Geophysical and geotechnical characterization of shallow subsurface soil: a case study of University of Peshawar and surrounding areas

Islam, Ihtisham; Ahmed, Waqas; Rashid, Mehboob ur; Orakzai, Azmat Ullah; Ditta, Allah

doi:10.1007/s12517-020-05947-x

Cited by 12 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is due to the fact that the soil's shift from a liquid to a plastic state occurs at the liquid limit, which is an empirically determined moisture level. When a soil is dried in an oven at a temperature no greater than 110℃, the amount of water present in the gaps between soil grains is measured as the soil's moisture content [25,[61][62][63]. The amount of moisture has a significant impact on how the soil behaves.…”

Section: Electrical Resistivity Of Soil and Identification Of Void Ra...mentioning

confidence: 99%

Comprehension of Energy-Based Methods for Investigating Soil Suffusion Uncertainties

Ahmad,

Ahmadi,

Najar

et al. 2024

IJDNE

View full text Add to dashboard Cite

Section: Electrical Resistivity Of Soil and Identification Of Void Ra...mentioning

confidence: 99%

Comprehension of Energy-Based Methods for Investigating Soil Suffusion Uncertainties

Ahmad,

Ahmadi,

Najar

et al. 2024

IJDNE

View full text Add to dashboard Cite

“…The geological units exposed in the study area are mostly Potwar clay (clay and gravel), lei conglomerate (clay and silt), and soan formation (conglomerate, sandstone, clay stone, and siltstone) [64,65]. The complex tectonics and geology of Islamabad pose challenges for water recharge and storage capabilities [59,[64][65][66][67][68]. The study focuses on conducting resistivity surveys at Bara Kahu and Aabpara-G13 sites to comprehend the deeper aquifer's potential, considering accessibility, time, and budget constraints (Figure 1b).…”

Section: Study Areamentioning

confidence: 99%

Assessment of Potential Potable Water Reserves in Islamabad, Pakistan Using Vertical Electrical Sounding Technique

Rashid,

Kamran,

Zeb

et al. 2023

Hydrology

Self Cite

View full text Add to dashboard Cite

This study aimed to investigate the potential reserves of potable water in Islamabad, Pakistan, considering the alarming depletion of water resources. A detailed vertical electrical sounding (VES) survey was conducted in two main localities: Bara Kahu (Area 1) and Aabpara to G-13 (Area 2), based on accessibility, time, and budget constraints. A total of 23 VES measurements were performed, with 13 in Area 1 and 10 in Area 2, reaching a maximum depth of 500 m. Geologs and pseudosections were generated to assess lithological variations, aquifer conditions, and resistivity trends with depth. Statistical distribution of resistivity (SDR), hydraulic parameters, true resistivity, macroanisotropy, aquifer depth and thickness, and linear regression (R2) curves were calculated for both areas, providing insights into the aquifer conditions. The results revealed that the study areas predominantly consisted of sandy lithology as the aquifer horizon, encompassing sandstone, sandy clay, and clayey sand formations. Area 2 exhibited a higher presence of clayey horizons, and aquifers were generally deeper compared to Area 1. The aquifer thickness ranged from 10 m to 200 m, with shallow depths ranging from 10 m to 60 m and deeper aquifers exceeding 200 m. Aquifers in Area 1 were mostly semi-confined, while those in Area 2 were predominantly unconfined and susceptible to recharge and potential contamination. The northwest–southeast side of Area 1 exhibited the highest probability for ground resource estimation, while in Area 2, the northeast–southwest side displayed a dominant probability. The study identified a probable shear zone in Area 2, indicating lithological differences between the northeast and southwest sides with a reverse sequence. Based on the findings, it is recommended that the shallow aquifers in Area 1 be considered the best potential reservoir for water supply. In contrast, deeper drilling is advised in Area 2 to ensure a long-lasting, high-quality water supply. These results provide valuable information for water resource management and facilitate sustainable water supply planning and decision making in Islamabad, Pakistan.

show abstract

“…In the three researched regions in Brazil, Gonçalves et al [3] discovered a linear relationship between the SPT N-value and electrical resistivity for various layers. Electrical resistivity and the SPT N-value exhibit a positive and strong quadratic correlation, according to Islam et al [16]. The reduced correlation caused by lower clay content was another reason the authors suggested that the SPT N-value was reliant on clay content.…”

Section: Introductionmentioning

confidence: 95%

Geological and Climatic Factors Affecting the Correlation between Electrical Resistivity and SPT N-Value in Sandy Soils of Phuket, Thailand

Puttiwongrak,

Keo,

Vann

et al. 2023

Geosciences

View full text Add to dashboard Cite

Understanding the technical properties of the subsurface soil is essential for carrying out any building project correctly. In sandy soils in Phuket, Thailand, a correlation between electrical resistivity and the SPT N-value should be established in design to cut down on the time and expense of engineering field work for site investigation operations. Using the least squares method, the data of electrical resistivity and SPT N-values were fitted for regression analysis, and the behavior of the fitting coefficients was examined under various soil conditions found in the field. The factors affecting the link between electrical resistivity and the SPT N-value were found using data classifications of geology and climate. Phuket is located in a humid tropical region with frequent heavy rainstorms and extended periods of high temperatures and is composed of two main distinct geological areas: (1) igneous rock and (2) sedimentary and metamorphic rocks. According to the geological classification, the regression parameter (R2) of the relationship between the electrical resistivity and SPT N-values somewhat increased from a straightforward plot (R2 = 0.0171) to 0.1721, and the geology and climate data categorization revealed the best fit which is an exponential model (R2 = 0.6175). By re-examining the two VES lines under the identical bedrock and climate characteristics as the original model, the relative R2 of 0.5519 validates the association between electrical resistivity and SPT N-values. It is important to emphasize that the geology and climate of the collected data have an impact on the correlation model. Furthermore, a geotechnical investigation should be used to confirm the findings of an electrical resistivity survey as a preliminary tool to assess any problematic subsurface zones. However, more field test data from diverse places must be acquired in order to establish the relationship between the SPT N-value and electrical resistivity of sandy soils.

show abstract

Geophysical and geotechnical characterization of shallow subsurface soil: a case study of University of Peshawar and surrounding areas

Cited by 12 publications

References 32 publications

Comprehension of Energy-Based Methods for Investigating Soil Suffusion Uncertainties

Comprehension of Energy-Based Methods for Investigating Soil Suffusion Uncertainties

Assessment of Potential Potable Water Reserves in Islamabad, Pakistan Using Vertical Electrical Sounding Technique

Geological and Climatic Factors Affecting the Correlation between Electrical Resistivity and SPT N-Value in Sandy Soils of Phuket, Thailand

Contact Info

Product

Resources

About