Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Using Excess Radon 222 To Assess Submarine Groundwater Discharge In The Delaware River And Bay Estuary
Download Using Excess Radon 222 To Assess Submarine Groundwater Discharge In The Delaware River And Bay Estuary full books in PDF, epub, and Kindle. Read online Using Excess Radon 222 To Assess Submarine Groundwater Discharge In The Delaware River And Bay Estuary ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Using Excess Radon-222 to Assess Submarine Groundwater Discharge in the Delaware River and Bay Estuary by : Matthew Charles Schwartz
Download or read book Using Excess Radon-222 to Assess Submarine Groundwater Discharge in the Delaware River and Bay Estuary written by Matthew Charles Schwartz and published by . This book was released on 2001 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Submarine Groundwater Discharge: Impacts on Coastal Ecosystem by Hidden Water and Dissolved Materials by : Makoto Taniguchi
Download or read book Submarine Groundwater Discharge: Impacts on Coastal Ecosystem by Hidden Water and Dissolved Materials written by Makoto Taniguchi and published by Frontiers Media SA. This book was released on 2021-03-03 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Treatise on Estuarine and Coastal Science by :
Download or read book Treatise on Estuarine and Coastal Science written by and published by Academic Press. This book was released on 2012-03-06 with total page 4604 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of estuaries and coasts has seen enormous growth in recent years, since changes in these areas have a large effect on the food chain, as well as on the physics and chemistry of the ocean. As the coasts and river banks around the world become more densely populated, the pressure on these ecosystems intensifies, putting a new focus on environmental, socio-economic and policy issues. Written by a team of international expert scientists, under the guidance of Chief Editors Eric Wolanski and Donald McClusky, the Treatise on Estuarine and Coastal Science, Ten Volume Set examines topics in depth, and aims to provide a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Most up-to-date reference for system-based coastal and estuarine science and management, from the inland watershed to the ocean shelf Chief editors have assembled a world-class team of volume editors and contributing authors Approach focuses on the physical, biological, chemistry, ecosystem, human, ecological and economics processes, to show how to best use multidisciplinary science to ensure earth's sustainability Provides a comprehensive scientific resource for all professionals and students in the area of estuarine and coastal science Features up-to-date chapters covering a full range of topics
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Submarine Groundwater Discharge and Its Ecological Influences Revealed by Coupling Radon-222, Thermal Remote Sensing of Satellite and Unmanned Aerial Vehicles Model by : 程愷豪
Download or read book Submarine Groundwater Discharge and Its Ecological Influences Revealed by Coupling Radon-222, Thermal Remote Sensing of Satellite and Unmanned Aerial Vehicles Model written by 程愷豪 and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using Radium and Radon to Evaluate Ground Water Discharge and Benthic Exchange in Upper Newport Bay, California by : Madeline Breeze Worsnopp
Download or read book Using Radium and Radon to Evaluate Ground Water Discharge and Benthic Exchange in Upper Newport Bay, California written by Madeline Breeze Worsnopp and published by . This book was released on 2007 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Submarine Groundwater Discharge on a Semi-arid Island (Santa Catalina, California) by : Mitsuyo Tsuda (Graduate student)
Download or read book Submarine Groundwater Discharge on a Semi-arid Island (Santa Catalina, California) written by Mitsuyo Tsuda (Graduate student) and published by . This book was released on 2021 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Quantifying the freshwater component of submarine groundwater discharge (SGD) is critical in the analysis of terrestrial influences on marine ecosystems and in assessing the water budget of coastal aquifers. In semi-arid to arid settings, this quantification is difficult because low SGD rates translate into low concentrations of groundwater solutes in coastal waters. In this study, fresh SGD (FSGD) was quantified for Toyon Bay on Catalina Island, California, for wet and dry seasons using a combination of radon and salinity mass balance models, and the results were compared to the watershed-specific groundwater recharge rates obtained from a soil water balance (SWB) model. Calculated FSGD rates vary with season (high in spring, low in fall) and fall short of the modeled recharge rates by a factor of up to 7. While sensitivity analyses revealed FSGD estimates to be significantly influenced by uncertainties in geochemical variability of the groundwater end-member and fluctuations of water depth, the results of this study do not support the SWB model-based recharge rates. The findings of this study highlight the utility of the radon and salinity mass balance-based FSGD estimates as groundwater recharge calibration targets, which may aid in the establishment of more refined sustainable groundwater yields.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2001 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coupled Radon, Methane and Nitrate Sensors for Large-scale Assessment of Groundwater Discharge and Non-point Source Pollution to Coastal Waters by : Henrieta Dulaiova
Download or read book Coupled Radon, Methane and Nitrate Sensors for Large-scale Assessment of Groundwater Discharge and Non-point Source Pollution to Coastal Waters written by Henrieta Dulaiova and published by . This book was released on 2010 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract.--We constructed a survey system of radon/methane/nitrate/salinity to find sites of submarine groundwater discharge (SGD) and groundwater nitrate input. We deployed the system in Waquoit Bay and Boston Harbor, MA where we derived SGD rates using a mass balance of radon with methane serving as a fine resolution qualitative indicator of groundwater. In Waquoit Bay we identified several locations of enhanced groundwater discharge, out of which two (Childs and Quashnet Rivers) were studied in more detail. The Childs River was characterized by high nitrate input via groundwater discharge, while the Quashnet River SGD was notable but not a significant source of nitrate. Our radon survey of Boston Harbor revealed several sites with significant SGD, out of these Inner Harbor and parts of Dorchester Bay and Quincy Bay had groundwater fluxes accompanied by significant water column nitrogen concentrations. The survey system has proven effective in revealing areas of SGD and non-point source pollution.
Book Synopsis Estimation of Submarine Groundwater Discharge Into Tolo Harbour by : Kiu-Chung Tse
Download or read book Estimation of Submarine Groundwater Discharge Into Tolo Harbour written by Kiu-Chung Tse and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Estimation of Submarine Groundwater Discharge Into Tolo Harbour" by Kiu-chung, Tse, 謝喬中, 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: Abstract of thesis entitled ESTIMATION OF SUBMARINE GROUNDWATER DISCHARGE INTO TOLO HARBOUR Submitted by KIU CHUNG TSE for the degree of Master of Philosophy at The University of Hong Kong in August 2006 The ecological impact of algal blooms in Tolo Harbour has received much attention. Nutrients such as N, P and Si are consented to be the limiting factors for algal blooms. This study aims to quantify the submarine groundwater discharge (SGD) flux discharging to Tolo Harbour and ultimately, to assess the ecological consequence of nutrient input through this underground route. SGD is assessed by radium isotopes and radon in this study. In 2005, seawater samples were collected for radium isotopic analysis in March and October, while a site in Plover Cove was selected for radon analysis in July 222 during the neap tide and spring tide periods. Temporal distributions of Rn 224 and Ra show an inverse relationship with the tidal height, which are 224 believed to reflect the tidal effects on SGD. Spatial distribution of Ra shows a prominent decreasing trend with distance offshore except for a site in Sha Tin Hoi, where SGD as the form of submarine groundwater spring is 224 suspected to exist at the bifurcation of two faults. Enrichment of Ra nearshore was speculated to be attributed to rivers and SGD. Based on the 224 Ra data, the residence time of radium in Tolo Harbour was estimated to be 46 days. Direct measurement by seepage meter in Plover Cove gives an average value of 0.08 m/day, which is very consistent with the SGD flux estimated by 222 Rn with SGD fluid represented by groundwater sample from Chim Uk private well (0.06 m/day). For a seepage area of 200 m x 3000 m in Plover 4 3 Cove, the volumetric SGD would be 3.6-4.8 x 10 m /day. In the Ra isotopes 4 3 approach, the volumetric SGD were estimated to be 6.87 x 10 m /day for 5 3 March and 1.53 x 10 m /day for October. Approximate estimate from water balance calculation places the value of terrestrial groundwater discharge to be 4 3 3.56 x 10 m /day. Nutrients in groundwater around Tolo Harbour were measured. Estimates of nutrient loading through the pathway of SGD ranged from 0 to 29.1 kg/day for nitrite, 32 to 2326 kg/day for nitrate and 0 to 71.9 kg/day for phosphate. 226 228 Limitations of this study mainly come from Ra and Ra data in which standards were not available for calibration. In radon analysis, there are two 222 abnormal Rn values which remain unexplainable. Also, the technique to install the seepage meter is still subject to improve. On the other hand, groundwater data are too sparse to represent the SGD fluid reasonably. Despite of the limitations, nutrient loading on Tolo Harbour through the pathway of SGD is doubtless significant. Unfortunately groundwater quality has been overlooked by the government in the management of red tides in Hong Kong. Based on the result from this study, the current practice for the management of red tides in Hong Kong has to be reviewed and the control measures of groundwater contamination are obviously required. DOI: 10.5353/th_b3823092 Subjects: Groundwater disposal in rivers, lakes, etc - China - Hong Kong Groundwater ecology - China - Hong Kong Groundwater disposal in rivers, lakes, etc - Tolo Harbour Groundwater ecology - Tolo Harbour
Book Synopsis The Role of Submarine Groundwater Discharge as Material Source to the Baltic Sea by : Beata Szymczycha
Download or read book The Role of Submarine Groundwater Discharge as Material Source to the Baltic Sea written by Beata Szymczycha and published by Springer. This book was released on 2015-11-27 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a review of experimental methods and presents the worldwide newest literature regarding chemical substances fluxes via submarine groundwater discharge (SGD). Thus, the book characterizes both the distribution of chemicals in groundwater impacted areas in the Baltic Sea and their fluxes via SGD to the Baltic Sea. This book presents the state of art regarding the SGD and detailed studies on SGD characterization in the Baltic Sea. The Baltic Sea is an example of a region highly influenced by a variety of human activities that affect the ecosystem. It is shown that SGD has been proven to be one of the important sources introducing dissolved substances into the Baltic Sea. The loads of chemical substances delivered to the Baltic sea with SGD have not been quantified so far.
Book Synopsis Quantifying Groundwater Discharge to Texas Coastal Bend Estuaries by : John Arthur Breier
Download or read book Quantifying Groundwater Discharge to Texas Coastal Bend Estuaries written by John Arthur Breier and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies have provided evidence that submarine groundwater discharge is a signifi cant source of water and dissolved nutrients to the coastal ocean. The chemical implications of these studies are especially important because, relative to surface water, groundwater is typically enriched in many compounds including nitrogen bearing nutrients. Therefore by affecting the supply and relative proportions of essential nutrients, direct groundwater discharge has the potential to influence phytoplankton populations and estuarine ecosystems as a whole. Another potential submarine discharge that may occur in the shallow restricted waters of the Texas coast is leakage of oil-field brine. Such leakage also has important ecological implications similar in some ways to groundwater discharge. The studies in this dissertation concern improving the methods and techniques used in measuring submarine discharges. Using the Texas Coastal Bend as a study area I have: 1) conducted a detailed evaluation of submarine discharges to Nueces Bay and 2) compared indications of submarine discharge between Nueces, Baffin, and Copano Bays. These investigations use a combination of geochemical and geophysical techniques. The geochemical methods are based primarily on measurements of naturally-occurring dissolved Ra isotopes in samples of bay, river, ocean, and groundwater. The geophysical methods employ electrical resistivity profiling to look for evidence of groundwater movement within the bay bottom sediments. Results show that dissolved radium concentrations within Nueces Bay are among the highest observed in coastal estuaries. Geochemical analysis and geophysical surveys indicate that both groundwater and leakage of oil-field brine are potential submarine inputs. Samples from Nueces, Copano, and Baffin Bays show that the seasonal increase in dissolved 226Ra activity for Nueces Bay is substantially larger than that of the other two bays. This increase is not readily explained by either evaporation or riverine supply. These results clearly suggest that the Ra supply to Nueces Bay is unusually large. For Nueces Bay, the most relevant differences between the three bays that might account for this are 1) the proportionally larger salt marsh and 2) the higher density of petroleum wells and pipelines. Though submarine groundwater discharge is not to be ruled out, leakage of oil-field brine is strongly indicated.
Author :U.S. Department of the Interior Publisher :Createspace Independent Publishing Platform ISBN 13 :9781495925818 Total Pages :74 pages Book Rating :4.9/5 (258 download)
Book Synopsis Examining Submarine Ground-Water Discharge Into Florida Bay by Using 222RN and Continuous Resistivity Profiling by : U.S. Department of the Interior
Download or read book Examining Submarine Ground-Water Discharge Into Florida Bay by Using 222RN and Continuous Resistivity Profiling written by U.S. Department of the Interior and published by Createspace Independent Publishing Platform. This book was released on 2014-02-19 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Submarine ground-water discharge (SGD) is a widely overlooked source term for some dissolved constituents as they make their way to the nearshore marine environment (Burnett et al. 2001a, b, 2003a, b, 2006; Moore, 1996, 1999; Slomp and Van Cappellen, 2004; Swarzenski, 2004a, 2007; Taniguchi et al., 2002, 2006)
Book Synopsis The Application of a Continuous Radon Monitor for Estimation of Submarine Groundwater Discharge Rates in Coastal Marine Environments by : Michael Judd Lambert
Download or read book The Application of a Continuous Radon Monitor for Estimation of Submarine Groundwater Discharge Rates in Coastal Marine Environments written by Michael Judd Lambert and published by . This book was released on 2001 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using Radon-222 as a Tracer of Mixing Between Surface and Ground Water in the Santa Fe River Sink/rise System by : Lauren A. Smith
Download or read book Using Radon-222 as a Tracer of Mixing Between Surface and Ground Water in the Santa Fe River Sink/rise System written by Lauren A. Smith and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The difference in activities of these two end members should make 222Rn a good tracer for surface-ground water mixing in karst areas. Activities of 222Rn were measured to depths of 8 and 10 m at two sinkholes (Vinzants Landing and River Rise) and indicated that 222Rn is heterogeneous in the sinkholes. Water samples were collected from the River Sink, River Rise, and karst windows between the Sink and Rise from May 2002 to April 2003. These samples encompass drought, base flow, and flood stages. As the river stage rises to flood conditions (approx. 11.51 masl) the excess 222Rn activities decrease from approximately approx. 100 dpm/L to less than 25 dpm/L, indicating that no matrix water enters the conduit; and that the conduit is filled with 222Rn-poor surface water from the Santa Fe River.
Book Synopsis Using Direct Measurements of Submarine Groundwater Discharge to Investigate the Coupling Between Surface and Pore Waters by :
Download or read book Using Direct Measurements of Submarine Groundwater Discharge to Investigate the Coupling Between Surface and Pore Waters written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using direct measurements of submarine groundwater discharge to investigate the coupling between surface and pore waters.
