Groundwater最新文献

{"title":"Conceptualizing Controlling Factors for PFAS Salting Out in Groundwater Discharge Zones Along Sandy Beaches","authors":"Hiroko M. Hort,&nbsp;Clare E. Robinson,&nbsp;Audrey H. Sawyer,&nbsp;Yue Li,&nbsp;Rebecca Cardoso,&nbsp;Sophia A. Lee,&nbsp;Douglas Roff,&nbsp;David T. Adamson,&nbsp;Charles J. Newell","doi":"10.1111/gwat.13428","DOIUrl":"10.1111/gwat.13428","url":null,"abstract":"<p>Understanding fate and transport processes for per- and poly-fluoroalkyl substances (PFAS) is critical for managing impacted sites. “PFAS Salting Out” in groundwater, defined herein, is an understudied process where PFAS in fresh groundwater mixes with saline groundwater near marine shorelines, which increases sorption of PFAS to aquifer solids. While sorption reduces PFAS mass discharge to marine surface water, the fraction that sorbs to beach sediments may be mobilized under future salinity changes. The objective of this study was to conceptually explore the potential for PFAS Salting Out in sandy beach environments and to perform a preliminary broad-scale characterization of sandy shoreline areas in the continental U.S. While no site-specific PFAS data were collected, our conceptual approach involved developing a multivariate regression model that assessed how tidal amplitude and freshwater submarine groundwater discharge affect the mixing of fresh and saline groundwater in sandy coastal aquifers. We then applied this model to 143 U.S. shoreline areas with sandy beaches (21% of total beaches in the USA), indirectly mapping potential salinity increases in shallow freshwater PFAS plumes as low (&lt;10 ppt), medium (10–20 ppt), or high (&gt;20 ppt) along groundwater flow paths before reaching the ocean. Higher potential salinity increases were observed in West Coast bays and the North Atlantic coastline, due to the combination of moderate to large tides and large fresh groundwater discharge rates, while lower increases occurred along the Gulf of Mexico and the southern Florida Atlantic coast. The salinity increases were used to estimate potential perfluorooctane sulfonic acid (PFOS) sorption in groundwater due to salting out processes. Low-category shorelines may see a 1- to 2.5-fold increase in sorption of PFOS, medium-category a 2.0- to 6.4-fold increase, and high-category a 3.8- to 25-fold increase in PFOS sorption. The analysis presented provides a first critical step in developing a large-scale approach to classify the PFAS Salting Out potential along shorelines and the limitations of the approach adopted highlights important areas for further research.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 6","pages":"860-875"},"PeriodicalIF":2.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141473857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Imputation Method for Simulating 3D Well Screen Locations from Limited Regional Well Log Data","authors":"Georgios Kourakos,&nbsp;Rich Pauloo,&nbsp;Thomas Harter","doi":"10.1111/gwat.13424","DOIUrl":"10.1111/gwat.13424","url":null,"abstract":"<p>In groundwater modeling studies, accurate spatial and intensity identification of water sources and sinks is of critical importance. Precise construction data about wells (water sinks) are particularly difficult to obtain. The collection of well log data is expensive and laborious, and government records of historic well log data are often imprecise and incomplete with respect to the precise location or pumping rate. In many groundwater modeling studies, such as groundwater quality assessments, a precise representation of the horizontal and vertical distribution of well screens is required to accurately estimate contaminant breakthrough curves. The number of wells under consideration may be very large, for example, in the assessment of nonpoint source pollution. In this paper, we propose an imputation framework that allows for proper reconstruction of missing well data. Our approach exploits available information and tolerates data gaps and imprecisions. We demonstrate the value of this method for a subregion of the Central Valley aquifer (California, USA). We show that our framework imputes missing values that preserve statistical properties of available data and that remain consistent with the known spatial distribution of well screens and pumping rates in the three-dimensional aquifer system.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 6","pages":"920-933"},"PeriodicalIF":2.0,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13424","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141461357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Society News","authors":"Mike Price","doi":"10.1111/gwat.13430","DOIUrl":"https://doi.org/10.1111/gwat.13430","url":null,"abstract":"","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"500"},"PeriodicalIF":2.0,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141556715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ghislain de Marsily: An Appreciation","authors":"Craig T. Simmons","doi":"10.1111/gwat.13420","DOIUrl":"10.1111/gwat.13420","url":null,"abstract":"&lt;p&gt;Professor Ghislain de Marsily was born on October 18, 1939 in Mas d'Auge, Provence and died in Paris, France on April 21, 2024. de Marsily was an internationally renowned groundwater scholar. His teaching and research were characterized by the application of geology, engineering, mathematics, and curiosity to understanding the movement of groundwater. de Marsily made seminal contributions to the field of stochastic hydrogeology and was famed for his work as a prominent and persuasive advocate for holistic, equitable, and science-driven water management.&lt;/p&gt;&lt;p&gt;de Marsily graduated in 1963 as a civil mining engineer from the Ecole des Mines, Paris. A period with a public works company followed, as did an additional qualification as a geological engineer (1967). He joined academia to pursue what would be a life-long relationship with research. His first internationally significant paper, “An automatic solution for the inverse problem,” was published in &lt;i&gt;Water Resources Research&lt;/i&gt; in 1971 (Emsellem and de Marsily &lt;span&gt;1971&lt;/span&gt;). Professional recognition and leadership roles followed quickly. In 1973, he was appointed to the role of Director of the Centre d'Informatique Géologique at the Ecole des Mines, and during his tenure in this position completed his PhD at the Université de Pierre and Marie Curie (also known as Paris VI) in 1978.&lt;/p&gt;&lt;p&gt;In 1985, de Marsily was appointed to the position of Professor of Geology at Paris VI. This heralded a new era of appointments to a variety of governance and management positions that combined his love of research with his skills as a broad thinker and communicator. These appointments included directorship of the Applied Geology Laboratory (1987-2004), foundation director of UMR CNRS SISYPHE (1989-2000) and director of the Geosciences and Natural Resources Doctoral School (2000-2004).&lt;/p&gt;&lt;p&gt;&lt;/p&gt;&lt;p&gt;Professor de Marsily's teaching and research spanned hydrogeology, watershed management, sedimentary basin modeling, fractured rock hydrology, transport of heat and contaminants in porous/fractured media, and waste disposal. His works on inverse methods and stochastic hydrogeology were pioneering and have gone on to shape the discipline of environmental modeling well beyond a tool restricted to hydrogeology. His work continues to reverberate today. His 1980 paper with Georges Matheron “Is transport in porous media always diffusive? A counterexample” remains one of the most highly cited papers in hydrogeology (Matheron and de Marsily &lt;span&gt;1980&lt;/span&gt;). The field of geostatistics was greatly enriched by de Marsily's conceptual innovation and mathematical precision.&lt;/p&gt;&lt;p&gt;de Marsily was a pioneer of the now widely applied pilot point method for computer-assisted calibration of groundwater models. Without attempting to be comprehensive, readers are directed to the landmark papers of Certes and de Marsily (&lt;span&gt;1991&lt;/span&gt;), RamaRao et al. (&lt;span&gt;1995&lt;/span&gt;), and Lavenue and de Marsily (&lt;span&gt;2001&lt;/span&gt;). Some","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"656-658"},"PeriodicalIF":2.0,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13420","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141461393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sampling in Long-Screened Wells: Issues, Misconceptions, and Solutions","authors":"Frederick D. Day-Lewis,&nbsp;Rob D. Mackley,&nbsp;Rebecka Bence","doi":"10.1111/gwat.13427","DOIUrl":"10.1111/gwat.13427","url":null,"abstract":"<p>The issues associated with long-screened wells (LSWs) (and open boreholes) at contaminated sites are well documented in the groundwater literature but are still not fully appreciated in practice. As established in seminal and review papers going back over three decades, the interpretation of sampling results from LSWs is challenging in the presence of vertical hydraulic gradients and borehole flow; furthermore, LSWs allow for vertical redistribution of contamination between aquifer layers. Acknowledgment of these issues has led to the development of new technologies and well designs to enable discrete-zone monitoring (DZM), yet LSWs remain common for many reasons, for example, as multipurpose wells, for geophysical logging, and (or) as legacy installations. Despite the literature on LSWs and despite the adoption of DZM at many sites, the use of LSWs persists and the challenges of interpreting sampling results from LSWs remain. In this issue paper, we provide a conceptual overview of the problems posed by LSWs and review existing literature and past work to improve the interpretation of sampling in LSWs. We draw on experience from previous studies at the Hanford Site in eastern WA, USA, and use synthetic examples to illustrate key concepts and challenges for interpretation. A recently published analytical modeling framework is used to develop illustrative synthetic examples and demonstrate a workflow for building scientific intuition to understand issues around interpreting samples from LSWs, which is critical to effective characterization and groundwater remediation at sites with LSWs.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 5","pages":"669-680"},"PeriodicalIF":2.0,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13427","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142116458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal Groundwater Level Dynamics in Unconfined Aquifers across the United States","authors":"Mason O. Stahl,&nbsp;Tyler Mar,&nbsp;Yusuf Jameel","doi":"10.1111/gwat.13422","DOIUrl":"10.1111/gwat.13422","url":null,"abstract":"<p>Groundwater hydrographs contain a rich set of information on the dynamics of aquifer systems and the processes and properties that influence them. While the importance of seasonal cycles in hydrologic and environmental state variables is widely recognized there has yet to be a comprehensive analysis of the seasonal dynamics of groundwater across the United States. Here we use time series of groundwater level measurements from 997 wells from the National Groundwater Monitoring Network to identify and describe groundwater seasonal cycles in unconfined aquifers across the United States. We use functional data analysis to obtain a functional form fit for each site and apply an unsupervised clustering algorithm to identify a set of five distinct seasonal cycles regimes. Each seasonal cycle regime has a distinctive shape and distinct timing of its annual minimum and maximum water level. There are clear spatial patterns in the occurrence of each seasonal cycle regime, with the relative occurrence of each regime strongly influenced by the geologic setting (aquifer system), climate, and topography. Our findings provide a comprehensive characterization of groundwater seasonal cycles across much of the United States and present both a methodology and results useful for assessing and understanding unconfined groundwater systems.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 6","pages":"876-888"},"PeriodicalIF":2.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141297614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Observations of a New Editor-in-Chief","authors":"Kenneth R. Bradbury","doi":"10.1111/gwat.13423","DOIUrl":"10.1111/gwat.13423","url":null,"abstract":"&lt;p&gt;In January of this year, I became the 10th Editor-in-Chief of &lt;i&gt;Groundwater&lt;/i&gt; since its inception in 1963. I owe many thanks to my predecessor, Lenny Konikow, for his 4 years of service and contributions to the journal, and for his generous time in training me for this new challenge. I also gratefully acknowledge all the former Editors (William Walton, Jay Lehr, John Bredehoeft, Warren Wood, Mary Anderson, Frank Schwartz, and Henk Haitjema) for building &lt;i&gt;Groundwater&lt;/i&gt; into an internationally recognized journal and for setting and maintaining a high bar for quality content. I am humbled and honored to follow in their footsteps and will aim to maintain the journal's reputation for excellence.&lt;/p&gt;&lt;p&gt;I have spent most of my career as a practicing hydrogeologist at a state geological survey, with a background in applied research, teaching, and outreach. This work has given me broad exposure to most aspects of groundwater science, but there are few areas in which I can claim real expertise. For that I rely on the recommendations and advice of the dedicated executive editors and associate editors of our Editorial Board, and of course of the hundreds of individuals who support the journal by providing peer reviews.&lt;/p&gt;&lt;p&gt;Now that I have been editing &lt;i&gt;Groundwater&lt;/i&gt; for several months I have several observations:&lt;/p&gt;&lt;p&gt;&lt;i&gt;Groundwater&lt;/i&gt; is a very effective venue for publishing your work. During calendar year 2023 the journal (volume 61) published 100 papers. Papers originated from 39 different countries, and the journal had a 49% acceptance rate for submitted articles. Based on metrics provided by our publisher, Wiley, articles in &lt;i&gt;Groundwater&lt;/i&gt; are highly valued and highly read, with almost 240,000 full-text views during 2023. About 30% of these views were accessed by users in the United States, followed by China, Canada, Australia, Germany, and other countries around the world.&lt;/p&gt;&lt;p&gt;As most readers know, in January of 2024 &lt;i&gt;Groundwater&lt;/i&gt; became a completely digital publication; the publisher is longer printing or mailing hard copies. Instead, all articles are available through the web in the Wiley online library, and &lt;i&gt;Groundwater&lt;/i&gt;'s Early View feature makes articles available within a few weeks after final acceptance and before being compiled into final issues. An exciting new feature added in 2024 is the ability to include embedded rich media (audio and video files) as part of a paper. However, a downside to digital publication in general has been the rapid growth of new alternative journals outside of the long-established scientific publishers. Expanding the number of journals dilutes the author and reviewer pools and can make it more difficult to obtain peer reviews.&lt;/p&gt;&lt;p&gt;In this era when some question the validity of scientific research, independent peer review of submitted manuscripts is more important than ever. Unfortunately, the challenges of obtaining these reviews, as previously addressed by Konikow (&lt;span&gt;2023&lt;/sp","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"498-499"},"PeriodicalIF":2.0,"publicationDate":"2024-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13423","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141289048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Hydraulic Evolution of Groundwater-Fed Pit Lakes After Mine Closure","authors":"Birte Moser,&nbsp;Peter G. Cook,&nbsp;Anthony D. Miller,&nbsp;Shawan Dogramaci,&nbsp;Ilka Wallis","doi":"10.1111/gwat.13419","DOIUrl":"10.1111/gwat.13419","url":null,"abstract":"<p>Open pit mining frequently requires regional water tables to be lowered to access ore deposits. When mines close, dewatering ceases allowing the water table to recover. In arid and semi-arid mining regions, the developing pit lakes are predominantly fed by groundwater during this recovery phase and pit lakes develop first into “terminal sinks” for the surrounding groundwater system. With time, the re-establishment of regional hydraulic gradients can cause pit lakes to develop into throughflow systems, in which pit lake water outflows into adjacent aquifers. In this study, we use numerical groundwater modeling to aid process understanding of how regional hydraulic gradients, aquifer properties, net evaporation rates, and pit geometry determine the hydraulic evolution of groundwater-fed pit lakes. We find that before the recovery of the regional water table to its new equilibrium, pit lakes frequently transition to throughflow systems. Throughflow from pit lakes to downstream aquifers can develop within two decades following cessation of dewatering even under low hydraulic gradients (e.g., 5 × 10⁻⁴) or high net evaporation rates (e.g., 2.5 m/year). Pit lakes remain terminal sinks only under suitable combinations of high evaporation rates, low hydraulic gradients, and low hydraulic conductivities. In addition, we develop an approximate analytical solution for a rapid assessment of the hydraulic status of pit lakes under steady-state conditions. Understanding whether pit lakes remain terminal sinks or transition into throughflow systems largely determines the long-term water quality of pit lakes and downstream aquifers. This knowledge is fundamental for mine closure and planning post-mining land use.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 6","pages":"889-903"},"PeriodicalIF":2.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13419","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141201578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Case Study for Determination of the Best Underground Dam Sites, Bursa Province, Turkey","authors":"Egemen Aras,&nbsp;Burak Boz,&nbsp;Babak Vaheddoost,&nbsp;Damla Yılmaz","doi":"10.1111/gwat.13421","DOIUrl":"10.1111/gwat.13421","url":null,"abstract":"<p>Water constitutes an indispensable resource vital for sustaining life. In this context, groundwater stands out as a paramount global water source. Throughout history, underground dams (UGDs) have been employed to augment the storage capacity of local aquifers. This study employs a multistep elimination approach to identify optimal locations for constructing UGDs in the Bursa district, Turkey. Initially, the Digital Elevation Model (DEM) is utilized to pinpoint the potential construction sites at the watershed scale. Criteria such as suitable topographic slope range, proximity to the transport infrastructures, presence of natural or artificial reservoirs, distance to active or inactive faults, proximity to the urban and rural settlements, location of the irrigation zones, geological conditions, distance to the consumption hubs, thickness of alluvium layer, and the groundwater depth are used to establish the buffer zones for exclusion of potential sites. Then, storage volume in the proposed sites is determined, and formal requests from the local communities are taken into consideration for determining the best UGD sites. The study concludes that five UGDs for irrigation and one for drinking water purposes could be recommended for further implementation.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 5","pages":"804-816"},"PeriodicalIF":2.0,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141181655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Society News","authors":"Mike Price","doi":"10.1111/gwat.13410","DOIUrl":"https://doi.org/10.1111/gwat.13410","url":null,"abstract":"","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 3","pages":"330"},"PeriodicalIF":2.6,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140814274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}