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Author :
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (383 download)
Download or read book Organic Carbon in Water, Its Sources and Role in Nutrient Transport written by and published by . This book was released on 1991 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.3/5 (91 download)
Download or read book Sources and Transport of Nutrients, Organic Carbon, and Chlorophyll-a in the San Joaquin River Upstream of Vernalis, California, During Summer and Fall, 2000 and 2001 written by and published by . This book was released on 2004 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Stefan Schmutz
Publisher : Springer
ISBN 13 : 3319732501
Total Pages : 562 pages
Book Rating : 4.3/5 (197 download)
Download or read book Riverine Ecosystem Management written by Stefan Schmutz and published by Springer. This book was released on 2018-05-08 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book surveys the frontier of scientific river research and provides examples to guide management towards a sustainable future of riverine ecosystems. Principal structures and functions of the biogeosphere of rivers are explained; key threats are identified, and effective solutions for restoration and mitigation are provided. Rivers are among the most threatened ecosystems of the world. They increasingly suffer from pollution, water abstraction, river channelisation and damming. Fundamental knowledge of ecosystem structure and function is necessary to understand how human acitivities interfere with natural processes and which interventions are feasible to rectify this. Modern water legislation strives for sustainable water resource management and protection of important habitats and species. However, decision makers would benefit from more profound understanding of ecosystem degradation processes and of innovative methodologies and tools for efficient mitigation and restoration. The book provides best-practice examples of sustainable river management from on-site studies, European-wide analyses and case studies from other parts of the world. This book will be of interest to researchers in the field of aquatic ecology, river system functioning, conservation and restoration, to postgraduate students, to institutions involved in water management, and to water related industries.
Author :
Publisher :
ISBN 13 :
Total Pages : 113 pages
Book Rating : 4.:/5 (11 download)
Download or read book Sources and Transport of Nutrients, Organic Carbon, and Chlorophyll-a in the San Joaquin River Upstream of Vernalis, California, During Summer and Fall, 2000 and 2001 written by and published by . This book was released on 2004 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Krittika Govil
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (92 download)
Download or read book Determining Sources of Dissolved Organic Carbon and Nutrients in an Urban Basin Using Novel and Traditional Methods written by Krittika Govil and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Water quality in urban ecosystems is sensitive to localized disturbances potentially affecting those mechanisms which influence nutrient cycles. The Carters Creek Basin has been reported to have elevated concentrations of dissolved organic carbon (DOC). In combination with high terrestrial nutrient export from non-point sources and point source effluent discharge, this has been suggested to contribute to E.Coli recovery and regrowth. Spatial identification of loading "hot-spots" or locations of elevated nutrient concentrations of non-point, terrestrial sources may provide critical information necessary for appropriate mitigation efforts and watershed management. This study used traditional and novel methods for source tracking nutrients and dissolved organic carbon in small urban and rural watersheds in Brazos County, Texas. A nested watershed approach allowed identification of problem areas of nutrient loading. A novel cost-effective technique using diffuse reflectance near-infrared spectroscopy was used to identify sources of DOC. Monthly stream sampling was conducted at 12 sites from 2012 to 2013. Impacts of human activity on landscape features determining source pathways for nutrient retention, transport, and conversion were identified in this study. Higher nitrate-N (0.12-22.8 mg L−1), orthophosphate-P (0.11-3.60mgL−1), and DOC concentrations (18.6-68.1 mg L−1) were found across the watershed than in 2007. Factors such as increased erosion, sodic soil dispersion, land use, and flow conditions wereidentified as possible causes for increased carbon (C), nitrogen (N) and phosphorus (P) observed in the basin. This study supported the use of near-infrared spectroscopy to elucidate watershed sources of carbon. The major sources of DOC into the Carter Creek basin watersheds were leachate from soil and turfgrass. Rural subwatersheds had less complicated source signatures than their urban counterparts. Urban impervious runoff signatures also clustered with stream water signatures, especially during high flow in October and September. These results indicate that specific vegetation such as turfgrass used for landscapes in urban watersheds coupled with sodic irrigation may alter traditional nitrogen, phosphorus and carbon cycling in urbanizing watersheds. Spatial source tracking will enable efficient pollution mitigation and protect water quality as a result of this study. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/152459
Author : Robert G. Wetzel
Publisher : Academic Press
ISBN 13 : 0080574394
Total Pages : 1023 pages
Book Rating : 4.0/5 (85 download)
Download or read book Limnology written by Robert G. Wetzel and published by Academic Press. This book was released on 2001-05-10 with total page 1023 pages. Available in PDF, EPUB and Kindle. Book excerpt: Limnology is the study of the structural and functional interrelationships of organisms of inland waters as they are affected by their dynamic physical, chemical, and biotic environments. Limnology: Lake and River Ecosystems, Third Edition, is a new edition of this established classic text. The coverage remains rigorous and uncompromising and has been thoroughly reviewed and updated with evolving recent research results and theoretical understanding. In addition, the author has expanded coverage of lakes to reservoir and river ecosystems in comparative functional analyses.
Author : Dennis A. Hansell
Publisher : Academic Press
ISBN 13 : 0124071538
Total Pages : 712 pages
Book Rating : 4.1/5 (24 download)
Download or read book Biogeochemistry of Marine Dissolved Organic Matter written by Dennis A. Hansell and published by Academic Press. This book was released on 2014-10-02 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine dissolved organic matter (DOM) is a complex mixture of molecules found throughout the world's oceans. It plays a key role in the export, distribution, and sequestration of carbon in the oceanic water column, posited to be a source of atmospheric climate regulation. Biogeochemistry of Marine Dissolved Organic Matter, Second Edition, focuses on the chemical constituents of DOM and its biogeochemical, biological, and ecological significance in the global ocean, and provides a single, unique source for the references, information, and informed judgments of the community of marine biogeochemists. Presented by some of the world's leading scientists, this revised edition reports on the major advances in this area and includes new chapters covering the role of DOM in ancient ocean carbon cycles, the long term stability of marine DOM, the biophysical dynamics of DOM, fluvial DOM qualities and fate, and the Mediterranean Sea. Biogeochemistry of Marine Dissolved Organic Matter, Second Edition, is an extremely useful resource that helps people interested in the largest pool of active carbon on the planet (DOC) get a firm grounding on the general paradigms and many of the relevant references on this topic. Features up-to-date knowledge of DOM, including five new chapters The only published work to synthesize recent research on dissolved organic carbon in the Mediterranean Sea Includes chapters that address inputs from freshwater terrestrial DOM
Author :
Publisher :
ISBN 13 :
Total Pages : 592 pages
Book Rating : 4.:/5 (319 download)
Download or read book U.S. Geological Survey Water-supply Paper written by and published by . This book was released on 1982 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Catherine Grace Winters
Publisher :
ISBN 13 : 9781369354133
Total Pages : 204 pages
Book Rating : 4.3/5 (541 download)
Download or read book Pulse of the Stream written by Catherine Grace Winters and published by . This book was released on 2016 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biotic and abiotic factors both play critical roles in the cycling of organic matter and nutrients in aquatic ecosystems. Understanding the relative control of these factors on solute fate and transport in fluvial systems is important for understanding how climatic changes can affect water quality. Many processes that control solute cycling in streams occur at sub-daily scales, making high-frequency, in situ, sub-hourly measurements important for capturing the response of dissolved organic matter and nutrients to changes in the strength of controlling processes. The tightly coupled aquatic and terrestrial environments present in headwater streams make them particularly useful systems for studying high-frequency changes in water chemistry. In this study, we examined the patterns of dissolved organic carbon, nitrate, dissolved oxygen, temperature, dissolved organic matter fluorescence, and stream discharge using in-stream measurements at sub-hourly to monthly time scales to understand the daily and seasonal controls of aquatic organic matter and nutrient processing. We also conducted a laboratory incubation to measure the effects of dissolved organic carbon and nutrient treatments on consumption of carbon and nitrogen in our system. Our main objectives were to identify: 1) the relative controls of diel biotic and abiotic processes on stream dissolved organic carbon and nitrate-N; and 2) the mechanisms controlling rapid autumnal changes in dissolved organic carbon and nitrate-N in stream runoff. We found that hydrology plays a key role in transporting solutes to a forested headwater stream in the Piedmont Region, Maryland; however, once solutes reach the stream biotic controls dominate the stream solute patterns. Biology is an important regulator of diel patterns of streamwater dissolved organic carbon and nitrate concentrations during springtime and autumn leaf fall. Diel cycling is most apparent during the spring prior to leaf out when the water temperature is increasing. Where patterns were evident, nitrate (annual average in second order stream: 17:00) and discharge (17:28) reached their minimums during the afternoon within a few hours of the peaks in dissolved oxygen (13:16), temperature (15:17), dissolved organic carbon (16:06), and dissolved organic matter fluorescence (17:23). Larger amplitudes of dissolved oxygen, nitrate, dissolved organic carbon, and dissolved organic matter fluorescence correspond with larger daily temperature changes. Laboratory incubations showed increased consumption of nitrogen in the presence of labile carbon, but not in the presence of labile carbon plus nutrients, which indicates our system is carbon limited. Autumn dissolved organic carbon and nitrate dynamics also indicate our system is carbon limited. Increased rates of leaf litter fall corresponded with increased consumption of stream nitrate leading to a late October depression, or annual minimum, in nitrate concentration. Storm events accelerated the recovery of stream nitrate to early autumn concentrations as nitrate was mobilized and transported from soils to the stream. Hydrology is important for solute transport to and export from the stream. Autotrophic activity dominates on the daily scale, while heterotrophic activity controls seasonal responses in organic matter and nutrient cycling in this forested watershed. Carbon and nitrogen dynamics have been studied in other forested systems, as well, but the controlling processes vary among these watershed. Our results highlight the importance of understanding controlling processes within specific watersheds when making large scale predictions of the potential export of carbon and nitrogen from forested systems.
Author :
Publisher :
ISBN 13 :
Total Pages : 260 pages
Book Rating : 4.3/5 (126 download)
Download or read book Geological Survey Water-supply Paper written by and published by . This book was released on 1983 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (715 download)
Download or read book Détermination des besoins urgents en recherche en Suisse written by and published by . This book was released on 1970 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309069483
Total Pages : 422 pages
Book Rating : 4.3/5 (9 download)
Download or read book Clean Coastal Waters written by National Research Council and published by National Academies Press. This book was released on 2000-08-17 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental problems in coastal ecosystems can sometimes be attributed to excess nutrients flowing from upstream watersheds into estuarine settings. This nutrient over-enrichment can result in toxic algal blooms, shellfish poisoning, coral reef destruction, and other harmful outcomes. All U.S. coasts show signs of nutrient over-enrichment, and scientists predict worsening problems in the years ahead. Clean Coastal Waters explains technical aspects of nutrient over-enrichment and proposes both immediate local action by coastal managers and a longer-term national strategy incorporating policy design, classification of affected sites, law and regulation, coordination, and communication. Highlighting the Gulf of Mexico's "Dead Zone," the Pfiesteria outbreak in a tributary of Chesapeake Bay, and other cases, the book explains how nutrients work in the environment, why nitrogen is important, how enrichment turns into over-enrichment, and why some environments are especially susceptible. Economic as well as ecological impacts are examined. In addressing abatement strategies, the committee discusses the importance of monitoring sites, developing useful models of over-enrichment, and setting water quality goals. The book also reviews voluntary programs, mandatory controls, tax incentives, and other policy options for reducing the flow of nutrients from agricultural operations and other sources.
Author :
Publisher : American Geophysical Union
ISBN 13 :
Total Pages : 289 pages
Book Rating : 4./5 ( download)
Download or read book Arctic Oceanography written by and published by American Geophysical Union. This book was released on 1995 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 806 pages
Book Rating : 4.3/5 (91 download)
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C. R. Krishna Murti
Publisher : Northern Book Centre
ISBN 13 : 9788172110215
Total Pages : 284 pages
Book Rating : 4.1/5 (12 download)
Download or read book The Ganga, a Scientific Study written by C. R. Krishna Murti and published by Northern Book Centre. This book was released on 1991 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Ganga: A Scientific Study is based on an Integrated Research Programme carried out by 14 Universities located in the Ganga Basin sponsored and funded by the Envioronment Research Committee and The Ganga Project Directorate, Ministry of Environment & Forests, Government of India, New Delhi. The Ganga, one of World's major rivers, has been venerated as the holiest and is bound with countless beliefs and faiths especially in India and adjacent countries. Its water has traditionally been regarded as an inexhaustible gift of nature. Recent experiences do not, however, warrant such a complacency. The water resources are strained to a non-sustainable level due to rapid population explosion, urbanisation, development of agriculture, industry, livestock and power production in the Ganga basin. The hydrobiological quality of water has deteriorated and yet no concise, valid supporting evidence was available in a comprehensive manner covering the entire river. This book is an attempt towards this direction. For the first time a picture of the Ganga is available with its physico-chemical and biological charateristics, the severe pollution stress and causes to which its water is subjected to, the contents and quality of water and possible remedial measures. An account of algae including pollution sensitive and tolerant species, besides bio-indicators is available. A possible modelling exercise has also been included. A microbiological assay and the bacteria present in the river water is also given. This book, in short, is a synthesis of what the Ganga is at present in respect of its hydrobiology, pollution load, and some aspects of hydrology.
Author :
Publisher :
ISBN 13 :
Total Pages : 606 pages
Book Rating : 4.3/5 (91 download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 1144 pages
Book Rating : 4.:/5 (31 download)
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
