Geoelectrical Techniques For Subsurface Characterization And Contaminant Plume Images At Landfill Sites

Abdulrahman, Abdullahi (2016) Geoelectrical Techniques For Subsurface Characterization And Contaminant Plume Images At Landfill Sites. PhD thesis, Universiti Sains Malaysia.

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Abstract

Garis panduan tafsiran untuk analisis model songsangan yang dihasilkan bagi keberintangan elektrik dan kebolehcas di dua tapak pelupusan semi-aerobik yang dinaik taraf telah dibangunkan. Model songsangan yang dihasilkan daripada program songsangan 2D (RES2DINV) telah digunakan untuk menetapkan grid-grid pengimejan keberintangan dan kebolehcas di tapak pelupusan. Kajian mengesahkan bahawa keberintangan rendah (<10 Ωm) menunjukkan kepulan air larut lesap manakala unit kebolehcas tinggi (>70 ms) mewakili deposit sisa dan lapisan tanah liat tepu. Tambahan pula, sambutan IP pada kepulan air larut lesap hiliran yang disebarkan daripada tapak pelupusan separa aerobik yang berasingan telah dinilai. Penilaian juga meneliti status bahan cemar dan mengklasifikasikan strata di bawah tapak pelupusan perbandaran sisa pepejal. Hasil kajian menunjukkan kepulan yang didominasi oleh ion memaparkan zon kebolehcas yang lemah (<20 ms) dan menyokong polarisasi ionik berbanding polarisasi elektronik sebagai sambutan IP. An interpretation template for the analysis of electrical resistivity and chargeability inverse models produced at two upgraded semi-aerobic landfill sites was developed. The inverse models generated from a 2D inversion program (RES2DINV) were used to set up grids of resistivity and chargeability imaging at the landfill sites. The study confirmed a low resistivity (<10 Ωm) depicting leachate plume while a high chargeability unit (>70 ms) represents waste deposits and saturated clayey layers. Furthermore, the IP responses of the disseminated leachate plume downstream of a separate landfill site were assessed. The appraisal also examines the contaminant status and classified the strata beneath municipal solid waste landfills. The outcome of the investigation showed that the ion-dominated plume displays a weak chargeability zone (<20 ms) and supports ionic polarization rather than electronic polarization in its IP responses.

Item Type:	Thesis (PhD)
Subjects:	Q Science > QC Physics > QC1 Physics (General)
Divisions:	Pusat Pengajian Sains Fizik (School of Physics) > Thesis
Depositing User:	Mr Noorazilan Noordin
Date Deposited:	15 Feb 2017 04:19
Last Modified:	12 Apr 2019 05:25
URI:	http://eprints.usm.my/id/eprint/32079

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