A Radiocarbon Method And Multi Tracer Approach To Quantifying Groundwater Discharge To Coastal Waters

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A Radiocarbon Method and Multi-tracer Approach to Quantifying Groundwater Discharge to Coastal Waters

Author : Carolyn M. Gramling
Publisher :
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis A Radiocarbon Method and Multi-tracer Approach to Quantifying Groundwater Discharge to Coastal Waters by : Carolyn M. Gramling

Download or read book A Radiocarbon Method and Multi-tracer Approach to Quantifying Groundwater Discharge to Coastal Waters written by Carolyn M. Gramling and published by . This book was released on 2003 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater discharge into estuaries and the coastal ocean is an important mechanism for the transport of dissolved chemical species to coastal waters. Because many dissolved species are present in groundwater in concentrations that are orders of magnitude higher than typical river concentrations, groundwater-borne nutrients and pollutants can have a substantial impact on the chemistry and biology of estuaries and the coastal ocean. However, direct fluxes of groundwater into the coastal ocean (submarine groundwater discharge, or SGD) can be difficult to quantify. Geochemical tracers of groundwater discharge can reflect the cumulative SGD flux from numerous small, widely dispersed, and perhaps ephemeral sources such as springs, seeps, and diffuse discharge. The natural radiocarbon content (DELTA 14C) of dissolved inorganic carbon (DIC) was developed as a tracer of fresh, terrestrially driven fluxes from confined aquifers. This DELTA 14C method was tested during five sampling periods from November 1999 to April 2002 in two small estuaries in southeastern North Carolina. In coastal North Carolina, fresh water artesian discharge is characterized by a low DELTA 14C signature acquired from the carbonate aquifer rock. Mixing models were used to evaluate the inputs from potential sources of DIC-DELTA 14C to each estuary, including seawater, springs, fresh water stream inputs, and salt marsh respiration DIC additions. These calculations showed that artesian discharge dominated the total fresh water input to these estuaries during nearly all sampling periods. These new DELTA 14C-based SGD estimates were compared with groundwater flux estimates derived from radium isotopes and from radon-222. It is clear that these tracers reflect different components of the total SGD. This multi-tracer approach provides a comprehensive assessment of the various components contributing to the total SGD.

A Radiocarbon Method and Multi-tracer Approach to Quantifying Groundwater Discharge to Coastal Waters

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (659 download)

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Book Synopsis A Radiocarbon Method and Multi-tracer Approach to Quantifying Groundwater Discharge to Coastal Waters by :

Download or read book A Radiocarbon Method and Multi-tracer Approach to Quantifying Groundwater Discharge to Coastal Waters written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work was funded by grants from the Rinehart Coastal Research Center/Coastal Ocean Institute at WHOI (RCRC/COI Awards 25035057, 27040014 and 27040048), WHOI SeaGrant Project R/-47, the National Ocean Sciences Accelerator Mass Spectrometer at WHOI, and the WHOI Academic Programs Office and its Ocean Ventures Fund.

Dissertation Abstracts International

Author :
Publisher :
ISBN 13 :
Total Pages : 882 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Dissertation Abstracts International by :

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Groundwater Discharge Quantification in Marine, and Desert Environments Using Radium Quartet, Radon-222 and Stable Isotopes

Author : Xin Luo
Publisher :
ISBN 13 : 9781361008928
Total Pages : pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Groundwater Discharge Quantification in Marine, and Desert Environments Using Radium Quartet, Radon-222 and Stable Isotopes by : Xin Luo

Download or read book Groundwater Discharge Quantification in Marine, and Desert Environments Using Radium Quartet, Radon-222 and Stable Isotopes written by Xin Luo and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Groundwater Discharge Quantification in Marine, and Desert Environments Using Radium Quartet, Radon-222 and Stable Isotopes" by Xin, Luo, 羅新, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Groundwater discharge is an important component of global water cycle. Along with groundwater discharge, large amount of chemicals are transported and loaded into surface waters. This thesis investigates groundwater discharge in both terrestrial and marine environments using isotopic approaches. Radium quartet and radon-222 (222Rn), highly concentrated in groundwater and conservatively behaving during the transport, are proved to be effective tracers in quantifying groundwater discharge in various environments. Stable isotopes (δ 18O and δ 2H), significantly fractionated during evaporation, are useful and applicable in studying the water balance in arid waters. Groundwater discharge is an important component of global water cycle. Along with groundwater discharge, large amount of chemicals are transported and loaded into surface waters. This thesis investigates groundwater discharge in both terrestrial and marine environments using isotopic approaches. Radium quartet and radon-222 (222Rn), highly concentrated in groundwater and conservatively behaving during the transport, are proved to be effective tracers in quantifying groundwater discharge in various environments. Stable isotopes (δ 18O and δ 2H), significantly fractionated during evaporation, are useful and applicable in studying the water balance in arid waters. Desert lakes, lacking of surface runoff, are mostly supplied by groundwater discharge. These lakes play a vital role in maintaining desert water balance, creating unique landscapes, supporting distinctive ecosystems. In this thesis, radium quartet, 222Rn, δ 18O and δ 2H are used to estimate groundwater discharge into the Badain Jaran Desert (BJD) lakes and to reveal these lake evolutions. Most of the desert lakes are flow through lakes, reflecting groundwater discharge is larger than lake surface evaporation and explaining their existence in the extremely arid environment. The salinazation time of the desert lakes is estimated to start about 4000 yrs B.P. Radium and radon disequilibrium in the fractured aquifer system is used to estimate the hydrogeological parameters such as water residence time, effective surface area and mean aperture, based on long time monitoring of radium and radon activities in the spring water. Adsorption exerts a dominant effect in controlling radium quartet transport in fracture aquifer system. Subjects: Groundwater flow - Measurement

Gulf of Mexico Origin, Waters, and Biota

Author : Thomas S. Bianchi
Publisher : Texas A&M University Press
ISBN 13 : 1623497752
Total Pages : 697 pages
Book Rating : 4.6/5 (234 download)

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Book Synopsis Gulf of Mexico Origin, Waters, and Biota by : Thomas S. Bianchi

Download or read book Gulf of Mexico Origin, Waters, and Biota written by Thomas S. Bianchi and published by Texas A&M University Press. This book was released on 2019-10-03 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fifth volume in the Harte Research Institute’s landmark scientific series on the Gulf of Mexico provides the first comprehensive study that covers the major core subjects of chemical oceanography in the Gulf. It synthesizes a tremendous amount of established research, together with the most recent information emerging from studies conducted during and after the Macondo Well oil spill that resulted from the explosion of the Deepwater Horizon drilling platform. Situated within the boundaries of a changing semi-tropical region, the Gulf of Mexico is a particularly important body to its bordering countries—the United States, Mexico, and Cuba—and directly influences the economies of these nations through shipping, oil and gas extraction, mineral mining, fisheries, and myriad ecosystem services and recreational opportunities. The changing chemistry of the Gulf also has wide-ranging effects on weather patterns as many of the hurricanes that reach land in the US and Mexico pass through this ocean basin. We are already seeing some of the consequences of climate change, including, to name one example, the increased frequency of harmful algal blooms, the cause of which is still unknown in most cases. This book brings together a team of expert chemical oceanographers from the US and Mexico to provide a foundational understanding of the complex chemistry of North America’s only marginal sea. Gulf of Mexico Origin, Waters, and Biota: Volume 5, Chemical Oceanography serves as an important reference for understanding the basic science, management, and economic issues facing the Gulf of Mexico while pointing out key topics in critical need of additional research.

A Rapid Method for Measuring Local Groundwater-surface Water Interactions and Identifying Potential Non-point Source Pollution Inputs to Rivers

Download A Rapid Method for Measuring Local Groundwater-surface Water Interactions and Identifying Potential Non-point Source Pollution Inputs to Rivers PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : 86 pages
Book Rating : 4.:/5 (85 download)

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Book Synopsis A Rapid Method for Measuring Local Groundwater-surface Water Interactions and Identifying Potential Non-point Source Pollution Inputs to Rivers by :

Download or read book A Rapid Method for Measuring Local Groundwater-surface Water Interactions and Identifying Potential Non-point Source Pollution Inputs to Rivers written by and published by . This book was released on 2008 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agriculture in the Central Valley of California is a potential contributor of non-point source pollution to surface waters via the groundwater pathway. This work presents a relatively simple method and inexpensive apparatus for quantifying local groundwater discharge into rivers using heat as a tracer. Two transects along a known gaining reach of the Lower Merced River were used to evaluate the effectiveness of the groundwater discharge monitoring instruments, known as Temperature Javelins, over three months. In terms of fulfilling deployment objectives, Temperature Javelins proved to be low cost, easy to install, and yielded easily interpretable data related to groundwater-surface water discharges. Groundwater discharge velocities were found to vary over time seasonally and spatially (on a scale of meters). Discharges ranged from 0.1 to 6.8 cm/day with higher discharge velocities found on the northern side of the river. These values are consistent with previous values obtained at the same site using other methods. Corresponding hyporheic water samples were collected to investigate solute transport (specifically nitrate) by the discharging water. Nitrate concentrations ranged from nondetectable to 50 ppm in these samples, where elevated values appear to be associated with groundwater entering on the north side of the river. Elevated nitrate flow lines in the hyporheic zone correspond with high discharge areas and alternate with ammonium enriched columns and low groundwater discharge. It is hypothesized that nitrification cells are induced by groundwater-surface water interactions. Testing of this hypothesis is proposed as a subject of further research.

Environmental Tracers

Author : Trevor Elliot
Publisher : MDPI
ISBN 13 : 390698091X
Total Pages : 1 pages
Book Rating : 4.9/5 (69 download)

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Book Synopsis Environmental Tracers by : Trevor Elliot

Download or read book Environmental Tracers written by Trevor Elliot and published by MDPI. This book was released on 2018-10-08 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Environmental Tracers" that was published in Water

Environmental Tracers in Subsurface Hydrology

Author : Peter G. Cook
Publisher : Springer Science & Business Media
ISBN 13 : 1461545579
Total Pages : 545 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Environmental Tracers in Subsurface Hydrology by : Peter G. Cook

Download or read book Environmental Tracers in Subsurface Hydrology written by Peter G. Cook and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Tracers in Subsurface Hydrology synthesizes the research of specialists into a comprehensive review of the application of environmental tracers to the study of soil water and groundwater flow. The book includes chapters which cover ionic tracers, noble gases, chlorofluorocarbons, tritium, chlorine-36, oxygen-18, deuterium, and isotopes of carbon, strontium, sulphur and nitrogen. Applications of the tracers include the estimation of vertical and horizontal groundwater velocities, groundwater recharge rates, inter-aquifer leakage and mixing processes, chemical processes and palaeohydrology. Practicing hydrologists, soil physicists and hydrology professors and students will find the book to be a valuable support in their work.

Southeastern Geology

Author :
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Southeastern Geology by :

Download or read book Southeastern Geology written by and published by . This book was released on 2004 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Isotope Methods for Dating Old Groundwater

Author : International Atomic Energy Agency
Publisher :
ISBN 13 : 9789201372109
Total Pages : 0 pages
Book Rating : 4.3/5 (721 download)

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Book Synopsis Isotope Methods for Dating Old Groundwater by : International Atomic Energy Agency

Download or read book Isotope Methods for Dating Old Groundwater written by International Atomic Energy Agency and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guidebook provides theoretical and practical information for using a variety of isotope tracers for dating old groundwater, i.e. water stored in geological formations for periods ranging from about 1000 to one million years. Theoretical underpinnings of the methods and guidelines for their use in different hydrogeological environments are described. The guidebook also presents a number of case studies providing insight into how various isotopes have been used in aquifers around the world. The methods, findings and conclusions presented in this publication will enable students and practicing groundwater scientists to evaluate the use of isotope dating tools for specific issues related to the assessment and management of groundwater resources. In addition, the guidebook will be of use to the scientific community interested in issues related to radioactive waste disposal in geological repositories.

Groundwater Age

Author : Gholam A. Kazemi
Publisher : John Wiley & Sons
ISBN 13 : 0471929484
Total Pages : 347 pages
Book Rating : 4.4/5 (719 download)

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Book Synopsis Groundwater Age by : Gholam A. Kazemi

Download or read book Groundwater Age written by Gholam A. Kazemi and published by John Wiley & Sons. This book was released on 2006-06-30 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Groundwater Age is the first book of its kind that incorporates and synthesizes the state-of-the-art knowledge about the business of groundwater dating - including historical development, principles, applications, various methods, and likely future progress in the concept. It is a well-organized, advanced, clearly written resource for all the professionals, scientists, graduate students, consultants, and water sector managers who deal with groundwater and who seek a comprehensive treatment of the subject of groundwater age.

Isotopes in the Water Cycle

Author : Pradeep K. Aggarwal
Publisher : Springer Science & Business Media
ISBN 13 : 1402030231
Total Pages : 377 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Isotopes in the Water Cycle by : Pradeep K. Aggarwal

Download or read book Isotopes in the Water Cycle written by Pradeep K. Aggarwal and published by Springer Science & Business Media. This book was released on 2006-01-16 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental isotope and nuclear techniques provide unmatched insights into the processes governing the water cycle and its variability. This monograph presents state of the art applications and new developments of isotopes in hydrology, environmental disciplines and climate change studies. Coverage ranges from the assessment of groundwater resources in terms of recharge and flow regime to studies of the past and present global environmental and climate changes.

Residence Times and Nitrate Transport in Ground Water Discharging to Streams in the Chesapeake Bay Watershed

Author :
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Residence Times and Nitrate Transport in Ground Water Discharging to Streams in the Chesapeake Bay Watershed by :

Download or read book Residence Times and Nitrate Transport in Ground Water Discharging to Streams in the Chesapeake Bay Watershed written by and published by . This book was released on 2003 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Coastal Hydrogeology

Author : Jimmy Jiao
Publisher : Cambridge University Press
ISBN 13 : 1107030595
Total Pages : 421 pages
Book Rating : 4.1/5 (7 download)

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Book Synopsis Coastal Hydrogeology by : Jimmy Jiao

Download or read book Coastal Hydrogeology written by Jimmy Jiao and published by Cambridge University Press. This book was released on 2019-05-09 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Offers a comprehensive volume discussing groundwater problems in coastal areas, spanning fundamental science to practical water management.

Investigative Strategies for Lead-Source Attribution at Superfund Sites Associated with Mining Activities

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309465567
Total Pages : 113 pages
Book Rating : 4.3/5 (94 download)

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Book Synopsis Investigative Strategies for Lead-Source Attribution at Superfund Sites Associated with Mining Activities by : National Academies of Sciences, Engineering, and Medicine

Download or read book Investigative Strategies for Lead-Source Attribution at Superfund Sites Associated with Mining Activities written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-12-01 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Superfund program of the US Environmental Protection Agency (EPA) was created in the 1980s to address human-health and environmental risks posed by abandoned or uncontrolled hazardous-waste sites. Identification of Superfund sites and their remediation is an expensive multistep process. As part of this process, EPA attempts to identify parties that are responsible for the contamination and thus financially responsible for remediation. Identification of potentially responsible parties is complicated because Superfund sites can have a long history of use and involve contaminants that can have many sources. Such is often the case for mining sites that involve metal contamination; metals occur naturally in the environment, they can be contaminants in the wastes generated at or released from the sites, and they can be used in consumer products, which can degrade and release the metals back to the environment. This report examines the extent to which various sources contribute to environmental lead contamination at Superfund sites that are near lead-mining areas and focuses on sources that contribute to lead contamination at sites near the Southeast Missouri Lead Mining District. It recommends potential improvements in approaches used for assessing sources of lead contamination at or near Superfund sites.

Estimation of Natural Groundwater Recharge

Author : I. Simmers
Publisher : Springer Science & Business Media
ISBN 13 : 9401577803
Total Pages : 503 pages
Book Rating : 4.4/5 (15 download)

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Book Synopsis Estimation of Natural Groundwater Recharge by : I. Simmers

Download or read book Estimation of Natural Groundwater Recharge written by I. Simmers and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: In view of the rapidly expanding urban, industrial and agri cultural water requirements in many areas and the normally associated critical unreliability of surface water supplies in arid and semi-arid zones, groundwater exploration and use is of fundamental importance for logical economic development. Two interrelated facets should be evident in all such groundwater projects : (a) definition of groundwater recharge mechanisms and characteristics for identified geological formations, in order to determine whether exploitation in the long-term involves 'mining' of an es sentially 'fossil' resource or withdrawal from a dynamic supply. A solution to this aspect is essential for development of a re source management policy: (b) determination of recharge variability in time and space to thus enable determination of total aquifer input and to quantify such practical aspects as 'minimum risk' waste disposal locations and artificial recharge potential via (e.g.) devegetation or engi neering works. However, current international developments relating to natural recharge indicate the following 'problems' ; no single comprehensive estimation technique can yet be iden tified from the spectrum of methods available; all are reported to give suspect results.

Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms

Author : Babin, Marcel
Publisher : UNESCO
ISBN 13 : 9231040421
Total Pages : 880 pages
Book Rating : 4.2/5 (31 download)

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Book Synopsis Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms by : Babin, Marcel

Download or read book Real-time Coastal Observing Systems for Marine Ecosystem Dynamics and Harmful Algal Blooms written by Babin, Marcel and published by UNESCO. This book was released on 2008-06-05 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proliferation of harmful phytoplankton in marine ecosystems can cause massive fish kills, contaminate seafood with toxins, impact local and regional economies and dramatically affect ecological balance. Real-time observations are essential for effective short-term operational forecasting, but observation and modelling systems are still being developed. This volume provides guidance for developing real-time and near real-time sensing systems for observing and predicting plankton dynamics, including harmful algal blooms, in coastal waters. The underlying theory is explained and current trends in research and monitoring are discussed.Topics covered include: coastal ecosystems and dynamics of harmful algal blooms; theory and practical applications of in situ and remotely sensed optical detection of microalgal distributions and composition; theory and practical applications of in situ biological and chemical sensors for targeted species and toxin detection; integrated observing systems and platforms for detection; diagnostic and predictive modelling of ecosystems and harmful algal blooms, including data assimilation techniques; observational needs for the public and government; and future directions for research and operations.