REVIEW OF IDENTIFIED SHORTCOMINGS IN AQUIFER VULNERABILITY ASSESSMENTS DOI Creative Commons

Anthony Okeh,

Abu Mallam,

Osagie Abel Uyimwen

et al.

Journal CleanWAS, Journal Year: 2023, Volume and Issue: 7(1), P. 20 - 29

Published: Jan. 18, 2023

Several studies have successfully carried out aquifer vulnerability evaluations using a combination of geophysical and biogeochemical methods. Unfortunately, some identified shortcomings often led to inaccurate assessments. This review attempts identify these drawbacks suggest better ways improve upon analysis interpretation results. Articles reviewed were sourced publicly subjected systematic based on fundamental principles. The outcomes each discussed, among which was study that applied Ohmega Resistivity meter acquire Self-Potential (SP) data without specifying the nature electrode used. result indicated large SP readings ≥200mV attributed high fluid flow. According analysis, when copper stakes are used, spurious occur in contrast lower values roughly 10 mV suitable non-polarizable electrodes Cu/CuSO4 porous pots utilized collect data. made clear importance providing detailed explanation materials Another solely collected samples for groundwater quality assessments during dry season, ignoring effects seasonal variation water parameters. must had an impact results investigations. Research examined problems Gosa area Abuja, utilizing only Vertical Electrical Sounding (VES) technique. suggested basaltic intrusion as probable cause borehole failures area. A different research incorporated VES from hill-shaded Shuttle Radar Topography Mission (SRTM), insufficient interconnectivity within fractures conditions controlling occurrence illustrated need integrating methods effective target detection. To map infiltration leachate into subsurface, Studies, however, showed method provided average resistivity readings, suppressing features. 2-D imaging more accurate obtained via ADMT Groundwater Detector. At stage, author interpreted VES, perceived their principles methodologies different. noted presented categorizing Aquifer Protective Capacity (APC) rating percentages (%). It assessed framework accurately categorized APC transversal common statistics guidelines would it simpler understand aided decision-making. Future is advised take flaws account order enhance processing interpretation.

Language: Английский

Demystifying the decadal shift in the extent of groundwater in the coastal aquifers of Gujarat, India: A case of reduced extent but increased magnitude of seawater intrusion DOI
Manish Kumar, Durga Prasad Panday, Chandrashekhar Bhagat

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 898, P. 165451 - 165451

Published: July 12, 2023

Language: Английский

Citations

44
Evaluating the Impact of Mitigation Measures on Shallow Groundwater Salinization in a Coastal Subsided Plain DOI

C. H. Tsai,

Xinren Zhang,

Yuka Ito

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Specific features of electrical resistivity tomography in coastal areas of sea waters DOI

REN YIQIANG,

В.В. Глазунов,

Н. Н. Ефимова

et al.

Published: May 7, 2025

Abstract The article considers a possibility of using electrical resistivity tomography to assist the engineering and geological surveys conducted within coastal sea waters. efficiency in aquatic seafloor modifications for investigating structure territories freshwater water areas is estimated. Basic geoelectrical models bottom sandy clay sediments with different mineralization are synthesized. influence geomorphology zone on dispersed soils analysed. pattern pore mineralization, temperature mineral content rocks ascertained. results computer modelling sections made it possible substantiate advantages ocean studying marine territories. experimental presented confirming investigate Sea Okhotsk Black sections.

Language: Английский

Citations

0
Multi-dimensional characterization of groundwater distribution in sub-Himalayan region of Pakistan DOI
Ali Yousaf Khan, Abrar Niaz, Umair Bin Nisar

et al.

Environmental Earth Sciences, Journal Year: 2024, Volume and Issue: 83(2)

Published: Jan. 1, 2024

Language: Английский

Citations

3
Beyond the Wedge: Impact of Tidal Streams on Salinization of Groundwater in a Coastal Aquifer Stressed by Pumping and Sea‐Level Rise DOI Creative Commons
Mary Hingst, Rachel Housego,

Changming He

et al.

Water Resources Research, Journal Year: 2024, Volume and Issue: 60(10)

Published: Sept. 27, 2024

Abstract Saltwater intrusion (SWI) is a well‐studied phenomenon that threatens the freshwater supplies of coastal communities around world. The development and advancement numerical models has led to improved assessment risk salinization. However, these studies often fail include impact surface waters as potential sources aquifer salinity how they may SWI. Based on field‐collected data, we developed regional, variable‐density groundwater model using SEAWAT for east Dover, Delaware. In this location, major users from surficial are City Dover irrigation agriculture. Our includes salinized marshland tidal streams, along with municipal pumping wells. Model scenarios were run 100 years included changes in rates sea‐level rise (SLR). We examined drivers SWI affect extent location salinization by evaluating differences chloride concentration near subsurface freshwater‐saltwater interface. found presence marsh inverts typical wedge interface edge did not migrate farther inland. Additionally, streams dominant pathways at our site being exacerbated SLR. results also show spatial distribution affects both magnitude salinization, an increase concentrated leading more intensive than widely distributed same total volume.

Language: Английский

Citations

2
Geophysical assessment of seawater intrusion: the Volturno Coastal Plain case study DOI Creative Commons
Daniela Tarallo, Ines Alberico, Giuseppe Cavuoto

et al.

Applied Water Science, Journal Year: 2023, Volume and Issue: 13(12)

Published: Nov. 14, 2023

Abstract In coastal alluvial plains, the variability of sedimentary inputs, tectonic and eustatism causes a complex subsurface geology which influences position fresh/saltwater interface. Furthermore, in these areas densely populated, over-pumping freshwater, coupled with climate change events, promotes landward migration freshwater/saltwater boundary. This research illustrates ability geophysical tools to recognize presence salt/brackish water at Volturno Coastal Plain, Southern Italy. area is characterized by peculiar geological setting, due proximity Somma–Vesuvio Campi Flegrei volcanic areas, profoundly circulation groundwater. The mainly by: (i) two denser layers located − 10 m 20 depth part prevents vertical groundwater, (ii) facies heteropy that facilitates hydraulic connection between different bodies, (iii) discontinuous Campanian Ignimbrite deposits favor deeper shallower aquifers. this framework, 2D-ERT 3D-ERT integrated Downhole, Multichannel Analysis Surface Waves boreholes made possible main zones salt brackish waters, respectively. first zone, very low resistivity (≤ 1 Ωm) typical water, stretches 1.5 km inland from coast. second 2 5 Ωm continues for other 3 inland. knowledge useful engagement all stakeholders (farmers, ranchers policy makers) sustainable use fresh making management plan operational tools.

Language: Английский

Citations

4
Hydrogeochemical characteristics of shallow groundwater and salinization evaluation in the coastal aquifers of Cangzhou, China DOI Creative Commons
Li Hui, Yang Liu, Chaoyue Wang

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: May 16, 2024

To investigate the hydrogeochemical characteristics of shallow groundwater and evaluate salinization state in Cangzhou, China, two sampling campaigns have been conducted. In summer, 33 samples, 3 seawater samples 5 river water were collected. winter, 22 The hydrochemical type was determined by Piper diagram. Evolution mechanisms analyzed Gibbs trend de-salinization or facies evolution grade evaluated both intrusion quality index (GQI SWI ) attribute recognition model based on entropy weight (ARMEW). diagram shows that Na + is dominant cation Cl - anion groundwater, this area mainly Cl-Na followed Cl-Ca·Mg type. evaporation-crystallization process has significant influence saline groundwater. most brackish exhibit compositions freshening stage with direct exchange, at reverse exchange. compared to summer season, more middle study trend, without obvious Na-HCO facies. values GQI range from 20.47 75.38 an average 59.31. gradually increases east west, denoting degree alleviated coast inland. 54.47 79.09 66.00, slightly higher than summer. proportion no (Grade I), minor II) serious III) Cangzhou identified ARMEW 3.0%, 21.2% 75.8% respectively. 9.1% for Grade II 90.9% III. largest II, presents III seasons. Compared index, gives conservative evaluation results salinization. provide useful information status local area, help management resources Cangzhou.

Language: Английский

Citations

1
Groundwater Salinization Challenges in Agriculturally Valuable Low-Lying North Sea Region: A Review DOI Creative Commons
Joan Nyika, Daniel Magnone, Iain Gould

et al.

Cleaner Water, Journal Year: 2024, Volume and Issue: 2, P. 100052 - 100052

Published: Oct. 23, 2024

Language: Английский

Citations

0
REVIEW OF IDENTIFIED SHORTCOMINGS IN AQUIFER VULNERABILITY ASSESSMENTS DOI Creative Commons

Anthony Okeh,

Abu Mallam,

Osagie Abel Uyimwen

et al.

Journal CleanWAS, Journal Year: 2023, Volume and Issue: 7(1), P. 20 - 29

Published: Jan. 18, 2023

Several studies have successfully carried out aquifer vulnerability evaluations using a combination of geophysical and biogeochemical methods. Unfortunately, some identified shortcomings often led to inaccurate assessments. This review attempts identify these drawbacks suggest better ways improve upon analysis interpretation results. Articles reviewed were sourced publicly subjected systematic based on fundamental principles. The outcomes each discussed, among which was study that applied Ohmega Resistivity meter acquire Self-Potential (SP) data without specifying the nature electrode used. result indicated large SP readings ≥200mV attributed high fluid flow. According analysis, when copper stakes are used, spurious occur in contrast lower values roughly 10 mV suitable non-polarizable electrodes Cu/CuSO4 porous pots utilized collect data. made clear importance providing detailed explanation materials Another solely collected samples for groundwater quality assessments during dry season, ignoring effects seasonal variation water parameters. must had an impact results investigations. Research examined problems Gosa area Abuja, utilizing only Vertical Electrical Sounding (VES) technique. suggested basaltic intrusion as probable cause borehole failures area. A different research incorporated VES from hill-shaded Shuttle Radar Topography Mission (SRTM), insufficient interconnectivity within fractures conditions controlling occurrence illustrated need integrating methods effective target detection. To map infiltration leachate into subsurface, Studies, however, showed method provided average resistivity readings, suppressing features. 2-D imaging more accurate obtained via ADMT Groundwater Detector. At stage, author interpreted VES, perceived their principles methodologies different. noted presented categorizing Aquifer Protective Capacity (APC) rating percentages (%). It assessed framework accurately categorized APC transversal common statistics guidelines would it simpler understand aided decision-making. Future is advised take flaws account order enhance processing interpretation.

Language: Английский

Citations

0