Geophysical mapping of contaminant leachate around a reclaimed open dumpsite

Raji, Wasiu O.; Adeoye, T.O.

doi:10.1016/j.jksus.2016.09.005

Cited by 34 publications

(13 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Current density pseudo-section ( Figures 2-6) was produced from the real component data using a linear filter [20] of the KHFILT inversion software [31]. The Karous-Hjelt filter produces a 2D conductive model of the subsurface by converting the secondary magnetic field into current density depth [9,32]. In order to compensate for the reduction of VLF-EM with depth in a conducting medium, the skin depth of the inversion software was used [9].…”

Section: Acquisition Of Vlf-em Datamentioning

confidence: 99%

“…The Karous-Hjelt filter produces a 2D conductive model of the subsurface by converting the secondary magnetic field into current density depth [9,32]. In order to compensate for the reduction of VLF-EM with depth in a conducting medium, the skin depth of the inversion software was used [9]. The separation distance used for the acquisition of data was a factor of available space.…”

Section: Acquisition Of Vlf-em Datamentioning

confidence: 99%

“…Similarly, the authors of [8] used VLF-EM at Isara-Remo, southwestern Nigeria, to identify fissures that are potential zones for groundwater in basement rocks. In addition, Raji and Adeoye [9] used coupled VLF and resistivity approach to delineate leachate plume at a reclaimed open dumpsite. In all of these studies, tremendous success was achieved from the usage of VLF-EM.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessing the Protective Capacity of Aquifers Using Very-Low-Frequency Electromagnetic Survey

et al. 2018

View full text Add to dashboard Cite

The protective capacity of aquifers is a prerequisite for groundwater quality in areas prone to contamination from the ground surface. Aquifers without protective layers are more susceptible to contaminations from point and non-point sources. The protective capacity of an aquifer significantly correlates with the thickness of clay and organic materials that mantled it. To assess aquifer protective capacity, electrical conductivity property of saturated clay was determined from filtered imaginary and real components of Very Low-Frequency Electromagnetic (VLF-EM). The filtered real components against distance and current density pseudo-section produced from real components were concomitantly used for interpretation. Clays capping aquifers were delineated from those without capping from low and high values of filtered imaginary and real components and current density pseudo-section. The distribution of clay laterally across the area indicates that aquifers are poorly protected and susceptible to contaminations from a point and non-point sources. The apparent agreement between inferred geology from VLF-EM interpretation, borehole data and resistivity data underscores the efficacy of VLF-EM as an important tool that can be used or combined with other geophysical methods and borehole information/data for assessment of the protective capacity of the aquifer.

show abstract

Section: Acquisition Of Vlf-em Datamentioning

confidence: 99%

Section: Acquisition Of Vlf-em Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessing the Protective Capacity of Aquifers Using Very-Low-Frequency Electromagnetic Survey

et al. 2018

View full text Add to dashboard Cite

show abstract

“…It can also be used in the management of groundwater to prevent over-withdrawal that may cause aquifer damage, and in policy formulation. The data can be integrated with other geophysical and geological data for multipurpose applications in landfill siting, groundwater pollution control, dam site selection and other civil engineering applications [1] , [2] , [3] , [4] . The data can form a part of a large database or repository for regional hydrogeological study in Nigeria and Africa.…”

Section: Value Of the Datamentioning

confidence: 99%

Geo-resistivity data set for groundwater aquifer exploration in the basement complex terrain of Nigeria, West Africa

Raji

Abdulkadir

2020

Data in Brief

View full text Add to dashboard Cite

To delineate prolific groundwater aquifers in the basement complex terrain of Ilorin, Nigeria, West Africa, a carefully designed Electrical Resistivity Surveys were undertaken at eighty-five (85) stations using Vertical Electrical Sounding (VES) technique with Schlumberger array. Data acquisition system comprised SAS 3000 ABEM Resistivity Meter, a D. C. battery, four metallic electrodes, electrical cables, portable Geographic Positioning System (GPS), hammers, measuring tapes, and other accessories. In addition to the resistivity data, the geographic coordinates of the survey points were measured for ease of geo-referencing of the exact points where the data were collected and for secondary use of the data. The data acquired were processed, analysed and interpreted using auxiliary curve matching techniques and computer iteration method. The results were used to: evaluate the subsurface in terms of the different geo-electric layers, their thicknesses, depths, and resistivities; evaluate the groundwater potential of the aquifer; identify suitable sites for locating boreholes for groundwater exploitation; and recommend depths to borehole bottom in the different parts of the study area. The data presented can be reused to determine the protective capacity of the overburden material against groundwater contamination; to determine the engineering-geophysics and geotechnical properties of the rocks for Civil Engineering applications; for predicting groundwater flow models; and for mineral exploration within the area. The data presented can be used with other geophysical and geological data acquired from the same area for a better evaluation of the subsurface for multipurpose applications.

show abstract

“…Due to the easy operation of the instrument, the speed of field surveys, and low operating costs, this method is particularly well suited for a rapid initial survey and has been widely used in many geophysical studies since the 1960s [2]. On the other hand, the Resistivity method is the most widely used geophysical method for the evaluation of waste disposal sites because it is fast, reliable, affordable, and nondestructive [3]. Both methods have been successfully used to identify and evaluated landfills, leachate flow, groundwater contamination, and geo-electric layers [2]- [6].…”

Section: Introductionmentioning

confidence: 99%

Identification of Soil Contamination using VLF-EM and Resistivity Methods: A Case Study

Inayah

Santosa

Warnana

et al. 2019

JTS

View full text Add to dashboard Cite

Hazardous waste is a waste with properties which can pollute and damage the environment, human health, and other living things. Lakardowo is a village that is suspected of being contamination by hazardous waste derived from industrial activities. Measurements with the VLF-EM and Resistivity method were used in this study. In addition, groundwater level mapping and soil sampling in locations around the industry were conducted for the XRF test. Groundwater mapping results show that groundwater flow leads to the Northeast-South and Southwest of the industrial site. The soil samples that have been tested by XRF show the presence of heavy metals, wherein hazardous wastes generally contain various types of heavy metals that are conductive or have low resistivity values. Quantitative interpretation of VLF-EM data shows the presence of low resistivity anomalies at several measurement sites, which are suspected of having been contaminated with soil by waste. Resistivity data processing results, showing a low resistivity anomaly (≤ 3 Ω.m) located to the north (near an industrial site) and spreading towards the southwest along the measurement path. The result of a combination of quantitative interpretations of both methods, obtained, the direction of anomalous flow of hazardous waste moves southeastward and towards deeper soil coating following the direction of rock coating.

show abstract

Geophysical mapping of contaminant leachate around a reclaimed open dumpsite

Cited by 34 publications

References 23 publications

Assessing the Protective Capacity of Aquifers Using Very-Low-Frequency Electromagnetic Survey

Assessing the Protective Capacity of Aquifers Using Very-Low-Frequency Electromagnetic Survey

Geo-resistivity data set for groundwater aquifer exploration in the basement complex terrain of Nigeria, West Africa

Identification of Soil Contamination using VLF-EM and Resistivity Methods: A Case Study

Contact Info

Product

Resources

About