Groundwater最新文献

{"title":"Timing and Source of Recharge to the Columbia River Basalt Groundwater System in Northeastern Oregon","authors":"Henry M. Johnson,&nbsp;Kate Ely,&nbsp;Anna-Turi Maher","doi":"10.1111/gwat.13404","DOIUrl":"10.1111/gwat.13404","url":null,"abstract":"<p>Recharge to and flow within the Columbia River Basalt Group (CRBG) groundwater flow system of northeastern Oregon were characterized using isotopic, gas, and age-tracer samples from wells completed in basalt, springs, and stream base flow. Most groundwater samples were late-Pleistocene to early-Holocene; median age of well samples was 11,100 years. The relation between mean groundwater age and completed well depth across the eastern portion of the study area was similar despite differences in precipitation, topographic position, incision, thickness of the sedimentary overburden, and CRBG geologic unit. However, the lateral continuity in groundwater age was disrupted across large regional fault zones indicating these structures are substantial impediments to groundwater flow from the high-precipitation uplands to adjacent lower-precipitation and lower-elevation portions of the study area. Recharge rates calculated from the age-depth relations were &lt;3 mm/yr and independent of the modern precipitation gradient across the study area. The age-constrained recharge rates to the CRBG groundwater system are considerably smaller than previously published estimates and highlight the uncertainty of prevailing models used to estimate recharge to the CRBG groundwater system across the Columbia Plateau in Oregon and Washington. Age tracer and isotopic evidence indicate recharge to the CRBG groundwater system is an exceedingly slow and localized process.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 5","pages":"761-777"},"PeriodicalIF":2.0,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13404","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140327515","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":"Calling All Groundwater Professionals: Support the National Groundwater Monitoring Network","authors":"David R. Wunsch,&nbsp;Robert P. Schreiber","doi":"10.1111/gwat.13398","DOIUrl":"10.1111/gwat.13398","url":null,"abstract":"&lt;p&gt;The New York Times recently published articles on groundwater in the USA, highlighting chronic over-pumping and other challenges. These articles have elevated groundwater to a front-page issue, garnering interest from the public, state and local regulatory agencies, and policymakers in Washington DC.&lt;/p&gt;&lt;p&gt;One prevalent theme is the lack of groundwater monitoring in many parts of the USA. This shortcoming is not news to groundwater professionals, as it has been identified by hydrogeologists, engineers, and water managers for decades. Led by NGWA, a group of concerned groundwater professionals addressed this national shortcoming starting in 2007 and worked to formally establish a national, integrated groundwater monitoring network. This effort ultimately became the National Groundwater Monitoring Network (NGWMN), a program authorized by Congress within the SECURE Water Act of 2009 and managed by the U.S. Geological Survey since funds were first appropriated in 2015.&lt;/p&gt;&lt;p&gt;The SECURE Water Act is scheduled to sunset later this year, and so it is imperative that groundwater professionals work together to ensure reauthorization of this vital legislation. Why should you get involved and spend your valuable time to help ensure the survival of the NGWMN? Here is brief background information demonstrating the critical need for maintaining and enhancing the NGWMN and why we need your support.&lt;/p&gt;&lt;p&gt;For years, groundwater monitoring in the USA has mostly been a patchwork of state and local water management agency monitoring networks. Some are comprehensive and well-funded, while others are nominal and even rely on public volunteers for data collection. The USGS maintains monitoring wells in various locations across the country, including its nationwide Climate Response Network (CRN), but it mostly focuses on shallow, water table conditions.&lt;/p&gt;&lt;p&gt;To address the lack of a comprehensive nationwide network, professionals and specialists from the private sector, state and federal government agencies, and non-profit organizations have steadily worked through the legislative process to establish and fund the NGWMN through the SECURE Water Act. The NGWMN is now a cooperative program funded along with the CRN at about $4 million annually through the USGS. The NGWMN program provides federal matching funds to data providers—including state, regional, and local agencies—for sharing their monitoring data based on network design and protocols established in the NGWMN framework document. The program also provides funding to data providers for well maintenance, drilling of new wells, and equipment for real-time data collection.&lt;/p&gt;&lt;p&gt;Although the NGWMN is up-and-running, full nationwide coverage is yet to be achieved, and so it is imperative that we groundwater professionals work to ensure its survival and growth.&lt;/p&gt;&lt;p&gt;Here's how you can participate in this effort. First and foremost, indicate your support of a Bill introduced in the House of Representatives (H.R. 57","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 3","pages":"328-329"},"PeriodicalIF":2.6,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13398","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140327514","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":"Evaluation of an Impulse-Response Emulator for Groundwater Contaminant Transport Modeling","authors":"Brent P. Heerspink,&nbsp;Michael N. Fienen,&nbsp;Howard W. Reeves","doi":"10.1111/gwat.13405","DOIUrl":"10.1111/gwat.13405","url":null,"abstract":"<p>There is a significant need to develop decision support tools capable of delivering accurate representations of environmental conditions, such as ground and surface water solute concentrations, in a timely and computationally efficient manner. Such tools can be leveraged to assess a large number of potential management strategies for mitigating non-point source pollutants. Here, we assess the effectiveness of the impulse-response emulation approach to approximate process-based groundwater model estimates of solute transport from MODFLOW and MT3D over a wide range of model inputs and parameters, with the goal of assessing where in parameter space the assumptions underlying this emulation approach are valid. The impulse-response emulator was developed using the sensitivity analysis utilities in the PEST++ software suite and is capable of approximating MODFLOW/MT3D estimates of solute transport over a large portion of the parameter space tested, except in cases where the Courant number is above 0.5. Across all runs tested, the highest percent errors were at the plume fronts. These results suggest that the impulse-response approach may be suitable for emulation of solute transport models for a wide range of cases, except when high-resolution outputs are needed, or when very low concentrations at plume edges are of particular interest.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 6","pages":"945-956"},"PeriodicalIF":2.0,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140308361","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":"Relationship Between Tectonic Lineaments and Springs North of Avanos (Central Anatolia, Turkey)","authors":"Ramazan Demircioğlu","doi":"10.1111/gwat.13400","DOIUrl":"10.1111/gwat.13400","url":null,"abstract":"<p>The study area covers Avanos-Ozkonak and its surroundings north of Nevsehir province. An attempt was made to determine the relationship between tectonic lineaments and springs in the area. It was found that there is a close relationship between the location of springs and tectonic lineaments. In recent years, lineaments have been used in mineral exploration studies and geothermal areas. Remote sensing methods have also been used in this study. The relationship between tectonic lineaments (faults and fractures) and spring formations obtained from field studies and satellite-based studies was evaluated. Metamorphic rocks belonging to the Kirsehir massif and Paleocene–Middle Eocene aged units were subjected to polyphase deformation. As a result of these deformations, faults and cracks were formed. This situation has given aquifer properties to the rocks. At the same time, many springs were formed by faults and cracks. This study determined the relationship between 342 springs identified during field works and tectonic lineaments. Approximately 89% of the springs identified in the field were found to be located on the tectonic lineaments obtained from the satellite imagery. Some springs discharged from discontinuities on the formation boundaries.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 5","pages":"735-747"},"PeriodicalIF":2.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140290045","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":"Preventing Subsidence Reoccurrence in Tianjin: New Preconsolidation Head and Safe Pumping Buffer","authors":"Kuan Wang,&nbsp;Guoquan Wang,&nbsp;Yan Bao,&nbsp;Guangli Su,&nbsp;Yong Wang,&nbsp;Qiang Shen,&nbsp;Yongwei Zhang,&nbsp;Haigang Wang","doi":"10.1111/gwat.13406","DOIUrl":"10.1111/gwat.13406","url":null,"abstract":"<p>Tianjin, a coastal metropolis in north China, has grappled with land subsidence for nearly a century. Yet, emerging evidence suggests a notable decrease in subsidence rates across Tianjin since 2019. This trend is primarily attributed to the importation of surface water from the Yangtze River system via the South-to-North Water Diversion Project, initiated in December 2014. Utilizing Sentinel-1A Interferometric Synthetic Aperture Radar (InSAR) data (2014–2023), this study reveals that one-third of the Tianjin plain has either halted subsidence or experienced land rebound. As a result, the deep aquifer system (~−200 to −450 m) beneath one third of the Tianjin plain has completed a consolidation cycle, leading to the establishment of new, locally specific preconsolidation heads. The identification of the newly established preconsolidation head seeks to answer a crucial question: How can we prevent the reoccurrence of subsidence in areas where it has already ceased? In essence, subsidence will stop when the local hydraulic head elevates to the new preconsolidation head (NPCH), and permanent subsidence will not be reinitiated as long as hydraulic head remains above the NPCH. The difference of the depth between current hydraulic head and the NPCH defines the safe pumping buffer (SPB). This study outlines detailed methods for identifying the NPCHs in the deep aquifer system from long-term InSAR and groundwater-level datasets. Determining NPCHs and ascertaining SPBs are crucial for estimating how much groundwater can be safely extracted without inducing permanent subsidence, and for developing sustainable strategies for long-term groundwater management and conservation.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 5","pages":"778-794"},"PeriodicalIF":2.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140186737","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":"Catchment-Wide Groundwater Budget for the Inkomati-Usuthu Water Management Area in South Africa","authors":"Teboho Shakhane,&nbsp;Moses Mojabake","doi":"10.1111/gwat.13402","DOIUrl":"10.1111/gwat.13402","url":null,"abstract":"<p>In South Africa, approximately 98% of the predicted total surface water resources are already being used up. Consequently, the National Water Resource Strategy considers groundwater to be important for the future planning and management of water resources. In this case, quantifying groundwater budgets is a prerequisite because they provide a means for evaluating the availability and sustainability of a water supply. This study estimated the regional groundwater budgets for the Inkomati-Usuthu Water Management Area (Usuthu, Komati, Sabie-Sand, and Crocodile) using the classical hydrological continuity equation. The equation was used to describe prevailing feedback loops between groundwater draft, recharge, baseflow, and storage change. The results were coarser scale estimates which, beforehand, were derived from the 2006 study. In the years to follow, groundwater reliance intensified and there was also the historic 2015/2016 drought. This inevitably led to an increased draft while the rest of the components of the groundwater budgets experienced decreases. Both Crocodile and Sabie-Sand experienced groundwater storage depletion which led to reduced baseflow and groundwater availability, while groundwater recharge contrarily increased due to capture. Conversely, the other two catchments experienced relatively lower drafts with correspondingly higher groundwater availability and recharge while storage change was positive. The results highlighted the need for adaptive water management whose effectiveness relies on predictive studies. Consequently, future models should be developed to capture the spatial and temporal dynamism of the natural groundwater budget due to climate change, water demands, and population growth predictions.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 3","pages":"480-493"},"PeriodicalIF":2.6,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140178350","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":"Experimental Study of Non-Darcian Flow Characteristics in Low-Permeability Coal Pillar Dams","authors":"Xu Li,&nbsp;Peng Zhu,&nbsp;Konghui Zuo,&nbsp;Zhang Wen,&nbsp;Qi Zhu,&nbsp;Qiang Guo,&nbsp;Hamza Jakada","doi":"10.1111/gwat.13401","DOIUrl":"10.1111/gwat.13401","url":null,"abstract":"<p>The safe operation of underground reservoirs and environmental protection heavily rely on the water flow through coal pillar dams in coal mines. Meanwhile, research on the flow characteristics in coal pillar dams has been limited due to their low hydraulic conductivity. To address this gap, this study assembled a novel seepage experimental device and conducted a series of carefully designed seepage experiments to examine the characteristics of low-permeability in coal pillar dams. The experiments aim to explore the relationship between water flux and hydraulic gradient, considering varying core lengths and immersion times. Flow parameters were determined by fitting observed flux-gradient curves with predictions from both Darcy and non-Darcian laws. Several significant results were obtained. First, a noticeable non-linear relationship between water flux and hydraulic gradient was observed, particularly evident at low flow velocities. Second, the non-Darcy laws effectively interpreted the experimental data, with threshold pressure gradients ranging 13.60 to 58.64 for different core lengths. Third, the study established that water immersion significantly affects the flow characteristics of coal pillar dams, resulting in an increased hydraulic conductivity and flow velocity. These findings carry significant implications for the design of coal pillar dams within underground coal mine reservoirs, providing insights for constructing more stable structures and ensuring environmental protection.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 6","pages":"934-944"},"PeriodicalIF":2.0,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140095413","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":"Implications of the Mississippi v. Tennessee Supreme Court Decision for Interstate Groundwater Management","authors":"Nimisha Wasankar,&nbsp;T. Prabhakar Clement","doi":"10.1111/gwat.13399","DOIUrl":"10.1111/gwat.13399","url":null,"abstract":"<p>Groundwater allocation is rapidly becoming a contentious water resource management problem around the world. It is anticipated that the effects of climate change would further aggravate this problem. Conflicts over the distribution of freshwater are expected to increase as stakeholders want to access more groundwater to meet their growing demands. In the United States, water conflicts are settled through a litigation process. Water litigations can be expensive, protracted, and fraught with complex legal and technical difficulties. A landmark groundwater case involving Tennessee (TN) and Mississippi (MS) was recently litigated in the Supreme Court of the United States (SCOTUS). In this case, MS sued TN for stealing their groundwater and SCOTUS unanimously ruled that the water contained in the aquifer that naturally crosses the border between TN and MS is subject to equitable apportionment. This decision has significant ramifications for groundwater management as it established a precedent for resolving future interstate groundwater litigations. Although the Court has previously applied the legal doctrine of equitable apportionment to settle disputes involving surface water use, this is the first instance in which the doctrine has been applied to resolve an interstate groundwater dispute. Therefore, currently, there are little or no guidelines available for equitably distributing groundwater resources between two states. The objective of this article is to examine this historic legal dispute to fully understand the scientific justification for the judicial stances taken by the plaintiff and defendants, and the legal reasoning for the final verdict. We also discuss the challenges this ruling presents for managing interstate groundwater resources.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"502-512"},"PeriodicalIF":2.0,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13399","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140029814","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":"Passing the Baton","authors":"Christopher J. Neville","doi":"10.1111/gwat.13397","DOIUrl":"10.1111/gwat.13397","url":null,"abstract":"","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 2","pages":"324"},"PeriodicalIF":2.6,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139941397","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":"Regional vs. Local Isotopic Gradient: Insights and Modeling from Mid-Mountain Areas in Central Italy","authors":"Alberto Tazioli,&nbsp;Davide Fronzi,&nbsp;Stefano Palpacelli","doi":"10.1111/gwat.13395","DOIUrl":"10.1111/gwat.13395","url":null,"abstract":"<p>Mountainous zones are often characterized by complex orography and contacts between different aquifers that usually complicate the use of isotope hydrology techniques. The Apennine chain (Italy) and 10 mountain and mid-mountain areas belonging to it are the objective of this study. An original isotopic data treatment, able to identify the most probable recharge area for several springs/springs' groups/wells, has been developed. The method consists of a two-step approach: (1) the determination of the spring/wells computed isotope recharge elevation; (2) an advanced δ¹⁸O precipitation distribution model over the study area supported by statistical and GIS-based procedures implemented by two processes: first, the clipping of precipitation δ¹⁸O values (depicted from the δ¹⁸O–elevation relationships obtained for each study area) over a most probable recharge area for each analyzed spring or well and, second, the calculation of the overlapping distribution between the spring/well mean δ¹⁸O values ± σ and the precipitation δ¹⁸O content for each outcropping aquifer. A new regional δ¹⁸O gradient covering 150 km latitudinal length of central Italy has been defined. Seven LMWL and δ¹⁸O–elevation relationships able to represent the local precipitation isotopic composition have been obtained. The mean elevation of the springs and wells recharge areas have been assessed by a comparison between the obtained gradient with nine δ¹⁸O gradients available in the literature and those obtained at a local scale. The new isotopic modeling approach can stress whether the mere isotope modeling based on the stable isotope of oxygen agrees with the hydrogeological setting of the study areas.</p>","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 5","pages":"714-734"},"PeriodicalIF":2.0,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139742981","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}