Review
Environmental Sciences
Wiecher Bakx, Victor F. F. Bense, Marios Karaoulis, Gualbert H. P. Oude Essink, Marc F. P. Bierkens
Summary: Reliable estimates of groundwater flow velocities are crucial for protecting and managing drinking water extraction wells in coastal regions with unconsolidated sediments. This article reviews different methods for measuring relatively high groundwater flow velocities near these wells, discussing their potential and limitations. Environmental tracer measurements are useful for regional estimates, while surface-based hydrogeophysical measurements can provide insight into flow patterns. Active-heating distributed temperature sensing (AH-DTS) allows direct measurements of in situ flow velocities and can monitor fluctuations near extraction wells. Combining geoelectrical measurements with AH-DTS may enable a 3D velocity distribution for identifying groundwater flow towards extraction wells.
Article
Water Resources
E. Randall Bayless
Summary: The laboratory evaluations of flowmeter response in fractured-rock simulators revealed that colloidal borescope measurements were positively correlated with applied velocities in all wells and apertures, while heat-pulse flowmeter measurements were significantly lower than applied rates. The colloidal borescope accurately measured directional flow in high velocities, while the heat-pulse flowmeter indicated possible bypassing of water around the instrument. Additionally, the presence of eddy currents affected measurements above or below the central 50% of the fracture in the well.
GROUND WATER MONITORING AND REMEDIATION
(2021)
Article
Geosciences, Multidisciplinary
K. R. Rushton, M. Asaduz Zaman
Summary: Inverted wells can provide the necessary discharge for public water supply, industry, or irrigation in unconsolidated aquifers with limited saturated thickness. They have been successful in older alluvial deposits in northwest Bangladesh, even when the saturated thickness is less than 20 m. Groundwater measurements help understand the flow processes associated with inverted wells. Despite being more expensive, inverted wells have an advantage in reliably extracting water from aquifers with limited saturated thickness.
HYDROGEOLOGY JOURNAL
(2022)
Article
Engineering, Civil
Hongbiao Gu, Shuangshuang Lan, Huang Zhang, Mingyuan Wang, Baoming Chi, Martin Sauter
Summary: This study investigated the influence of dynamic shaking on water level fluctuations in boreholes completed in unconsolidated sediments through laboratory experiments. It found that different water level changes occur following oscillating pore pressure, including oscillation, step-rise, and step-rise with oscillation. Water level declines were observed at frequencies lower than 2 Hz, while the correlation between acceleration and water level change was weak at accelerations less than 0.5 g. The study also showed that sinusoidal wave propagation reduces hydraulic conductivity first sharply, stabilizes, and then slightly increases.
JOURNAL OF HYDROLOGY
(2021)
Article
Water Resources
H. A. Basha
Summary: The study explores the analytical solution of the nonlinear Boussinesq equation using a perturbation series framework, providing approximate solutions for various groundwater flow conditions. By introducing the representative depth parameter alpha, these approximate solutions can accurately simulate the original nonlinear behavior and evaluate different variations in stream level.
ADVANCES IN WATER RESOURCES
(2021)
Article
Geosciences, Multidisciplinary
Philip M. Nyenje, Denis Ocoromac, Stephen Tumwesige, Matt J. Ascott, James P. R. Sorensen, Andrew J. Newell, David M. J. Macdonald, Daren C. Gooddy, Callist Tindimugaya, Robinah N. Kulabako, Dan J. Lapworth, Jan Willem Foppen
Summary: This study conducted detailed monitoring and analysis of weathered basement aquifers in Kampala, Uganda, and identified different groundwater recharge methods and characteristics, providing new insights into water resource management in urban tropical areas.
HYDROGEOLOGY JOURNAL
(2022)
Article
Environmental Sciences
Africa de la Hera-Portillo, Julio Lopez-Gutierrez, Beatriz Mayor, Elena Lopez-Gunn, Hans Jorgen Henriksen, Ryle Norskov Gejl, Pedro Zorrilla-Miras, Pedro Martinez-Santos
Summary: Groundwater stored in aquifers can be influenced by various natural, induced and/or anthropogenic disturbances, with groundwater extraction being the main disturbance. The resilience of aquifers is a key tool in assessing sustainable groundwater management alternatives. Research shows that long-term high quality data is essential for understanding aquifer dynamics.
Article
Engineering, Civil
Naga Venkata Satish Laveti, Ashes Banerjee, Suresh A. Kartha, Subashisa Dutta
Summary: The increased accessibility of groundwater in the alluvial plains of the Kosi river basin has altered the crop calendar and irrigation response of farmers, especially in dry years after 2004. A study developed a framework to analyze the spatio-temporal variation in groundwater recharge/extraction patterns and river-aquifer flux exchange due to increasing anthropogenic activities, finding an increasing trend of river to aquifer flux transfer which may have disturbing long-term effects on river flow and stage.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
C. Labat, F. Larroque, B. de Grissac, A. Dupuy, M. Saltel, P. Bourbon
Summary: Geological deformations like anticlines play a significant role in aquifer system functioning. A multidisciplinary approach is proposed to characterize and quantify the impact of these features. Research in southwestern France has led to a better understanding of the complex architecture of aquifers and their interconnections with confining units.
HYDROGEOLOGY JOURNAL
(2021)
Article
Water Resources
J. R. Kennedy, M. T. Bell
Summary: This study focuses on changes in groundwater storage and their relationship with groundwater-level changes in the groundwater basin underlying the City of Albuquerque. Repeat micro-gravity measurements were used to measure groundwater storage change from 2016 to 2021. The study produced a map of specific yield based on gravity-derived storage change and groundwater-level change, allowing inference of this property over a wide region.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Engineering, Civil
Rachel Housego, Britt Raubenheimer, Steve Elgar, Ming Zhi Wu
Summary: Tides and storm surges have significant effects on groundwater circulation and fluxes in coastal aquifers, however, few studies have investigated the response of coastal aquifers to both forces. This study uses three years of hydraulic head observations in a barrier island to analyze the inland propagation of fluctuations caused by tidal changes and storm-induced surge and wave-driven setup. The study finds that the amplitude attenuation rate of hydraulic head fluctuations is higher than the inland increase in phase lag for tidally-driven fluctuations, and tidal fluctuations deeper in the aquifer lead those nearer the surface, while storm surges have similar rates of amplitude attenuation and phase lag increase and result in depth uniform hydraulic head fluctuations.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Rabilou Abdou Mahaman, Yahaya Nazoumou, Guillaume Favreau, Boukari Issoufou Ousmane, Marie Boucher, Maman Sani Abdou Babaye, Fabrice M. A. Lawson, Jean-Michel Vouillamoz, Abdou Guero, Anatoly Legchenko, Richard Graham Taylor
Summary: In drylands, groundwater is crucial for sustaining water supplies and irrigation. This paper focuses on quantifying groundwater discharge in the fossil tributary of the River Niger in Niger, using piezometry and near-surface geophysics. The study reveals the thickness of saturated alluvium, effective porosities, hydraulic conductivity, and Darcy fluxes, providing important information for sustainable water resource management.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Engineering, Electrical & Electronic
Douwe M. van Willigen, Paul L. M. J. van Neer, Jack Massaad, Nico de Jong, Martin D. Verweij, Michiel A. P. Pertijs
Summary: This study introduces a new method that reduces zero-flow error while maintaining low random error, and can adapt to different hardware configurations. By combining the advantages of cross correlation and zero-crossing detection, an effective ultrasonic flowmeter algorithm has been developed.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Review
Green & Sustainable Science & Technology
Giacomo Medici, Jeff B. Langman
Summary: Aquifer recharge is crucial for understanding groundwater volumes and sustainable use of natural water resources. This study evaluated various methods to determine recharge in a flood basalt terrain, revealing the influence of snowmelt on recharge. By combining groundwater modeling and hydrologic tracers, the appropriate recharge values were determined for different terrains.
Article
Water Resources
Krzysztof Dragon
Summary: This study examines the groundwater flow patterns and chemistry in the studied recharge zone of Quaternary aquifers in Poland. It found that water extraction influences groundwater contamination, leading to different chemistry in deep and shallow parts of the aquifer. The research highlights the importance of using groundwater chemistry to understand groundwater flow systems.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2021)