Ground water最新文献

ARCHI: A New R Package for Automated Imputation of Regionally Correlated Hydrologic Records. ARCHI：用于区域相关水文记录自动估算的新 R 软件包。

Ground water Pub Date : 2025-02-28 DOI: 10.1111/gwat.13474

Zeno F Levy, Robin L Glas, Timothy J Stagnitta, Neil Terry

{"title":"ARCHI: A New R Package for Automated Imputation of Regionally Correlated Hydrologic Records.","authors":"Zeno F Levy, Robin L Glas, Timothy J Stagnitta, Neil Terry","doi":"10.1111/gwat.13474","DOIUrl":"https://doi.org/10.1111/gwat.13474","url":null,"abstract":"Missing data in hydrological records can limit resource assessment, process understanding, and predictive modeling. Here, we present ARCHI (Automated Regional Correlation Analysis for Hydrologic Record Imputation), a new, open-source software package in R designed to aggregate, impute, cluster, and visualize regionally correlated hydrologic records. ARCHI imputes missing data in \"target\" records by linear regression using more complete \"reference\" records as predictors. Automated imputation is implemented using a novel, iterative algorithm that allows each site to be considered a target or reference for regression, growing the pool of complete references with each imputed record until viable gap-filling ceases. Users can limit artifacts from spurious correlations by specifying model-acceptance criteria and applying geospatial, correlation, and group-based filters to control reference selection. ARCHI provides additional functions for visualizing results, clustering records with similar correlation structures, evaluating holdout data, and interactive parameterization with an accessible and intuitive graphical user interface (GUI). This methods brief provides an overview of the ARCHI package, modeling guidelines, and benchmarking on two regional groundwater-level datasets from the Central Valley, CA and Long Island, NY. We evaluate ARCHI alongside widely used multivariate imputation software to highlight and contextualize its computational efficiency, imputation accuracy, and model transparency when applied to large, groundwater-level datasets.","PeriodicalId":94022,"journal":{"name":"Ground water","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143525587","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}

引用次数: 0

A New Groundwater Energy Transport Model for the MODFLOW Hydrologic Simulator.

Ground water Pub Date : 2025-02-14 DOI: 10.1111/gwat.13470

Eric D Morway, Alden M Provost, Christian D Langevin, Joseph D Hughes, Martijn J Russcher, Chieh-Ying Chen, Yu-Feng F Lin

{"title":"A New Groundwater Energy Transport Model for the MODFLOW Hydrologic Simulator.","authors":"Eric D Morway, Alden M Provost, Christian D Langevin, Joseph D Hughes, Martijn J Russcher, Chieh-Ying Chen, Yu-Feng F Lin","doi":"10.1111/gwat.13470","DOIUrl":"https://doi.org/10.1111/gwat.13470","url":null,"abstract":"Heat transport in the subsurface is an important aspect of research related to the effects of a warming climate on ecological services (i.e., cold-water refugia); the development of geothermal resources for energy banking schemes (i.e., aquifer thermal energy storage [ATES]); and the effects of temperature on other aspects of groundwater quality, such as nutrient cycling. Historically, simulation of heat transport using the MODFLOW groundwater simulator and related codes was performed by scaling the input parameters of a solute-transport model to emulate heat transport. However, that approach required additional pre- and post-processing of input and output and could not account for the variation in effective thermal storage and transport properties during transient, unsaturated flow, for example. True heat-transport capabilities in the context of MODFLOW were first introduced in a variant called USG-Transport. More recently, a new groundwater energy-transport (GWE) model type has been added to MODFLOW 6, the core version of the MODFLOW hydrologic simulator. GWE supports the simulation of heat transport on structured or unstructured grids as well as within and between features of advanced packages that represent streams, lakes, multi-aquifer wells, and the unsaturated zone. GWE is integrated within MODFLOW 6 and is accessible through the FloPy Python package and the MODFLOW 6 application programming interface (API). An example simulation demonstrates conduction between grid cells through both the water and the solid aquifer material, including thermal bleeding from saturated overburden cells into a groundwater flow field.","PeriodicalId":94022,"journal":{"name":"Ground water","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143426847","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}

引用次数: 0

Sustainable Irrigation: A Shift From Conventional to Solar Tube-Wells.

Ground water Pub Date : 2025-02-11 DOI: 10.1111/gwat.13469

Asim Khan, Israr Ahmed, Syed Mohammad Khair

{"title":"Sustainable Irrigation: A Shift From Conventional to Solar Tube-Wells.","authors":"Asim Khan, Israr Ahmed, Syed Mohammad Khair","doi":"10.1111/gwat.13469","DOIUrl":"https://doi.org/10.1111/gwat.13469","url":null,"abstract":"This study examines the factors influencing the adoption of solar tube well technology for groundwater extraction in the agriculture sector, focusing on the Balochistan region of Pakistan. Water scarcity is a major challenge in this region due to declining groundwater level and unreliable power supplies. The study uses a binary logit regression model to analyze the factors that determine the adoption of solar tube wells by farmers. The study took into account variables such as age, education level of household head and access to credit, farmers' perception of groundwater depletion, number of hours of tube well operation, and cost of adopting solar technology. The results indicate that education level and experience positively influence farmers' ability to use solar tube wells. Education provides farmers with the knowledge to understand modern farming methods and the benefits of solar technology. In addition, the cost-effectiveness and increased operating hours of solar tube wells contribute significantly to their adoption. Farmers' concerns about greater groundwater depletion also influenced their decisions, with those seeing groundwater decline more likely to adopt solar technology. The results also suggest that policies that promote access to credit and reduce the initial cost of solar tube well adoption can further encourage farmer's adoption decision.","PeriodicalId":94022,"journal":{"name":"Ground water","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143392814","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}

引用次数: 0

Dissolved Inorganic Carbon Evolution of Sediment Porewater in the Huixian Wetland, Southwest China. 汇县湿地沉积物孔隙水的溶解无机碳演化

Ground water Pub Date : 2025-01-17 DOI: 10.1111/gwat.13466

Jing Li, Xiaodong Pan, Huanxiong Chen, Congming Huang, Ruirui Cheng

{"title":"Dissolved Inorganic Carbon Evolution of Sediment Porewater in the Huixian Wetland, Southwest China.","authors":"Jing Li, Xiaodong Pan, Huanxiong Chen, Congming Huang, Ruirui Cheng","doi":"10.1111/gwat.13466","DOIUrl":"https://doi.org/10.1111/gwat.13466","url":null,"abstract":"Wetlands, as crucial terrestrial carbon reservoirs, have recently suffered severe degradation due to intense human activities. Lacustrine sediments serve as vital indicators for understanding wetland environmental changes. In the current paper, porewater samples were extracted from lacustrine sediment in three boreholes with a depth of ~75 cm in the Huixian karst wetland, southwest China, to study the chemical and dissolved inorganic carbon (DIC) evolution under anthropogenic influence. Two boreholes are situated beneath the Mudong Lake, while the other one is in the degraded wetland area. The results show that porewater in the central region of Mudong Lake is natural HCO3-Ca type water and recharged by karst groundwater as evidenced by depleted 2H -18O isotopes. Methanogenesis prevails in this area, suggested by positive δ13C values ranging from 4.29‰ to 7.05‰. However, shallow porewater at the western edge of Mudong Lake and porewater in the degraded wetland exhibit significantly higher concentrations of NO3 - and SO4 2-, resulting from the agricultural input and recharged groundwater influenced by oxidation of pyrite. These processes lead to a decrease in methane production and generate DIC through degradation of organic fertilizer and carbonate weathering by sulfuric acid, thereby significantly altering porewater δ13C values. Two types of DIC mixing processes were observed based on the increasing δ13C values with depth, which can be attributed to the unique karst groundwater subsystems. This work highlights the potential impact of human-induced porewater chemical variations on the fate of DIC, particularly in karst wetland environments.","PeriodicalId":94022,"journal":{"name":"Ground water","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143018247","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}

引用次数: 0

Accurate Simulation of Flow through Dipping Aquifers with MODFLOW 6 Using Enhanced Cell Connectivity. 利用增强单元连通性，MODFLOW 6精确模拟倾斜含水层的流动

Ground water Pub Date : 2025-01-16 DOI: 10.1111/gwat.13459

Alden M Provost, Kerry Bardot, Christian D Langevin, James L McCallum

{"title":"Accurate Simulation of Flow through Dipping Aquifers with MODFLOW 6 Using Enhanced Cell Connectivity.","authors":"Alden M Provost, Kerry Bardot, Christian D Langevin, James L McCallum","doi":"10.1111/gwat.13459","DOIUrl":"https://doi.org/10.1111/gwat.13459","url":null,"abstract":"In simulations of groundwater flow through dipping aquifers, layers of model cells are often \"deformed\" to follow the top and bottom elevations of the aquifers. When this approach is used in MODFLOW, adjacent cells within the same model layer are vertically offset from one another, and the standard conductance-based (two-point) formulation for flow between cells does not rigorously account for these offsets. The XT3D multi-point flow formulation in MODFLOW 6 is designed to account for geometric irregularities in the grid, including vertical offsets, and to provide accurate results for both isotropic and anisotropic groundwater flow. A recent study evaluated the performance of the standard formulation and XT3D using a simple, synthetic benchmark model of a steeply dipping aquifer. Although XT3D generally improved the accuracy of flow simulations relative to the standard formulation as expected, neither formulation produced accurate flows in cases that involved large vertical offsets. In this paper, we explain that the inability of XT3D to produce accurate flows in the steeply dipping aquifer benchmark was not due to an inherent limitation of the flow formulation, but rather to the limited cell connectivity inherent in the most commonly used discretization packages in MODFLOW 6. Furthermore, we demonstrate that XT3D is able to produce the expected accuracy when adequate cell connectivity is introduced using MODFLOW's unstructured grid type and the aquifer is discretized vertically using at least two model layers.","PeriodicalId":94022,"journal":{"name":"Ground water","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143018220","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}

引用次数: 0

Applying ²²⁴Ra and ²²³Ra to Trace Lateral Groundwater Discharge into Lake Qinghai, China. 应用 224Ra 和 223Ra 追踪流入中国青海湖的侧向地下水。

Ground water Pub Date : 2024-12-29 DOI: 10.1111/gwat.13461

Weigang Su, Yujun Ma, Qiugui Wang

{"title":"Applying 224Ra and 223Ra to Trace Lateral Groundwater Discharge into Lake Qinghai, China.","authors":"Weigang Su, Yujun Ma, Qiugui Wang","doi":"10.1111/gwat.13461","DOIUrl":"https://doi.org/10.1111/gwat.13461","url":null,"abstract":"Quantifying lacustrine groundwater discharge (LGD) is important for understanding the dynamics of lake ecosystems and their expansion. This study focuses on Lake Qinghai, employing radium isotope models to evaluate the contributions of both shallow and deep groundwater. The data indicate that the activity of 223Ra and 224Ra demonstrates a pronounced gradient, decreasing from the shoreline to the center of Lake Qinghai. Additionally, vertical stratification characteristics were observed. The spatial distribution of radium isotope activity suggests that there is discharge of both shallow and deep groundwater into the lake. Deep groundwater migrates slowly and its apparent age reflects the time elapsed since the water became enriched in Ra and was isolated from the source, in the study system this age is estimated to be 10.1 d. In contrast, shallow groundwater displayed varied apparent ages in different regions: 7.9 d in the north, 13.1 d in the south, and 7.4 d in the southeastern area of the lake. The LGDs of shallow groundwater discharge in the north, south, and southeast areas of Lake Qinghai were estimated by 224Ra as 1.89 × 106 to 2.69 × 106 m3/d, 3.25 × 106 to 3.99 × 106 m3/d, and 4.51 × 106 to 6.33 × 106 m3/d, respectively. For deep groundwater, the LGD was 0.16 × 106 to 0.29 × 106 m3/d. Annually, the total LGD fluxes of shallow and deep groundwater are 27.86 × 108 to 37.59 × 108 m3/year and 0.58 × 108 to 1.06 × 108 m3/year, respectively. This study is the first to evaluate shallow and deep groundwater discharge around the lake. Understanding these discharge dynamics is essential for developing effective management strategies to preserve lake environments.","PeriodicalId":94022,"journal":{"name":"Ground water","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142908013","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}

引用次数: 0