OOIR: Observatory of International Research

Papers

(The TQCC of Hydrogeology Journal is 6. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2020-10-01 to 2024-10-01.)

Article	Citations
Review: Hydrogeology of weathered crystalline/hard-rock aquifers—guidelines for the operational survey and management of their groundwater resources	66
Depletion of groundwater resources under rapid urbanisation in Africa: recent and future trends in the Nairobi Aquifer System, Kenya	40
Review: Advances in the methodology and application of tracing in karst aquifers	35
Quantification and possible causes of declining groundwater resources in the Euro-Mediterranean region from 2003 to 2020	33
Origin and geochemical evolution of groundwater in the Abaya Chamo basin of the Main Ethiopian Rift: application of multi-tracer approaches	31
Site selection for managed aquifer recharge in the city of Kabul, Afghanistan, using a multi-criteria decision analysis and geographic information system	29
Machine-learning-based regional-scale groundwater level prediction using GRACE	28
Management of saltwater intrusion in coastal aquifers using different wells systems: a case study of the Nile Delta aquifer in Egypt	28
The effects of urbanization on the groundwater system of the Kabul shallow aquifers, Afghanistan	25
Improving the spatial resolution of GRACE-based groundwater storage estimates using a machine learning algorithm and hydrological model	25
Delineation of LNAPL contaminant plumes at a former perfumery plant using electrical resistivity tomography	24
Transition from linear to nonlinear flow in single rough fractures: effect of fracture roughness	24
Risk evaluation of mine-water inrush based on principal component logistic regression analysis and an improved analytic hierarchy process	23
Review: Urban groundwater issues and resource management, and their roles in the resilience of cities	22
Long-term trends in karst spring discharge and relation to climate factors and changes	20
A model ensemble generator to explore structural uncertainty in karst systems with unmapped conduits	20
Groundwater vulnerability to pollution in karst aquifers, considering key challenges and considerations: application to the Ubrique springs in southern Spain	19
Estimating surface runoff and groundwater recharge in an urban catchment using a water balance approach	19
Comparisons on the effects of temperature, runoff, and land-cover on carbonate weathering in different karst catchments: insights into the future global carbon cycle	19
Review: Theory-guided machine learning applied to hydrogeology—state of the art, opportunities and future challenges	18
Groundwater and climate change: threats and opportunities	18
Institutional constraints to groundwater resource management in arid and semi-arid regions: a Straussian grounded theory study	18
Analysis of mining-induced variation of the water table and potential benefits for ecological vegetation: a case study of Jinjitan coal mine in Yushenfu mining area, China	18
Predicting water flow in fully and partially saturated porous media: a new fractal-based permeability model	18
Delineation of groundwater potential zones using a parsimonious concept based on catastrophe theory and analytical hierarchy process	18

An evaluation of semidistributed-pipe-network and distributed-finite-difference models to simulate karst systems	18
Simultaneous identification of groundwater contaminant sources and simulation of model parameters based on an improved single-component adaptive Metropolis algorithm	17
Fate of nitrate during groundwater recharge in a fractured karst aquifer in Southwest Germany	16
Anthropogenic and geogenic influences on peri-urban aquifers in semi-arid regions: insights from a case study in northeast Jaipur, Rajasthan, India	16
Integrating field work and large-scale modeling to improve assessment of karst water resources	15
Groundwater contamination source estimation based on a refined particle filter associated with a deep residual neural network surrogate	15
A global perspective on assessing groundwater quality	15
Future-proofing hydrogeology by revising groundwater monitoring practice	15
Groundwater recharge processes in an Asian mega-delta: hydrometric evidence from Bangladesh	14
An analytical methodology to estimate the changes in fresh groundwater resources with sea-level rise and coastal erosion in strip-island unconfined aquifers: illustration with Savary Island, Canada	14
Determining recharge distribution in fractured carbonate aquifers in central Italy using environmental isotopes: snowpack cover as an indicator for future availability of groundwater resources	14
Imbalance in the modern hydrologic budget of topographic catchments along the western slope of the Andes (21–25°S): implications for groundwater recharge assessment	14
Determination of inundation areas within karst poljes and intermittent lakes for the purposes of ephemeral flood mapping	14
Alleviating drought and water scarcity in the Mediterranean region through managed aquifer recharge	14
Runoff and focused groundwater-recharge response to flooding rains in the arid zone of Australia	13
Hydrochemical quality and microplastic levels of the groundwaters of Tuticorin, southeast coast of India	13
Constraining probabilistic chloride mass-balance recharge estimates using baseflow and remotely sensed evapotranspiration: the Cambrian Limestone Aquifer in northern Australia	13
The influence of groundwater abstraction on interpreting climate controls and extreme recharge events from well hydrographs in semi-arid South Africa	13
Restoring groundwater levels after tunneling: a numerical simulation approach to tunnel sealing decision-making	13
Insight into the influence of local streambed heterogeneity on hyporheic-zone flow characteristics	13
Managing groundwater supplies subject to drought: perspectives on current status and future priorities from England (UK)	12
Modeling of groundwater flow and transport in coastal karst aquifers	12
Hydrogeology and geochemistry of the sulfur karst springs at Santa Cesarea Terme (Apulia, southern Italy)	12
Topical Collection: Groundwater recharge and discharge in arid and semi-arid areas of China	12
Hydrogeology and groundwater management in a coastal granitic area with steep slopes in Galicia (Spain)	12
Optimization design and assessment of the effect of seepage control at reservoir sites under karst conditions: a case study in Anhui Province, China	12
Numerical modelling of land subsidence related to groundwater withdrawal in the Firenze-Prato-Pistoia basin (central Italy)	12
A study on groundwater recharge in the Anyanghe River alluvial fan, North China Plain, based on hydrochemistry, stable isotopes and tritium	12
Quantitative analysis of Cenozoic faults and fractures and their impact on groundwater flow in the bedrock aquifers of Ireland	11
Simulation of irrigation-induced groundwater recharge in an arid area of China	11
A geochemical and isotopic assessment of hydraulic connectivity of a stacked aquifer system in the Lisbon Valley, Utah (USA), and critical evaluation of environmental tracers	10
Quantifying the base flow of the Colorado River: its importance in sustaining perennial flow in northern Arizona and southern Utah (USA)	10
Estimation of groundwater recharge rates using soil-water isotope profiles: a case study of two contrasting dune types on Langeoog Island, Germany	10
The use of water stable isotopes for a better understanding of hydrogeological processes in Haiti: overview of existing δ18O and δ2H data	10
Review: Horizontal, directionally drilled and radial collector wells	10
Hydrogeological characterization of the Quaternary aquifer of south Bengal Basin in India and the impact of urbanization on the groundwater resources of the system	10
Revealing vertical aquifer heterogeneity and hydraulic anisotropy by pumping partially penetrating wells	10
Causes and consequences of long-term groundwater overabstraction in Jordan	10
Groundwater metering: revisiting a ubiquitous ‘best practice’	10
Groundwater quality: global challenges, emerging threats and novel approaches	10
Unraveling the time-dependent relevance of input model uncertainties for a lumped hydrologic model of a pre-alpine karst system	9
Experimental observations of aquifer storage and recovery in brackish aquifers using multiple partially penetrating wells	9
Water-gas flow in rough rock fractures: insights from coupled triaxial compression experiments	9
An autoregressive machine learning approach to forecast high-resolution groundwater-level anomalies in the Ramotswa/North West/Gauteng dolomite aquifers of Southern Africa	9
Similarity-based approaches in hydrogeology: proposal of a new concept for data-scarce groundwater resource characterization and prediction	9
Hydrochemistry and environmental isotopes of spring water and their relation to structure and lithology identified with remote sensing methods in Wadi Araba, Egypt	9
Groundwater sources, flow patterns, and hydrochemistry of the Central Yinchuan Plain, China	9
Distribution, threats and protection of selected karst groundwater-dependent ecosystems in the Mediterranean region	9
Groundwater recharge pathways to a weathered-rock aquifer system in a dryland catchment in Burkina Faso	9
Assessment of the effect of water-table depth on riparian vegetation along the middle and lower reaches of the Manasi River, Northwest China	9

Quantitative classification of carbonate aquifers based on hydrodynamic behaviour	9
A density-dependent multi-species model to assess groundwater flow and nutrient transport in the coastal Keauhou aquifer, Hawai‘i, USA	9
Constraints on the hydrogeological properties and land subsidence through GNSS and InSAR measurements and well data in Salmas plain, northwest of Urmia Lake, Iran	9
Numerical simulation of aquifer thermal energy storage using surface-based geologic modelling and dynamic mesh optimisation	9
Regional groundwater flow and the future of hydrogeology: evolving concepts and communication	9
Research on groundwater seepage through fault zones in coal mines	9
Groundwater-level recovery following closure of open-pit mines	8
Economic tradeoff between domestic well impact and reduced agricultural production with groundwater drought management: Tulare County, California (USA), case study	8
Apportioning deformation among depth intervals in an aquifer system using InSAR and head data	8
An improved Bayesian approach linked to a surrogate model for identifying groundwater pollution sources	8
Three-dimensional hydrostratigraphy and groundwater flow models in complex Quaternary deposits and weathered/fractured bedrock: evaluating increasing model complexity	8
Karst-aquifer operational turbidity forecasting by neural networks and the role of complexity in designing the model: a case study of the Yport basin in Normandy (France)	8
Characterization of the subsurface urban heat island and its sources in the Milan city area, Italy	8
Geochemical and isotopic evidence for upward flow of saline fluid to the Mississippi River Valley alluvial aquifer, southeastern Arkansas, USA	8
Control of fracture networks on a coastal karstic aquifer: a case study from northeastern Yucatán Peninsula (Mexico)	8
The effect of hydrogeological and hydrochemical dynamics on landslide triggering in the central highlands of Ethiopia	8
Factors affecting the variation of permeability with depth in carbonate aquifers	8
Estimation of recharge in mountain hard-rock aquifers based on discrete spring discharge monitoring during base-flow recession	8
Hydrodynamics of karst aquifers in metamorphic carbonate rocks: results from spring monitoring in the Apuan Alps (Tuscany, Italy)	8
Impact of mining-induced bed separation spaces on a cretaceous aquifer: a case study of the Yingpanhao coal mine, Ordos Basin, China	8
Application of electrical resistivity to map the stratigraphy and salinity of fluvio-deltaic aquifers: case studies from Bangladesh that reveal benefits and pitfalls	8
Using geophysical data to assess groundwater levels and the accuracy of a regional numerical flow model	8
Numerically enhanced conceptual modelling (NECoM) applied to the Malta Mean Sea Level Aquifer	8
Systematic visual analysis of groundwater hydrographs: potential benefits and challenges	8
Rainfall infiltration boundary conditions and stability of a fractured-rock slope based on a dual-continuum model	8
Comparative application and optimization of different single-borehole dilution test techniques	8
Multiple-tracers-aided surface-subsurface hydrological modeling for detailed characterization of regional catchment water dynamics in Kumamoto area, southern Japan	8
Potential for managed aquifer recharge in southwestern Bangladesh based on social necessity and technical suitability	7
Hydrogeological assessment of springs in the south-central Great Artesian Basin of Australia	7
Groundwater sustainability assessment based on socio-economic and environmental variables: a simple dynamic indicator-based approach	7
Determination of groundwater recharge mechanisms using stable isotopes in small watersheds of the Loess Plateau, China	7
Assessment of the groundwater recharge processes of a shallow and deep aquifer system (Maggiore Valley, Northwest Italy): a hydrogeochemical and isotopic approach	7
Neonicotinoids in groundwater: presence and fate in two distinct hydrogeologic settings in Ontario, Canada	7
A combined analytical-numerical method for groundwater inflow into circular tunnels in drained conditions	7
Quantifying stratigraphic uncertainty in groundwater modelling for infrastructure design	7
The effect of typical geological heterogeneities on the performance of managed aquifer recharge: physical experiments and numerical simulations	7
Evaluation of the influence of river bank infiltration on groundwater in an inland alluvial fan using spectral analysis and environmental tracers	7
Seismically induced changes in groundwater levels and temperatures following the ML5.8 (ML5.1) Gyeongju earthquake in South Korea	7
Review: Hydrogeology of Northern Mendoza (Argentina), from the Andes to the eastern plains, in the context of climate change	7
Coastal groundwater model calibration using filtered and amplified hydraulic information retained in the freshwater–saltwater interface	7
Multifactor analysis of specific storage estimates and implications for transient groundwater modelling	7
Waterwells: how can we make legality more attractive?	7
Source of saline groundwater on tidally influenced blue holes on San Salvador Island, Bahamas	7
The karst water environment in Southeast Asia: characteristics, challenges, and approaches	7
Predicting the impact of management and climate scenarios on groundwater nitrate concentration trends in southern Portugal	6
Effects of land-cover and watershed protection futures on sustainable groundwater management in a heavily utilized aquifer in Hawai‘i (USA)	6
Groundwater recharge to a structurally complex aquifer system on the island of Tobago (Republic of Trinidad and Tobago)	6
Nitrate reduction potential of a fractured Middle Triassic carbonate aquifer in Southwest Germany	6
Challenges and approaches for management of seawater intrusion in coastal aquifers	6
Optimizing urban stormwater control strategies and assessing aquifer recharge through drywells in an urban watershed	6
Structural, geomorphic, and hydrochemical influences on the karst hydrogeology of the Haney Limestone in south-central Kentucky, USA	6
A three-dimensional numerical groundwater flow model to assess the feasibility of managed aquifer recharge in the Tamne River basin of Ghana	6
Geological and groundwater flow model of a submarine groundwater discharge site at Hanko (Finland), northern Baltic Sea	6
Multiple-point statistical modeling of three-dimensional glacial aquifer heterogeneity for improved groundwater management	6
Horizontal two-dimensional groundwater-level fluctuations in response to the combined actions of tide and rainfall in an unconfined coastal aquifer	6
Analyzing spatio-temporal mechanisms of land subsidence in the Parowan Valley, Utah, USA	6
Dams and reservoirs in karst? Keep away or accept the challenges	6
Evaluation of adaptation measures to counteract rising groundwater levels in urban areas in response to climate change	6
Characterising thermal water circulation in fractured bedrock using a multidisciplinary approach: a case study of St. Gorman’s Well, Ireland	6
CC-PESTO: a novel GIS-based method for assessing the vulnerability of karst groundwater resources to the effects of climate change	6
Global analysis of land-use changes in karst areas and the implications for water resources	6
Initiating collective action for the management of deep confined aquifer systems: application of a participatory scenario approach in France	6
Discriminant model and hydrogeochemical processes for characterizing preferential flow paths in four interconnected volcanic aquifers in Costa Rica	6
The 21st century water quality challenges for managed aquifer recharge: towards a risk-based regulatory approach	6
Characteristics of land-subsidence evolution and soil deformation before and after the Water Diversion Project in Beijing, China	6
Hydrogeological classification of municipal solid waste landfill sites in China and correlation with groundwater contaminant migration	6
Temporal interpolation of groundwater level hydrographs for regional drought analysis using mixed models	6
A study of the thermal behaviour of exposed karst water systems in a mountainous area of Zigui County, Hubei Province, Central China	6
Natural occurrence and controls of arsenic in groundwater in a semiarid basin in the Mexican Altiplano	6
Why do we need to care about transboundary aquifers and how do we solve their issues?	6
Enhanced pumping test using physicochemical tracers to determine surface-water/groundwater interactions in an alluvial island aquifer, river Rhône, France	6
Applying a science-forward approach to groundwater regulatory design	6
An analytical method for predicting the groundwater inflow to tunnels in a fractured aquifer	6
Relation of hydraulic conductivity to depth, alteration, and rock type in the volcanic rocks of Pahute Mesa, Nevada, USA	6
Understanding mechanisms of recharge through fractured sandstone using high-frequency water-level-response data	6
Geometry of the modelled freshwater/salt-water interface under variable-density-driven flow (Pétrola Lake, SE Spain)	6
Geostatistical analysis and hydrofacies simulation for estimating the spatial variability of hydraulic conductivity in the Jianghan Plain, central China	6
Application of a novel cascade-routing and reinfiltration concept with a Voronoi unstructured grid in MODFLOW 6, for an assessment of surface-water/groundwater interactions in a hard-rock catchment (S	6