Hydrogeology Journal最新文献_第6页

How low-velocity non-Darcian flow in low-permeability media controls the leakage characteristics of a leaky aquifer system 低渗透性介质中的低速非达西流如何控制渗漏含水层系统的渗漏特性

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-10 DOI: 10.1007/s10040-023-02764-w

Xianmeng Meng, Ge Yan, Lintao Shen, Maosheng Yin, Dengfeng Liu

{"title":"How low-velocity non-Darcian flow in low-permeability media controls the leakage characteristics of a leaky aquifer system","authors":"Xianmeng Meng, Ge Yan, Lintao Shen, Maosheng Yin, Dengfeng Liu","doi":"10.1007/s10040-023-02764-w","DOIUrl":"https://doi.org/10.1007/s10040-023-02764-w","url":null,"abstract":"The distribution of saline water in the upper aquifer and freshwater in the lower aquifer is a characteristic of groundwater resources in the North China Plain (NCP). The phenomenon of groundwater depression cones in confined aquifers, primarily caused by excessive groundwater extraction, has been extensively documented. In line with Darcy’s law, it is noteworthy that the migration of shallow groundwater into confined aquifers can occur due to a substantial difference in hydraulic head between the unconfined and confined aquifer systems. However, based on the monitoring data, the quality of deep groundwater generally remains good. This paper attempts to explain this phenomenon from the perspective of non-Darcian flow in aquitards. A finite difference method is used to solve low-velocity non-Darcian flow to a well in the NCP. The mathematical model considers the threshold pressure gradient to describe non-Darcian flow in the aquitard and assumes Darcian and horizontal flows for both shallow and confined aquifers. The comparison with traditional Darcian flow indicates that the leaky area decreases rapidly when considering the threshold pressure gradient. The leaky area is negatively correlated with the aquitard thickness and the transmissivity of the confined aquifer, and positively correlated with the pumping rate. The non-Darcian vertical flow velocity is significantly lower than that obtained from Darcian theory. The vertical velocity difference between Darcian and non-Darcian flows is significant under the situation of a small aquitard thickness, large pumping rate, low transmissivity and large leakage coefficient when the threshold pressure gradient is large.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"61 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139422614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Aflaj–aquifer interconnectivity in northern Oman, revealed from geochemical and isotopic composition of aflaj waters 从阿夫拉杰水的地球化学和同位素组成揭示阿曼北部阿夫拉杰-含水层之间的相互联系

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-02 DOI: 10.1007/s10040-023-02756-w

Khadija Semhi, Osman Abdalla, Rashid Al Abri

{"title":"Aflaj–aquifer interconnectivity in northern Oman, revealed from geochemical and isotopic composition of aflaj waters","authors":"Khadija Semhi, Osman Abdalla, Rashid Al Abri","doi":"10.1007/s10040-023-02756-w","DOIUrl":"https://doi.org/10.1007/s10040-023-02756-w","url":null,"abstract":"The aflaj system in Oman is an ancient irrigation network that delivers water supply to the local population, using gravity transport from the aflaj’s water sources. Ensuring the sustainability of these water sources is crucial, and a thorough understanding of recharge and hydrodynamic relationships among different aflaj is necessary for future planning and development. Major chemical and isotope compositions, including 2H, 18O, and Sr, are used in this study to identify the sources of water in different aflaj systems and explore connectivity among the various hydrologic systems. The investigation covers a 38,325-km2 area in northern Oman, focusing on springs (ainy aflaj), groundwater collection channels (daoodi aflaj), and surface-water collectors (ghaili aflaj). The primary aquifers in the region include Hajar Super Group (HSG), Ophiolite, Tertiary, Alluvium, and Hawasina. The chemistry of aflaj waters is mainly controlled by evaporation and weathering processes. The 2H vs 18O data display a slope of 5.04, indicating the influence of evaporation. Analyzing the 2H vs 18O data reveals two groups of springs: one group is recharged from the HSG and Hawasina aquifers, while the other is recharged from HSG and Ophiolite. Daoodi aflaj, on the other hand, are primarily recharged from HSG and Ophiolite, with some contribution from Hawasina. The Mg/Ca ratio exhibits a connection between waters from Hawasina and both HSG and Ophiolite, indicating their hydraulic connectivity. This study suggests that all aflaj receive water contributions from at least two aquifer units, with HSG being the primary source of recharge before connecting with other aquifers.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"219 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139082725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Shallow-subsidence vulnerability in the city of New Orleans, southern USA 美国南部新奥尔良市的浅层地基脆弱性

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-02 DOI: 10.1007/s10040-023-02762-y

Sanneke van Asselen, Gilles Erkens, Molly E. Keogh, Roelof Stuurman

{"title":"Shallow-subsidence vulnerability in the city of New Orleans, southern USA","authors":"Sanneke van Asselen, Gilles Erkens, Molly E. Keogh, Roelof Stuurman","doi":"10.1007/s10040-023-02762-y","DOIUrl":"https://doi.org/10.1007/s10040-023-02762-y","url":null,"abstract":"Land subsidence in the city of New Orleans (USA) and its surroundings increases flood risk, and may cause damage to buildings and infrastructure and loss of protective coastal wetlands. To make New Orleans more resilient to future flooding, a new approach for groundwater and subsidence management is needed. As a first step in developing such an approach, high-quality and high-resolution subsurface and groundwater information was collected and synthesized to better understand and quantify shallow land subsidence in New Orleans. Based on the collected field data, it was found that especially the low-lying areas north and south of the Metairie-Gentilly (MG) Ridge are most vulnerable to further subsidence; north of the MG Ridge, subsidence is mainly caused by peat oxidation and south of the MG Ridge mainly by peat compaction. At present, peat has compacted ~31% on average, with a range of 9–62%, leaving significant potential for further subsidence due to peat compaction. Phreatic groundwater levels drop to ~150 cm below surface levels during dry periods and increase to ~50 cm below surface during wet periods, on average. Present phreatic groundwater levels are mostly controlled by leaking subsurface pipes. Shallow groundwater in the northern part of New Orleans is threatened by salinization resulting from a reversal of groundwater flow following past subsidence, which may increase in the future due to sea-level rise and continued subsidence. The hydrogeologic information provided here is needed to effectively design tailor-made measures to limit urban flooding and continued subsidence in the city of New Orleans.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"79 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139082881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A hydrogeological overview of the Upper Mega Aquifer System on the Arabian Platform 阿拉伯平台上特大含水层系统水文地质概览

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-02 DOI: 10.1007/s10040-023-02760-0

引用次数: 0

Method of evaluating the radius of influence of a circulating well based on hydraulic head difference 根据水头差评估循环井影响半径的方法

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2023-12-29 DOI: 10.1007/s10040-023-02754-y

{"title":"Method of evaluating the radius of influence of a circulating well based on hydraulic head difference","authors":"","doi":"10.1007/s10040-023-02754-y","DOIUrl":"https://doi.org/10.1007/s10040-023-02754-y","url":null,"abstract":"<h3>Abstract</h3> The radius of influence of a vertical circulation well was studied, taking the difference between the hydraulic head caused by the operation of the vertical circulation well and the initial state of the hydraulic head as the index. Based on the influence of well operation, the aquifer properties and technical parameters of the vertical circulation well on hydraulic head difference, an evaluation method for determining the radius of influence of the well was constructed. The software COMSOL Multiphysics was used to simulate the variation in hydraulic head and the flow field under different working conditions. The results show that increasing the operating time and flow rate, with an increased horizontal permeability, could lead to an increase of the influence radius, while an increase in the vertical permeability could lead to a decrease in the influence radius. Running time, horizontal permeability, vertical permeability, the distance between the lower screen section and the waterproof bottom plate, and the distance between the upper and lower screen sections, all have a great influence on the flow field. Thus, a calculation formula for quantitatively estimating the radius of influence of vertical circulation wells was obtained.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"62 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139067911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Interpretation of hydrogeochemistry of the Upper Freshwater Molasse (Obere Süßwassermolasse) in the Munich area (Bavaria, Germany) using multivariate analysis and three-dimensional geological modelling 利用多元分析和三维地质建模解读慕尼黑地区（德国巴伐利亚州）上层淡水摩拉斯（Obere Süßwassermolasse ）的水文地球化学特征

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2023-12-27 DOI: 10.1007/s10040-023-02761-z

Aleksandra Kiecak, Jan Huch, Alberto Albarrán-Ordás, Lilian Chavez-Kus, Kai Zosseder

{"title":"Interpretation of hydrogeochemistry of the Upper Freshwater Molasse (Obere Süßwassermolasse) in the Munich area (Bavaria, Germany) using multivariate analysis and three-dimensional geological modelling","authors":"Aleksandra Kiecak, Jan Huch, Alberto Albarrán-Ordás, Lilian Chavez-Kus, Kai Zosseder","doi":"10.1007/s10040-023-02761-z","DOIUrl":"https://doi.org/10.1007/s10040-023-02761-z","url":null,"abstract":"Intense use of groundwater in urban areas requires appropriate monitoring, which in turn necessitates proper data management with employment of increasingly sophisticated statistical methods and mapping tools. An example of such an urban area with intensive use of groundwater is the study area of GeoPot Project, namely Munich (Germany) and its surroundings. The aim of the presented study was to provide a description of the hydrogeochemical characteristics of the aquifers occurring in the Quaternary and Upper Freshwater Molasse (German: Obere Süßwassermolasse – OSM) sediments and to further improve the understanding of interactions between the aquifers. The focus was put on the identification of hydrochemical facies, the chemical signatures of different water types, an understanding of occurring processes, and spatial relationships between the aquifers. In order to deal with hydrogeochemical data generated for this study, as well as with data coming from existing external databanks (e.g. BIS-BY), a methodology of quality assurance was developed. The analytical methods focused on multivariate statistics. To enhance the interpretation of the obtained clusters, a recently developed three-dimensional geological model was used for better understanding and presentation. It was found that in the study area, deeper aquifer systems represent the most distinct hydrogeochemical signature of the Na–HCO3 water type. In the remaining clusters, a transition from deeper (alkaline) to shallow (alkaline-earth) groundwater can be observed. The results of the study can be utilized for improved, sustainable groundwater management.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"11 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Groundwater level monitoring using exploited domestic wells: outlier removal and imputation of missing values 利用已开采的家用水井监测地下水位：异常值去除和缺失值估算

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2023-12-23 DOI: 10.1007/s10040-023-02740-4

{"title":"Groundwater level monitoring using exploited domestic wells: outlier removal and imputation of missing values","authors":"","doi":"10.1007/s10040-023-02740-4","DOIUrl":"https://doi.org/10.1007/s10040-023-02740-4","url":null,"abstract":"<h3>Abstract</h3> Groundwater-level monitoring networks provide vital information for hydrogeological studies. Including exploited domestic wells in these monitoring networks can provide a low-cost means of obtaining a broader set of data; however, the use of these sites is limited because the frequent pumping of these wells generates outliers in the recorded time series. Here a slope criterion is applied to identify and remove outliers from groundwater-level time series from exploited domestic wells. Nonetheless, eliminating outliers creates a problem of missing values, which biases the subsequent time series analysis. Thus, 14 imputation methods were used to replace the missing values. The proposed approach is applied to groundwater-level time series from a monitoring network of 20 wells in the Lanaudière region, Québec, Canada. The slope criterion proves very effective in identifying outliers in exploited domestic wells. Missing values generated by outlier removal can reach up to 99% of the recorded data. Among the characteristics of the missing value pattern, the gap size and the position of the gaps along the time series are the most important parameters that affect the performance of the 14 imputation methods. Of the imputation methods tested, linear interpolation and Stineman interpolation, and then Kalman filtering, were the most effective. The present study demonstrates that exploited domestic wells can be used for groundwater monitoring by removing the outliers and imputing the missing values.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"19 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139027454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Jakarta groundwater: victim of its own success 雅加达地下水：自身成功的牺牲品

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2023-12-16 DOI: 10.1007/s10040-023-02758-8

Paul Whincup, Riza Oktavianus, Chandra Egy

引用次数: 0

Transpiration from crystalline unconfined aquifers as the cause of groundwater salinization in a semiarid area of Brazil 造成巴西半干旱地区地下水盐碱化的结晶非承压含水层蒸腾作用

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2023-12-13 DOI: 10.1007/s10040-023-02755-x

Marjorie Beate Kreis, Jean-Denis Taupin, Patrick Lachassagne, Nicolas Patris, Eduardo Sávio Passos Rodrigues Martins

{"title":"Transpiration from crystalline unconfined aquifers as the cause of groundwater salinization in a semiarid area of Brazil","authors":"Marjorie Beate Kreis, Jean-Denis Taupin, Patrick Lachassagne, Nicolas Patris, Eduardo Sávio Passos Rodrigues Martins","doi":"10.1007/s10040-023-02755-x","DOIUrl":"https://doi.org/10.1007/s10040-023-02755-x","url":null,"abstract":"The high groundwater salinity of crystalline aquifers in semiarid areas is generally attributed to the dissolution and leaching of meteoric salts that have been progressively evapoconcentrated in the different hydrological compartments under dry climate conditions. A numerical model, simulating water and salt balances, was developed from a case study in Northeast Brazil to: (1) test the validity of this hypothesis, through the quantification of all relevant water cycle processes in the studied watershed, and (2) demonstrate how changes in land cover can impact groundwater salinity. Computations showed that the aridity and the high evapo(transpi)ration rates from the unsaturated zone and/or surface water (ponds, reservoirs) cannot lead to the observed aquifer salinization levels, but only to concentrations of a few tens or hundreds of mg L–1 (Cl–). The only process that can induce a high groundwater salinity, with chloride concentrations up to several g L–1, is the transpiration of groundwater by the deep roots of the vegetation, with a rate reaching 100% of the annual recharge. In this case study, the vegetation involved is the native Caatinga forest. Simulations of the long-term dynamics of groundwater salinity indicate that aquifer areas with high salinity are relicts of the Caatinga pre-colonization period during which subterranean endorheic conditions were prevailing. Following the Caatinga deforestation linked to colonial agricultural development, aquifer recharge increased and endorheism ceased. Consequently, these aquifers may have now been experiencing a desalination process for about three centuries. The desalination spatial variability drivers are explained in the paper.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"10 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138581160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Long datasets for improved understanding, management and protection of groundwater 用于更好地了解、管理和保护地下水的长期数据集

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2023-12-13 DOI: 10.1007/s10040-023-02759-7

John Chilton, Stephen Foster

引用次数: 0