Groundwater最新文献_第8页

Groundwater for People and the Environment: A Globally Threatened Resource 地下水对人类和环境的影响:一种受到全球威胁的资源。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-11-21 DOI: 10.1111/gwat.13376

Hugo A. Loaiciga, Ryan Doh

{"title":"Groundwater for People and the Environment: A Globally Threatened Resource","authors":"Hugo A. Loaiciga, Ryan Doh","doi":"10.1111/gwat.13376","DOIUrl":"10.1111/gwat.13376","url":null,"abstract":"The intensity of global groundwater use rose from 124 m3 per capita in 1950 to 152 m3 in 2021, for a 22.6% rise in the annual per capita use. This rise in global per capita water use reflects rising consumption patterns. The global use of groundwater, which provides between 21% and 30% of the total freshwater annual consumption, will continue to expand due to the sustained population growth projected through most of the 21st century and the important role that groundwater plays in the water-food-energy nexus. The rise in groundwater use, on the other hand, has inflicted adverse impacts in many aquifers, such as land subsidence, sea water intrusion, stream depletion, and deterioration of groundwater-dependent ecosystems, groundwater-quality degradation, and aridification. This paper projects global groundwater use between 2025 and 2050. The projected global annual groundwater withdrawal in 2050 is 1535 km3 (1 km3 = 109 m3 = 810,713 acre-feet). The projected global groundwater depletion, that is, the excess of withdrawal over recharge, in 2050 equals 887 km3, which is about 61% larger than in 2021. This projection signals probable exacerbation of adverse groundwater-withdrawal impacts, which are worsened by climatic trends and the environmental requirement of groundwater flow unless concerted national and international efforts achieve groundwater sustainability.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 3","pages":"332-340"},"PeriodicalIF":2.6,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13376","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138292631","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}

引用次数: 0

Impact of Type and Shape of Microplastics on the Transport in Column Experiments 微塑料种类和形状对塔中输运的影响

IF 2 4区地球科学

Groundwater Pub Date : 2023-11-20 DOI: 10.1111/gwat.13375

Cheyanne A. Schenkel, Megan R.M. Brown, Melissa E. Lenczewski

{"title":"Impact of Type and Shape of Microplastics on the Transport in Column Experiments","authors":"Cheyanne A. Schenkel, Megan R.M. Brown, Melissa E. Lenczewski","doi":"10.1111/gwat.13375","DOIUrl":"10.1111/gwat.13375","url":null,"abstract":"The pervasive nature of plastic and the longevity of plastics leaves a legacy of microplastics (MPs) that contaminate our environment, including drinking water sources. Although MPs have been documented in every environmental setting, a paucity of research has focused on the transport and fate of MPs in groundwater. Previous field and laboratory studies have shown that MPs can migrate through aquifer material and are influenced by environmental factors. This study used controlled column experiments to investigate the influence of polymer type (polyamide, polyethylene, polypropylene, and polyester) and particle shape (fragment, fiber, and sphere) on MP retardation and retention. The results showed that all individual MP types investigated were retarded compared to the NaCl tracer, with a retardation factor ranging from 1.53 to 1.75. While hypothesized that presence of multiple types and shapes could change mobility, the results indicate that this hypothesis is not correct for the conditions tested. This study provides new insights into MP transport in groundwater systems based on the characteristics of MP particles. In addition, this study demonstrates the need for further research on types of MPs and under more conditions, especially in the presence of a mixture of types and shapes of MPs to gauge what is occurring in natural systems where many MPs are present together.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"537-547"},"PeriodicalIF":2.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138178329","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}

引用次数: 0

Towards Improved Remedial Outcomes in Categorical Aquifers with an Iterative Ensemble Smoother 使用迭代集成平滑器改进分类含水层的修复效果。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-11-09 DOI: 10.1111/gwat.13369

Prashanth Khambhammettu, Philippe Renard, John Doherty, Jeremy White, Marc Killingstad, Michael Kladias

{"title":"Towards Improved Remedial Outcomes in Categorical Aquifers with an Iterative Ensemble Smoother","authors":"Prashanth Khambhammettu, Philippe Renard, John Doherty, Jeremy White, Marc Killingstad, Michael Kladias","doi":"10.1111/gwat.13369","DOIUrl":"10.1111/gwat.13369","url":null,"abstract":"Categorical parameter distributions consisting of geologic facies with distinct properties, for example, high-permeability channels embedded in a low-permeability matrix, are common at contaminated sites. At these sites, low-permeability facies store solute mass, acting as secondary sources to higher-permeability facies, sustaining concentrations for decades while increasing risk and cleanup costs. Parameter estimation is difficult in such systems because the discontinuities in the parameter space hinder the inverse problem. This paper presents a novel approach based on Traveling Pilot Points (TRIPS) and an iterative ensemble smoother (IES) to solve the categorical inverse problem. Groundwater flow and solute transport in a hypothetical aquifer with a categorical parameter distribution are simulated using MODFLOW 6. Heads and concentrations are recorded at multiple monitoring locations. IES is used to generate posterior ensembles assuming a TRIPS prior and an approximate multi-Gaussian prior. The ensembles are used to predict solute concentrations and mass into the future. The evaluation also includes an assessment of how the number of measurements and the choice of the geological prior determine the characteristics of the posterior ensemble and the resulting predictions. The results indicate that IES was able to efficiently sample the posterior distribution and showed that even with an approximate geological prior, a high degree of parameterization and history matching could lead to parameter ensembles that can be useful for making certain types of predictions (heads, concentrations). However, the approximate geological prior was insufficient for predicting mass. The analysis demonstrates how decision-makers can quantify uncertainty and make informed decisions with an ensemble-based approach.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 1","pages":"60-74"},"PeriodicalIF":2.6,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72016500","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}

引用次数: 0

Delineation of a PFOA Plume and Assessment of Data Gaps in its Conceptual Model Using PlumeSeeker™ 使用PlumeSeekerTM绘制全氟辛烷磺酸羽流并评估其概念模型中的数据差距。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-11-06 DOI: 10.1111/gwat.13373

Metin Ozbek, Nathan Voorhies, Lucas Howard, Ryan Swanson, Tad Fox

{"title":"Delineation of a PFOA Plume and Assessment of Data Gaps in its Conceptual Model Using PlumeSeeker™","authors":"Metin Ozbek, Nathan Voorhies, Lucas Howard, Ryan Swanson, Tad Fox","doi":"10.1111/gwat.13373","DOIUrl":"10.1111/gwat.13373","url":null,"abstract":"An accurate conceptual site model (CSM) and plume-delineation at contamination sites are pre-requisites for successful remediation and for satisfying regulators and stakeholders. PlumeSeeker™ is well-suited for assessing data gaps in CSMs by using available site data and for identifying the optimal number and locations of sampling locations to delineate contaminant plumes. It is an enhancement of a university research code for plume delineation using geostatistical and stochastic modeling integrated with the groundwater modeling software MODFLOW-SURFACT™. PlumeSeeker™ increases the overall confidence in the location of the plume boundary through a variance-reduction approach that selects existing- or new monitoring wells for sampling based on minimizing the uncertainty in plume boundary and on new field information. Applicable at sites with or without existing monitoring wells, PlumeSeeker™ is particularly powerful for optimally allocating project resources (labor, well installation, and laboratory costs) between existing wells and sampling at new locations. An application of PlumeSeeker™ at Lakehurst, the naval component of Joint Base McGuire-Dix-Lakehurst in New Jersey, demonstrates how the cost of delineating the migration pathway of a perfluorooctanoic acid (PFOA) plume can be minimized by requiring only 9 new sampling locations in addition to samples from 2 existing wells for achieving a 70% reduction in plume uncertainty. In addition, the use of available site data in three different scenarios identified CSM data-gaps in the source area and in the interaction between Manapaqua Branch and groundwater, where the observed high concentration in this area could have resulted from a combination of groundwater migration and induced infiltration.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 1","pages":"44-59"},"PeriodicalIF":2.6,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71490378","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}

引用次数: 0

Borehole Nuclear Magnetic Resonance Estimation of Specific Yield in a Fractured Granite Aquifer 裂隙花岗岩含水层中特定产量的钻孔核磁共振估算。

IF 2 4区地球科学

Groundwater Pub Date : 2023-11-06 DOI: 10.1111/gwat.13374

Stephanie N. Phillips, Bradley Carr, Ye Zhang, Brady Flinchum, Shuangpo Ren

{"title":"Borehole Nuclear Magnetic Resonance Estimation of Specific Yield in a Fractured Granite Aquifer","authors":"Stephanie N. Phillips, Bradley Carr, Ye Zhang, Brady Flinchum, Shuangpo Ren","doi":"10.1111/gwat.13374","DOIUrl":"10.1111/gwat.13374","url":null,"abstract":"In this study, we introduce a novel field-based method to estimate specific yield (Sy) in fractured, low-porosity granite aquifers using borehole nuclear magnetic resonance (bNMR). This method requires collecting a bNMR survey immediately following a pump test, which dewaters the near-borehole fractures. The residual water content measured from bNMR is interpreted as “bound” and represents the specific retention (Sr) while the water drained by the pump is the Sy. The transverse relaxation cutoff time (T2C) is the length of time that partitions the total porosity measured by bNMR into Sr and Sy. When applying a calibrated T2C, Sy equals the bNMR total porosity minus Sr; thus, a calibrated T2C is required to determine Sy directly from NMR results. Based on laboratory experiments on sandstone cores, the default T2C is 33 ms; however, its applicability to fractured granite aquifers is uncertain. The optimal T2C based on our pumping test is 110 ± 25 ms. Applying this calibrated T2C on a saturated, A-type granite at our field site, we estimate the Sy to be 0.012 ± 0.005 m3 m−3 which is significantly different from the Sy (0.021 ± 0.005 m3 m−3) estimate using the default T2C of 33 ms. This Sy estimate falls within a range determined using traditional hydraulic testing at the same site. Using the conventional T2C (33 ms) for fractured granite leads to an inaccurate Sy; therefore, it is essential to calibrate the bNMR T2C for the local site conditions prior to estimating Sy.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"578-590"},"PeriodicalIF":2.0,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71490377","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}

引用次数: 0

Hydrogeochemical Evaluation of Aquifer Storage and Recovery in Edwards Aquifer, New Braunfels, Texas 德克萨斯州新布朗费尔斯Edwards含水层蓄水和恢复的水文地球化学评价。

IF 2 4区地球科学

Groundwater Pub Date : 2023-11-05 DOI: 10.1111/gwat.13372

Christophe Wakamya Simbo

{"title":"Hydrogeochemical Evaluation of Aquifer Storage and Recovery in Edwards Aquifer, New Braunfels, Texas","authors":"Christophe Wakamya Simbo","doi":"10.1111/gwat.13372","DOIUrl":"10.1111/gwat.13372","url":null,"abstract":"This study examines the potential for aquifer storage and recovery (ASR) in the brackish portion of the Edwards aquifer in New Braunfels, Texas. Successful ASR relies on understanding hydraulic properties, aquifer heterogeneity, water geochemistry, and geochemical processes during operations. The research aims to investigate the chemistries of native groundwater and injectant during ASR operation, estimate the hydraulic properties of the aquifer layers, and assess the recovery rate for the recovered groundwater meeting the total dissolved solids (TDS) threshold. The study found that native groundwater is of Na-Cl facies due to halite dissolution and a possible basinal brine migration associated with the zone of greatest fault displacement. High sulfate ions in background native groundwater result from sulfate-bearing minerals' dissolution in the Kainer and Person Formations. The injectant water is of Ca-Mg-HCO3 facies due to the carbonate-rich composition of the aquifer host matrix and interaction with the Guadalupe River riverbed. During ASR operations, mixing controlled the shift in hydrochemical facies from Na-Cl to Ca-Mg-HCO3.The study also suggests a possible connection between Kainer and Person Formations and preferential pathways in the targeted storage zone aquifer. The estimated conductivity values also indicate dominant horizontal flow via possible fracture pathways in both the Person and Kainer Formation storage zones. Recovery of groundwater meeting the TDS of 1000 mg/L requires a recovery rate of 0.03 m3/s for 60 days after 40-day storage. This research emphasizes that understanding the hydrogeological conditions and geochemical processes is critical to ASR feasibility in brackish carbonate multi-aquifer fractured systems.","PeriodicalId":12866,"journal":{"name":"Groundwater","volume":"62 4","pages":"560-577"},"PeriodicalIF":2.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gwat.13372","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71490379","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}

引用次数: 0

A History of India's Groundwater Crisis 印度地下水危机史

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-11-02 DOI: 10.1111/gwat.13371

Vivek Singh Grewal

引用次数: 0

Effects of Auto-Adaptive Localization on a Model Calibration Using Ensemble Methods 自适应定位对使用集成方法的模型校准的影响。

IF 2.6 4区地球科学

Groundwater Pub Date : 2023-10-28 DOI: 10.1111/gwat.13368

Jonathan P. Traylor, Randall J. Hunt, Jeremy White, Michael N. Fienen

引用次数: 0

An Agricultural Package for MODFLOW 6 Using the Application Programming Interface 使用应用程序接口的MODFLOW 6农业软件包。