Nitrogen Biogeochemistry in Created Riparian Wetlands in Midwestern USA by : Maria Elizabeth Hernandez
Download or read book The Effect of Hydrologic Pulses on Nitrogen Biogeochemistry in Created Riparian Wetlands in Midwestern USA written by Maria Elizabeth Hernandez and published by . This book was released on 2006 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The effect of hydrologic conditions on nitrogen biogeochemistry was investigated in two identical 1-ha surface-flow created riverine wetlands in Columbus, Ohio, USA. These wetlands, created in 1993-1994, are fed with water from Olentangy River. For two years (2003-2004), both wetlands experienced seasonal (winter-spring) controlled hydrologic flood pulses followed by one year (2005) in which they received a steady flow rate of water. Nitrogen gas flux measurements were made in plots distributed along a transverse gradient (edge plots and high marsh plots with alternate wet and dry conditions, and low marsh plots and open water plots with permanent flooding). Highest average N2O fluxes were observed in high marsh plots followed by edge plots, open water plots, and low marsh plots. In permanently flooded plots without vegetation, nitrous oxide fluxes were low, regardless of flood pulse conditions. N2O fluxes were higher in plots with vegetation than in plots without vegetation only when plots were inundated. Denitrification in all plots was significantly correlated with soil temperature and was significantly correlated with the nitrate concentration in the inflow surface water in the growing season in permanently flooded zones. Highest mean denitrification rates were observed in the low marsh and open water zones followed by high marsh and edge zones. In permanently flooded areas, denitrification rates were significantly higher near the inflow than near the outflow. Denitrification appeared to be nitrogen limited in low marsh, high marsh and edge plots, but both carbon and nitrogen limited in open water. NO2− + NO3− mass retention was similar under pulsing and steady flow conditions. Total nitrogen (TN) retention was lower under pulsing than steady flow conditions as a result of an export of organic nitrogen occurred under pulsing conditions. Aboveground biomass productivity in the pulsing year was significantly lower than in the steady-flow flow. Belowground biomass productivities were similar in both years. Nitrogen accumulation in plants represented 54- 44% of total nitrogen removed. Denitrification accounted for 8-12 % of nitrate removed. Less than 1% of the total nitrogen removed was converted to N2O, regardless of hydrologic conditions.
Book Synopsis Nitrogen Transformations in Wetland Soils by : Ronald E. Hoeppel
Download or read book Nitrogen Transformations in Wetland Soils written by Ronald E. Hoeppel and published by . This book was released on 1974 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Proceedings of the Conference on Nitrogen as a Water Pollutant by : S. H. Jenkins
Download or read book Proceedings of the Conference on Nitrogen as a Water Pollutant written by S. H. Jenkins and published by Elsevier. This book was released on 2013-10-02 with total page 773 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Conference on Nitrogen as a Water Pollutant
Book Synopsis Nitrate Transport in Shallow Flow Systems at the Neuse River Waste Water Treatment Plant by :
Download or read book Nitrate Transport in Shallow Flow Systems at the Neuse River Waste Water Treatment Plant written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years a number of studies have indicated that riparian buffers have a high efficiency of nitrogen removal from shallow groundwater flow systems. However, little work has focused on establishing what relative effect field drainage streams may have on allowing contaminated water to bypass these riparian buffer systems. Even less attention has been focused on how storm event hydrology may affect these systems in terms of nitrate flux. Three groundwater monitoring well transects were installed in a riparian buffer and a weir flow control structure was installed on a surface drainage bordering a waste application field at the Neuse River Waste Water Treatment Plant. This application field has been in use for over 20 years. Well water and surface water were sampled for a year beginning in February 2005. Samples were analyzed for nitrate, chloride, silicate, ammonium, and phosphate concentrations as well as natural abundance nitrate-nitrogen, nitrate-oxygen, water-oxygen, and water-hydrogen stable isotope ratios. Water quality measurements were made through the transition from dormant to growing season and from high to low water table gradients and elevations. The summer and fall of 2005 were a time of extreme drought in the region and allowed examination of low flow conditions and system recovery to normal flow patterns. The buffer groundwater ion concentrations and nitrogen isotope compositions remained extremely consistent throughout the different conditions. Nitrate concentration 10 m inside the buffer averaged 33.7 mgN/L and 20 m farther into the buffer at wells 6 m from the river edge averaged 0.30 mgN/L, for a nitrate reduction of 99.1% after factoring in rainwater dilution (approximately 34.8%) calculated from chloride data. This study indicates that even shallow groundwater systems at 3-5m of depth can experience high efficient nitrogen removal by denitrification in riparian buffer zones. The surface drainage system transitioned from low flow rates and n.
Book Synopsis Nitrate Removal Capacity of Constructed Wetlands by : Richard Gregory Phipps
Download or read book Nitrate Removal Capacity of Constructed Wetlands written by Richard Gregory Phipps and published by . This book was released on 1997 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Constructed wetlands at the Des Plaines Wetland Demonstration Project in Wadsworth, Illinois were examined for their capacity to remove nonpoint source loads of nitrate from an agricultural watershed. Three flow through wetlands received different loading rates of pumped river water with seasonably variable loads of nitrate and organic nitrogen. The nitrogen removal capacities of the wetlands were estimated using mass balance and sediment-water microcosms for the 1991 and 1992 field seasons. Concentrations of nitrogen and flow volumes were monitored at inlets and outlets and mass balances of nitrogen loads were calculated. The wetlands received two different loading rates in 1991, and three loading rates in 1992. Concentrations of nitrate were highest during high flow periods, and most of the annual nitrate load was associated with the spring time flows. All three wetlands were found to be net sinks for nitrate and two of the three wetlands were net exporters of organic nitrogen.
Book Synopsis Nitrogen Control by : Risk Reduction Engineering Laboratory (U.S.)
Download or read book Nitrogen Control written by Risk Reduction Engineering Laboratory (U.S.) and published by CRC Press. This book was released on 1994-12 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual is constructed to progress from a broad discussion of nitrogen in the environment to the concepts using biological processes to control or remove nitrogen, and finally to the details of designing specific systems.
Book Synopsis Denitrification in Accidental Urban Wetlands by : Amanda Klara Suchy
Download or read book Denitrification in Accidental Urban Wetlands written by Amanda Klara Suchy and published by . This book was released on 2016 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cities can be sources of nitrate to downstream ecosystems resulting in eutrophication, harmful algal blooms, and hypoxia that can have negative impacts on economies and human health. One potential solution to this problem is to increase nitrate removal in cities by providing locations where denitrification, a microbial process in which nitrate is reduced to N2 gas permanently removing nitrate from systems can occur. Accidental urban wetlands, wetlands that results from human activities, but are not designed or managed for any specific outcome are one such feature in the urban landscape that could help mitigate nitrate pollution through denitrification. The overarching question of this dissertation is: how do hydrology, soil conditions, and plant patches affect patterns of denitrification in accidental urban wetlands? To answer this question, I took a three-pronged approach using a combination of field and greenhouse studies. First, I examined drivers of broad patterns of denitrification in accidental urban wetlands. Second, I used a field study to test if plant traits influence denitrification indirectly by modifying soil resources. Finally, I examined how species richness and interactions between species influence nitrate retention and patterns of denitrification using both a field study and greenhouse experiment. Hydroperiod of accidental urban wetlands mediated patterns of denitrification in response to monsoon floods and plant patches. Specifically, ephemeral wetlands had patterns of denitrification that were largely unexplained by monsoon floods or plant patches, which are common drivers of patterns of denitrification in non-urban wetlands. Several plant traits including belowground biomass, above- and belowground tissue chemistry and rooting depth influenced denitrification indirectly by changing soil organic matter or soil nitrate. However, several other plant traits also had significant direct relationships with denitrification, (i.e. not through the hypothesized indirect relationships through soil organic matter or soil nitrate). This means these plant traits were affecting another aspect of soil conditions not included in the analysis, highlighting the need to improve our understanding of how plant traits influence denitrification. Finally, increasing species richness did not increase nitrate retention or denitrification, but rather individual species had the greatest effects on nitrate retention and denitrification.
Book Synopsis Nitrate Contamination by : Istvan Bogardi
Download or read book Nitrate Contamination written by Istvan Bogardi and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nitrate content of drinking water is rising at an alarming rate in several regions of NATO countries and elsewhere in the world. The increase is due to lack of proper sewage treatment, and primarily to excess fertilizer application. Also, eutrophication in several coastal areas is triggered by high nitrate concentrations. The main purpose of this book is to integrate scientific knowledge related to exposure assessment, health consequences and control of nitrate contamination in water. The motivation is related to the magnitude, the possible adverse health effects, and the high cost of control ling nitrate contamination. Future research tasks are defined by an interaction among hydro logists, toxicologists and environmental engineers in an integrated framework for nitrate risk management. The target readership of this book is a mix of university colleagues, practitioners from both the private and public sectors and advanced graduate students working with the hydrological, health science or environmental engineering aspects of nitrate contamination. The main conclusions include: 1. For risk assessment purposes, knowledge and sufficiently accurate models are available to predict nitrate load and its fate in water under changes in land use. 2. Once agricultural exposure controls are implemented, the response times in ground water may be so long as to make controls unrealistic. 3. It is still unknown whether agricultural best management practice is a compromise between nitrate risk reduction and agricultural revenue. 4. The current drinking water guidelines of 10 mg/L NOrN need not be changed.
Book Synopsis Monitored Natural Attenuation of Inorganic Contaminants in Ground Water by :
Download or read book Monitored Natural Attenuation of Inorganic Contaminants in Ground Water written by and published by . This book was released on 2007 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: V.3 ... consists of individual chapters that describe 1) the conceptual background for radionuclides, including tritium, radon, strontium, technetium, uranium, iodine, radium, thorium, cesium, plutonium-americium and 2) data requirements to be met during site characterization.
Book Synopsis Biochar for Environmental Management by : Dr. Johannes Lehmann
Download or read book Biochar for Environmental Management written by Dr. Johannes Lehmann and published by Earthscan. This book was released on 2009 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Biochar is the carbon-rich product when biomass (such as wood, manure, or crop residues) is heated in a closed container with little or no available air. It can be used to improve agriculture and the environment in several ways, and its stability in soil and superior nutrient-retention properties make it an ideal soil amendment to increase crop yields. In addition to this, biochar sequestration, in combination with sustainable biomass production, can be carbon-negative and therefore used to actively remove carbon dioxide from the atmosphere, with major implications for mitigation of climate change. Biochar production can also be combined with bioenergy production through the use of the gases that are given off in the pyrolysis process.This book is the first to synthesize the expanding research literature on this topic. The book's interdisciplinary approach, which covers engineering, environmental sciences, agricultural sciences, economics and policy, is a vital tool at this stage of biochar technology development. This comprehensive overview of current knowledge will be of interest to advanced students, researchers and professionals in a wide range of disciplines"--Provided by publisher.
Book Synopsis The Hyporheic Handbook by : Great Britain, Environment Agency Staff
Download or read book The Hyporheic Handbook written by Great Britain, Environment Agency Staff and published by . This book was released on 2009-11 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook brings together the latest research on a range of topics related to the groundwater-surface water interface and hyporheic zones specifically for environmental management practitioners.
Book Synopsis The Ecology and Management of Wetlands by : Donal D. Hook
Download or read book The Ecology and Management of Wetlands written by Donal D. Hook and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the proceedings of a symposium held at the College of Charleston, Charleston, South Carolina, USA, 16-20 June 1986. The seed for this symposium arose from a group of physiologists , soU scientists and biochemists that met in Leningrad, USSR in July 1975 at the 12th Botanical Conference in a Session organized by Professor B.B. Vartepetian. This group and others later conspired to contribute to a book entitled Plant Life in Anaerobic Environments (eds. D. D. Hook and R. M. M. Crawford, Ann Arbor Science, 1978). Several contributors to the book suggested in 1983 that a broad-scoped symposium on wetlands would be useful (a) in facilitating communication among the diverse research groups involved in wetlands research (b) in bringing researchers and managers together and (c) in presenting a com prehensive and balanced coverage on the status of ecology ami management of wetlands from a global perspective. With this encouragement, the senior editor organized a Plan ning Committee that encompassed expertise from many disciplines of wetland scientists and managers. This Committee, with input from their colleagues around the world, organized a symposium that addressed almost every aspect of wetland ecology and management.
Book Synopsis Wetlands and Natural Resource Management by : Jos T.A. Verhoeven
Download or read book Wetlands and Natural Resource Management written by Jos T.A. Verhoeven and published by Springer Science & Business Media. This book was released on 2006-11-22 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a broad and well-integrated overview of recent major scientific results in wetland science and their applications in natural resource management issues. The contributors, internationally known experts, summarize the state of the art on an array of topics, divided into four broad areas: The Role of Wetlands for Integrated Water Resources Management: Putting Theory into Practice; Wetland Science for Environmental Management; Wetland Biogeochemistry; Wetlands and Climate Change Worldwide.
