Aulia, Siti Aisyah (2026) Identifikasi Zona Kontaminan Pascakejadian Kebocoran Tangki Bawah Tanah SPBU Menggunakan Metode Electrical Resistivity Tomography (ERT) Time-lapse dan Ground Penetrating Radar di Desa Tempurejo, Kecamatan Pesantren, Kota Kediri. Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5017221063-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5017221063-Undergraduate_Thesis.pdf Restricted to Repository staff only Download (10MB) | Request a copy |
Abstract
Kebocoran tangki penyimpanan bahan bakar bawah tanah (Underground Storage Tank/UST) pada Stasiun Pengisian Bahan Bakar Umum (SPBU) di Desa Tempurejo, Kota Kediri berpotensi mencemari air tanah dangkal di sekitar lokasi. Penelitian ini bertujuan mengidentifikasi zona kontaminan dan hubungan anomali geofisika dengan indikasi kontaminan hidrokarbon bawah permukaan pascakejadian kebocoran menggunakan metode Electrical Resistivity Tomography (ERT) time-lapse dan Ground Penetrating Radar (GPR). Pengukuran ERT dilakukan pada empat lintasan sepanjang 120 m dalam dua periode, yaitu tahun 2024 sebagai baseline (t₁) dan tahun 2025 sebagai periode pemantauan (t₂). GPR diakuisisi secara overlapping pada lintasan yang sama dengan pengukuran ERT tahun 2025. Muka air tanah teridentifikasi pada kedalaman ±3–4 m dengan arah aliran NE–SW. Zona terindikasi kontaminan dicirikan oleh anomali resistivitas menengah–tinggi (22–79,6 ohm-m) yang membentuk pola plume lateral di zona kapiler, berkorelasi dengan anomali amplitudo tinggi dan reflektor tidak kontinu pada radargram GPR. Analisis time-lapse menunjukkan pergeseran lateral zona anomali dari periode 2024 ke 2025 searah aliran air tanah, mengindikasikan adanya redistribusi kontaminan yang dikontrol oleh sistem aliran air tanah setempat.
==================================================================================================================================
A leakage from an underground storage tank (UST) at a gas station in Tempurejo Village, Kediri City potentially contaminated the shallow groundwater in the surrounding area. This study aims to identify contaminant zones and evaluate the relationship between geophysical anomalies and subsurface hydrocarbon contamination indicators following the leakage incident using time-lapse Electrical Resistivity Tomography (ERT) and Ground Penetrating Radar (GPR). ERT measurements were conducted along four transects of 120 m length in two periods: 2024 as the baseline (t₁) and 2025 as the monitoring period (t₂). GPR data were acquired overlapping the same transects as the 2025 ERT survey. The water table was identified at a depth of ±3–4 m with a NE–SW groundwater flow direction. Contaminant zones are characterized by medium-to-high resistivity anomalies (22–79.6 ohm-m) forming lateral plume patterns at the capillary zone, correlating with high-amplitude anomalies and discontinuous reflectors on GPR radargrams. Time-lapse analysis reveals a lateral shift of anomaly zones from 2024 to 2025 consistent with the groundwater flow direction, indicating contaminant redistribution controlled by the local groundwater flow system.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Air Tanah, Electrical Resistivity Tomography (ERT) Time-lapse, Ground Penetrating Radar (GPR), Kontaminasi, LNAPL, Contamination, Electrical Resistivity Tomography (ERT), Ground Penetrating Radar (GPR), Groundwater, LNAPL |
| Subjects: | G Geography. Anthropology. Recreation > GB Physical geography > GB1003.2 Groundwater. Q Science > QE Geology > QE33.2.R33 Ground penetrating radar |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis |
| Depositing User: | Siti Aisyah Aulia |
| Date Deposited: | 29 Jun 2026 00:56 |
| Last Modified: | 29 Jun 2026 00:56 |
| URI: | http://repository.its.ac.id/id/eprint/133979 |
Actions (login required)
 |
View Item |