Quantifying Groundwater Discharge Into New Zealand Rivers Using Radon and Concurrent Flow Gauging PDF Download
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Author: Heather Martindale
Publisher:
ISBN: 9781988530918
Category : Groundwater
Languages : en
Pages :
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Book Description
Author: Heather Martindale
Publisher:
ISBN: 9781988530918
Category : Groundwater
Languages : en
Pages :
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Book Description
Author: Heather Martindale
Publisher:
ISBN: 9781988500034
Category : Groundwater
Languages : en
Pages : 13
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Book Description
Author: Carolyn M. Gramling
Publisher:
ISBN:
Category : Coastal ecology
Languages : en
Pages : 368
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Book Description
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.
Author: Xin Luo
Publisher: Open Dissertation Press
ISBN: 9781361008911
Category :
Languages : en
Pages :
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Book Description
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
Author: Makoto Taniguchi
Publisher: Frontiers Media SA
ISBN: 2889665356
Category : Science
Languages : en
Pages : 158
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Book Description
Author: Michael R. Rosen
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 520
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Book Description
Groundwaters of New Zealand is the definitive new source for information on the groundwater resources of New Zealand. Written by many of New Zealand's leading experts, the book covers varied aspects of groundwater research, assessment, use, and management in New Zealand. This book is divided into two parts. The first part documents the history of groundwater development in New Zealand, and current research on interactions between groundwater systems and other components of the hydrological cycle such as health, processes (recharge and groundwater-surface water interaction) and techniques (isotopic methods). The second part of the book provides up-to-date regional summaries of groundwater resources and quality in every region of the country. Groundwater quality is explored in chapters on groundwater chemistry and microbiology, and the health aspects of groundwater. The book also contains detailed regional summaries, covering the location, use, quality, and management of groundwater resources, for the entire country.This book will be the essential reference text for all environmental, engineering, and resource management professionals working with groundwater, and students of the many scientific and engineering disciplines that contribute to groundwater investigations. Many groundwater users, both practicing and in school will find this book a valuable reference that adds significantly to their understanding of groundwater resources.-back cover.
Author: Donald O. Rosenberry
Publisher: CreateSpace
ISBN: 9781500222819
Category : Technology & Engineering
Languages : en
Pages : 132
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Book Description
Interest in the use and development of our Nation's surface - and ground-water resources has increased significantly during the past 50 years. This work discusses field techniques for estimating water fluxes.
Author: Trevor Elliot
Publisher: MDPI
ISBN: 390698091X
Category : Groundwater tracers
Languages : en
Pages : 1
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Book Description
This book is a printed edition of the Special Issue "Environmental Tracers" that was published in Water
Author: Corinna Abesser
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 228
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Book Description
Selected papers from a symposium on A new Focus on Integrated Analysis of Groundwater-Surface Water Systems, held during the International Union of Geodesy and Geophysics XXIV General Assembly in Perugia, Italy, 11-13 July 2007.
Author: Peter G. Cook
Publisher: Springer Science & Business Media
ISBN: 1461545579
Category : Science
Languages : en
Pages : 545
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Book Description
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.
