Article
Multidisciplinary Sciences
Merhawi GebreEgziabher, Scott Jasechko, Debra Perrone
Summary: Most stored groundwater is fossil water, having been underground for over 12,000 years. Mapping wells that tap fossil aquifers is important for managing water quality and quantity. Deep wells that can access fossil aquifers are widespread, although they are outnumbered by shallower wells in most areas. The proportion of newly drilled wells that can access fossil aquifers has increased in recent decades. However, drilling into fossil aquifers does not necessarily lead to groundwater depletion, as fossil groundwater can still be replenished. The results emphasize the importance of safeguarding the quality and quantity of fossil groundwater to meet current and future water demands.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Stjepan Strelec, Kristijan Grabar, Jasmin Jug, Nikola Kranjcic
Summary: Groundwater is increasingly used for heating and cooling buildings and regulating industrial temperatures due to its renewable energy potential and environmental friendliness. Research shows that both the distance between wells and industrial utility lines can impact the thermal field transmission in groundwater systems.
Article
Engineering, Civil
Hwa-Lung Yu, Shih-Yao Lee, Hua-Ting Tseng, Ying-Fan Lin
Summary: Aquifer pumping is a common method of meeting water needs, but it can disrupt groundwater flow and cause fluctuations in groundwater levels. This study developed a new impulse response function for transfer function modeling that accurately describes confined flow and can estimate hydrogeological parameters and pumping rates without knowing specific details about the pumping wells. The function was shown to be effective in estimating essential parameters using only drawdown time series data from an observation well.
JOURNAL OF HYDROLOGY
(2023)
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
Environmental Sciences
Sun Woo Chang, Sama S. Memari, T. Prabhakar Clement
Summary: The Theis equation is a mathematical model used for analyzing drawdown data in pumping tests. A complex graphical procedure is typically employed for fitting this nonlinear equation to estimate aquifer parameters. Advances in coding platforms like Python have enabled the development of scripts like PyTheis, which can efficiently evaluate aquifer parameters and associated errors in pump test data.
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
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
S. P. Shinde, V. N. Barai, Nadhir Al-Ansari, B. K. Gavit, S. A. Kadam, A. A. Atre, R. D. Bansod, Ahmed Elbeltagi
Summary: This study conducted various tests on 12 wells in the Buchakewadi watershed to measure parameters of the basaltic rock aquifer. It focused on determining the transmissivity and storativity of the aquifer through hydrodynamic analysis and in situ well-pumping tests. The results of aquifer mapping and pumping tests are important for addressing water scarcity and health concerns related to fresh water sources.
APPLIED WATER SCIENCE
(2022)
Article
Environmental Sciences
Vadim Yapiyev, Pekka M. Rossi, Pertti Ala-Aho, Hannu Marttila
Summary: Groundwater in shallow aquifers used for community water supply in cold climates is vulnerable to contamination from land-use and surface water intrusion. This study used stable water isotopes data, precipitation data, Geographic Information System analysis, and multivariate statistics to assess surface water intrusion risks and recharge conditions in Northern Finland. The results showed that warm season precipitation contributes to about 60% of the annual precipitation, and the aquifers have a mixture of warm and cold season precipitation. The use of stable water isotopes with lc-excess is a useful approach for assessing recharge and contamination risks in water management.
WATER RESOURCES RESEARCH
(2023)
Article
Water Resources
Sebastian Mueller, Falk Hesse, Sabine Attinger, Alraune Zech
Summary: Pumping tests are useful tools for characterizing aquifer properties and identifying heterogeneity characteristics. The extended Generalized Radial Flow Model is presented to combine well flow characterization in fractal geometry with conductivity upscaling for pumping tests in heterogeneous media. Through upscaling procedures, effective conductivities for uniform and well flow conditions are derived, reflecting the impact of heterogeneity on average drawdowns.
ADVANCES IN WATER RESOURCES
(2021)
Article
Geosciences, Multidisciplinary
Jesus Diaz-Curiel, Barbara Biosca, Lucia Arevalo-Lomas, Maria Jesus Miguel, Natalia Caparrini
Summary: This paper reports on the development of a new hydraulic interpretation method for a better characterization of continental hydrological basins. The method provides the actual distribution of horizontal permeability throughout the aquifer at depth by considering the differences of the effective pressure gradient experienced by different flow stretches.
HYDROLOGY AND EARTH SYSTEM SCIENCES
(2022)
Article
Environmental Sciences
Peipeng Wu, Jean-Christophe Comte, Lijuan Zhang, Shuhong Wang, Bin Chang
Summary: The study suggests that surface water level fluctuations have significant impacts on the performance of near-bank managed aquifer recharge, including fluctuations in groundwater table, dynamic changes in artificially recharged water lens morphology, and discharge from the aquifer.
Article
Environmental Sciences
Daniel R. Hadley, Daniel B. Abrams, Devin H. Mannix, Cecilia E. Cullen
Summary: This study discusses the depletion of the Cambrian-Ordovician sandstone aquifer and develops a conceptual framework using a participatory groundwater modeling approach. Results show that even with a 35% reduction in water use, many areas remain at high or severe risk. The participatory modeling process highlights the importance of considering pumping levels at production wells for assessing aquifer sustainability and risk.
WATER RESOURCES RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Miao Jing, Chunhui Lu, Chaojun Sun, Estanislao Pujades, Yu Ye, Teng Xu, Xiaowen Sun
Summary: This paper presents a novel analytical approach to estimate groundwater travel time distribution in urban areas, considering the impervious urban structure and modified aquifer hydraulic properties. The proposed analytical model is verified through comparison with numerical results and sensitivity analysis. The results show that urban groundwater travel time distribution is strongly dependent on construction-related parameters and aquifer compressibility, suggesting the need for adaptive groundwater management strategies for different aquifer types. The proposed model has important implications for water resources management, urban groundwater utilization, and aquifer quality in urban areas.
HYDROGEOLOGY JOURNAL
(2023)
Article
Environmental Sciences
Shuai Zhang, Xu-Sheng Wang
Summary: As a widely used method for in situ remediation of groundwater contamination, the pump-and-treat (PAT) system involves the management of water recirculation between extraction and injection wells. This study develops analytical models for an unconfined aquifer treated by different system settings, including one extraction well and one injection well or two injection wells. The study highlights the role of regional groundwater flow and provides new insights into recirculation zones and ratios between extraction and injection wells.