Hydrogeology Journal最新文献_第6页

Effective method for identification of preferential flow paths in two-dimensional discrete fracture networks based on a flow resistance method 基于流动阻力法识别二维离散断裂网络中优先流动路径的有效方法

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-02-19 DOI: 10.1007/s10040-024-02772-4

Lei Ma, Xuelin Cui, Chunchao Zhang, Jiazhong Qian, Di Han, Yongshuai Yan

{"title":"Effective method for identification of preferential flow paths in two-dimensional discrete fracture networks based on a flow resistance method","authors":"Lei Ma, Xuelin Cui, Chunchao Zhang, Jiazhong Qian, Di Han, Yongshuai Yan","doi":"10.1007/s10040-024-02772-4","DOIUrl":"https://doi.org/10.1007/s10040-024-02772-4","url":null,"abstract":"Preferential flow is usually characterized by rapid and concentrated fluid flow in fractured geological media, and preferential flow paths (PFP) dominate the fluid flux and velocity. Therefore, the identification of PFP is significant for quantitatively characterizing fluid flow in fractured media, especially in discrete fracture networks (DFN). The traditional methods of identifying PFP need to solve groundwater flow models; however, such models are limited by complex groundwater-related problems, the need for detailed hydrogeological survey data, and a high computational workload. In this study, a graph-theory-based flow resistance method is proposed for identifying the PFP in DFN. The method uses the flow resistance of fracture trace lines to identify the corresponding minimum resistance path. The flow resistance is defined as the weighted factor between the adjacent nodes in the fracture network based on the formula of the modified cubic law, and then the Dijkstra algorithm is used to determine the minimum resistance path. The flow resistance method is verified through case analysis by numerical simulation with COMSOL Multiphysics. The results show that the fluid tends to flow along the path with less flow resistance, and the minimum resistance path is essentially consistent with the preferential flow path. The method only needs to extract flow resistance values from the geometric parameters of the fractures, and then quickly analyze the fracture-network pathways to identify the preferential flow path. The method provides an effective and efficient way of identifying the preferential flow path without resorting to complex groundwater flow models to find the solution.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"29 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139911305","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

Identification of the correlation between land subsidence and groundwater level in Cangzhou, North China Plain, based on time-series PS-InSAR and machine-learning approaches 基于时间序列 PS-InSAR 和机器学习方法的华北平原沧州地区地面沉降与地下水位相关性识别

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-02-06 DOI: 10.1007/s10040-024-02771-5

Mouigni Baraka Nafouanti, Junxia Li, Hexue Li, Mbega Ramadhani Ngata, Danyang Sun, Yihong Huang, Chuanfu Zhou, Lu Wang, Edwin E. Nyakilla

{"title":"Identification of the correlation between land subsidence and groundwater level in Cangzhou, North China Plain, based on time-series PS-InSAR and machine-learning approaches","authors":"Mouigni Baraka Nafouanti, Junxia Li, Hexue Li, Mbega Ramadhani Ngata, Danyang Sun, Yihong Huang, Chuanfu Zhou, Lu Wang, Edwin E. Nyakilla","doi":"10.1007/s10040-024-02771-5","DOIUrl":"https://doi.org/10.1007/s10040-024-02771-5","url":null,"abstract":"Land deformation is a severe environmental problem that is often caused by groundwater overexploitation. Traditional approaches, such as those based on ground leveling, are used as standard for monitoring land deformation, but they cannot collect enough information for land-deformation mapping. In this study, the time-series Persistent Scatterer Interferometry Synthetic Aperture Radar (PS-InSAR) was used as an improved method to identify land deformation in Cangzhou after the initiation of China’s South-to-North Water Diversion Project (SNWDP). Machine learning (ML) models, including random forest and k-nearest neighbor, were used to determine the relationship between groundwater pressure and land deformation. The results showed that from 2018 to 2022, the deformation rate was up to –115 mm/year in Nanpi and Dongguang and varied between –57 and –26 mm/year in Qingxian and Cangxian. Land deformation after the SNWDP implementation was less than before. The ML models’ results show that the accuracy of the random forest and k-nearest neighbor methods were 85 and 77%, respectively. Evaluation of the groundwater-level trend measured in six wells showed that after the SNWDP implementation, the groundwater pressure started to recover in Cangzhou, but a decline has been observed recently, particularly in 2022. The mean decrease in impurity (MDI) values demonstrates that aquifers IV and III contribute the most to land deformation in Cangzhou, with the highest MDI values of 33 and 26%, respectively. The study provides new insights into the evolution of regional land deformation, and the methods employed in this research can be adopted in other regions with similar conditions.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"6 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139773231","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

Delineating groundwater potential zones with GIS and analytic hierarchy process techniques: the case of Great Ruaha River catchment, Tanzania 利用地理信息系统和层次分析法划定地下水潜力区：坦桑尼亚大鲁阿哈河流域案例

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-27 DOI: 10.1007/s10040-024-02769-z

Ramadhani Twaha, Joel Nobert, Augustina C. Alexander, Deogratias M.M. Mulungu, Mathew Senga

{"title":"Delineating groundwater potential zones with GIS and analytic hierarchy process techniques: the case of Great Ruaha River catchment, Tanzania","authors":"Ramadhani Twaha, Joel Nobert, Augustina C. Alexander, Deogratias M.M. Mulungu, Mathew Senga","doi":"10.1007/s10040-024-02769-z","DOIUrl":"https://doi.org/10.1007/s10040-024-02769-z","url":null,"abstract":"The Great Ruaha River Catchment (GRC) in Tanzania is facing severe water scarcity due to the growing number of water users in the catchment. The surface-water resources are under stress, leading to increasing dependence on groundwater for water supply. This study aimed to identify and map groundwater potential areas in the GRC using a geographic information system (GIS), remote sensing techniques, and analytic hierarchy process multi-criteria decision analysis (AHP MCDA) tools. The thematic maps representing lithology, lineaments density, precipitation, soil, slope, drainage density, geomorphology, and land use were used to create a groundwater potential zones (GWPZ) map by weighted linear combination (WCL). The results showed that 70% (~60,044 km2) of the catchment area is in zones with moderate groundwater potential, 21.9% (~18,720 km2) in high groundwater potential zones, and 7.87% (~6,726 km2) in low groundwater potential zones. These results highlight the catchment’s overall groundwater potential and identify areas with scarce resources that should be prioritized for protective measures. Watershed managers and policymakers can use this information to make informed decisions on groundwater use and protection, and determine suitable areas for new wells that may have greater yield.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"13 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139585231","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

Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad 乍得北部努比亚砂岩含水层系统的渗透和补给动态

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-23 DOI: 10.1007/s10040-024-02765-3

{"title":"Infiltration and recharge dynamics in the Nubian Sandstone Aquifer System of northern Chad","authors":"","doi":"10.1007/s10040-024-02765-3","DOIUrl":"https://doi.org/10.1007/s10040-024-02765-3","url":null,"abstract":"<h3>Abstract</h3> The Nubian Sandstone Aquifer System (NSAS) is one of the world’s largest fossil groundwater resources. In northern Chad, notably in the areas of the Tibesti and Ennedi mountains, precipitation occurs seasonally with rates up to 150 mm year–1. This precipitation could lead to diffuse recharge, as well as concentrated recharge along the episodically flooded wadis. Although it is clear that infiltration occurs under flooded areas, it is unknown if and to what extent the infiltration can recharge groundwater. This study combines remote sensing data on precipitation, evapotranspiration, and the temporal and spatial dynamics of the flooded areas with chemical and stable isotopic data from groundwater and surface water sampled between 2013 and 2016. The combination of these data shows that (1) the only area where diffuse recharge occurs is in the southern area of the Ennedi mountains, where concentrated recharge through the wadis occurs concurrently during the month of August, and (2) southeast of the Tibesti and north of the Ennedi mountains, only concentrated recharge occurs. The length of the flooded areas and thus the spatial extent of concentrated recharge varies significantly from year to year and can last up to 3 months. The study has shown that modern recharge does occur in northern Chad, but to a very limited extent, both in space and time. This means that achieving sustainable management of this renewable resource can only be considered through rigorous quantitative assessments. Furthermore, these findings have important implications for future studies on the regional dynamics of the NSAS.","PeriodicalId":13013,"journal":{"name":"Hydrogeology Journal","volume":"10 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139551971","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

Preface: Hydrogeology of arid environments 前言干旱环境水文地质学

IF 2.8 3区地球科学

Hydrogeology Journal Pub Date : 2024-01-11 DOI: 10.1007/s10040-023-02763-x

Stephan Schulz, Viviana Re, Seifu Kebede, Osman Abdalla, Wenke Wang, Craig Simmons, Nils Michelsen

引用次数: 0

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