Groundwater Monitoring & Remediation最新文献

{"title":"Innovative Contaminant Mass Flux Monitoring in an Aquifer Subject to Tidal Effects","authors":"P. Jamin, F. Cosme, Pierre Briers, P. Orban, Ken De Greene, S. Brouyère","doi":"10.1111/gwmr.12366","DOIUrl":"https://doi.org/10.1111/gwmr.12366","url":null,"abstract":"Exposure from groundwater contamination to aquatic receptors residing in receiving surface water is dependent upon the rate of contaminated groundwater discharge. Characterization of groundwater fluxes is challenging, especially in coastal environments where tidal fluctuations result in transient groundwater flows towards these receptors. This can also be further complicated by the high spatial heterogeneity of subsurface deposits enhanced by anthropogenic influences such as the mixing of natural sediments and backfill materials, the presence of subsurface built structures such as sheet pile walls or even occurrence of other sources of contaminant discharge. In this study, the finite volume point dilution method (FVPDM) was successfully used to characterize highly transient groundwater flows and contaminant mass fluxes within a coastal groundwater flow system influenced by marked tides. FVPDM tests were undertaken continuously for more than 48 h at six groundwater monitoring wells, in order to evaluate groundwater flow dynamics during several tide cycles. Contaminant concentrations were measured simultaneously which allowed calculating contaminant mass fluxes. The study highlighted the importance of the aquifer heterogeneity, with groundwater fluxes ranging from 10−7 to 10−3 m/s. Groundwater flux monitoring enabled a significant refinement of the conceptual site model, including the fact that inversion of groundwater fluxes was not observed at high tide. Results indicated that contaminant mass fluxes were particularly higher at a specific monitoring well, by more than three orders of magnitude, than at other wells of the investigated aquifer. This study provided crucial information for optimizing further field investigations and risk mitigation measures.","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116326814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Featured Products","authors":"Zero Compromise, Infinite Possibilities","doi":"10.1111/gwmr.12367","DOIUrl":"https://doi.org/10.1111/gwmr.12367","url":null,"abstract":"Cascadian Water’s Softeners Neutralize Hardness Minerals, Create Soft Water Cascadian Water’s Simple PolyHalt ion bond softening improves most everything. PolyHalt bonds with hardness minerals to neutralize them, creating soft water without salt, power, or wastewater. Softeners are lower cost and lower maintenance, smaller sized, ecofriendly, safe for plants and pets, do not cause the slippery feeling or salty taste, and do not require special knowledge to install or maintain. There is also optional sediment or carbon treatment with softening. Manufactured by Cascadian Water since 2011, PolyHalt softeners are now available throughout the United States and Canada. www.cascadianwater.com Small-Diameter Javelin Wireline Logging Tool Allows Measuring Wide Range of Borehole Sizes","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115021197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioremediation of 1,4‐Dioxane: Successful Demonstration of In Situ and Ex Situ Approaches","authors":"J. Horst, C. Bell, Andrew Lorenz, M. Heintz, Yu Miao, Jackie Saling, Dave Favero, Shaily Mahendra","doi":"10.1111/gwmr.12354","DOIUrl":"https://doi.org/10.1111/gwmr.12354","url":null,"abstract":"This column reviews the general features of PHT3D Version 2, a reactive multicomponent transport model that couples the geochemical modeling software PHREEQC-2 (Parkhurst and Appelo 1999) with three-dimensional groundwater flow and transport simulators MODFLOW2000 and MT3DMS (Zheng and Wang 1999). The original version of PHT3D was developed by Henning Prommer and Version 2 by Henning Prommer and Vincent Post (Prommer and Post 2010). More detailed information about PHT3D is available at the website http://www.pht3d.org. The review was conducted separately by two reviewers. This column is presented in two parts.","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"119710332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ISSN Page","authors":"","doi":"10.1111/joca.12161","DOIUrl":"https://doi.org/10.1111/joca.12161","url":null,"abstract":"","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"119812649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NGWA News","authors":"","doi":"10.1111/gwmr.12325","DOIUrl":"https://doi.org/10.1111/gwmr.12325","url":null,"abstract":"","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125800650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Newsline","authors":"","doi":"10.1111/gwmr.12324","DOIUrl":"https://doi.org/10.1111/gwmr.12324","url":null,"abstract":"","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132386956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Featured Products","authors":"Products, Cpe, Schemes, Interviewing, Analytics, Auditing, Controls, Courses, Manuals, Prevention, CFEs","doi":"10.1111/gwmr.12328","DOIUrl":"https://doi.org/10.1111/gwmr.12328","url":null,"abstract":"","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124617861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Fluctuating Groundwater Table on Volatile Organic Chemical Emission Flux at a Dissolved Chlorinated‐Solvent Plume Site","authors":"Yuanming Guo, Chase Holton, Hong Luo, P. Dahlen, Paul C. Johnson","doi":"10.1111/gwmr.12322","DOIUrl":"https://doi.org/10.1111/gwmr.12322","url":null,"abstract":"Groundwater elevation fluctuation has been recognized as one mechanism causing temporal indoor air volatile organic chemical (VOC) impacts in vapor intrusion risk assessment guidance. For dissolved VOC sources, groundwater table fluctuation shortens/lengthens the transport pathway, and delivers dissolved contaminants to soils that are alternating between water saturated and variably saturated conditions, thereby enhancing volatilization potential. To date, this mechanism has not been assessed with field data, but enhanced VOC emission flux has been observed in lab‐scale and modeling studies. This work evaluates the impact of groundwater elevation changes on VOC emission flux from a dissolved VOC plume into a house, supplemented with modeling results for cyclic groundwater elevation changes. Indoor air concentrations, air exchange rates, and depth to groundwater (DTW) were collected at the study house during an 86‐d constant building underpressurization test. These data were used to calculate changes in trichloroethylene (TCE) emission flux to indoor air, during a period when DTW varied daily and seasonally from about 3.1 to 3.4 m below the building foundation (BF). Overall, TCE flux to indoor air varied by about 50% of the average, without any clear correlation to changes in DTW or its change rate. To complement the field study, TCE surface emission fluxes were simulated using a one‐dimensional model (HYDRUS 1D) for conditions similar to the field site. Simulation results showed time‐averaged surface TCE fluxes for cyclic water‐table elevations were greater than for stationary water‐table conditions at an equivalent time‐averaged water‐table position. The magnitudes of temporal TCE emission flux changes were generally less than 50% of the time‐averaged flux, consistent with the field site observations. Simulation results also suggested that TCE emission flux changes due to groundwater fluctuation are likely to be significant at sites with shallow groundwater (e.g., < 0.5 m BF) and permeable soil types (e.g., sand).","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133104450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Newsmakers","authors":"Anonymous","doi":"10.1111/gwmr.12327","DOIUrl":"https://doi.org/10.1111/gwmr.12327","url":null,"abstract":"ANTHONY \"TONY\" SLONIM, MD, DrPH, CPE, FAAPL, president and CEO of Renown Health, a regional hospital network based in Reno, Nevada, and Editor-in-Chief of Physician Leadership Journal, was named as one of Modern Healthcare's 50 Most Influential Clinical Executives of 2021. Renown Health developed the Healthy Nevada Project a few years ago with the purpose of doing comprehensive population health work by offering genetic testing to every Nevadan interested in learning more about their health and genetic profile. Under Slonim's leadership, Renown converted a hospital parking garage into an overflow ward with hundreds of beds for COVID-19 patients.","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117216457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magnetic Resonance Imaging of Nonaqueous Phase Liquid Distribution in Unconsolidated Soils Using Discriminatory Freezing","authors":"Saeed Kiaalhosseini, B. Kohn, A. T. Watson, T. Sale, J. Blotevogel","doi":"10.1111/gwmr.12323","DOIUrl":"https://doi.org/10.1111/gwmr.12323","url":null,"abstract":"Organic contaminants present as nonaqueous phase liquids (NAPLs) in the subsurface often pose a long‐term risk to human health and the environment. Investigating the distribution of NAPLs in porous media remains a major challenge in risk assessment and management of contaminated sites. Conventional soil coring and monitoring wells have been widely used over past decades as the primary means of subsurface investigation to determine NAPL extent. Known limitations of conventional approaches have led us to explore an alternative or a complementary technique to provide high‐quality information of NAPL source zone architecture. This work advances an imaging tool for a variety of organic NAPL contaminants in unconsolidated soils through magnetic resonance imaging (MRI) of frozen cores. Using trichloroethylene (TCE) and o‐xylene as model species, we illustrate that discriminatory freezing of water, while keeping the NAPL in a liquid state, enables high‐resolution qualitative delineation of NAPL distribution within porous media. This novel approach may help improve site conceptual models and consequentially lead to highly tailored, more efficient remedial measures.","PeriodicalId":158105,"journal":{"name":"Groundwater Monitoring & Remediation","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126225972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}