IDENTIFIKASI DAERAH POTENSI LIKUIFAKSI PULAU BALI BAGIAN SELATAN BERDASARKAN DATA GROUND PENETRATING RADAR (GPR), GEOLISTRIK RESESTIVITAS PEMBORAN TEKNIK; IDENTIFICATION OF LIQUIFACTION POTENTIAL AREA IN SOUTHERN BALI ISLAND BASED ON GROUND PENETRATING RADAR (GPR), GEOELECTRICITY AND BOREHOLE DATA

RAHMAT NAWI SIREGAR, Sismanto

2015 | Disertasi | FMIPA

Ground penetrating radar (GPR), geolectricity (dipole-dipole configuration) and borehole surveys were applied to identify liquefaction potential area in southern Bali island. In order to clarify shallow subsurface information and liquefaction potential area dissemination, this research was correlated with borehole data. The surveys were conducted in 16 GPR sites, 12 geoelectricity sites, and 8 borehole sites. GPR data proccessed with GPR reflexwave software and geoelectricty with Earthimager and Res2dinv. The result was overlayed with borehole data. GPR and Geoelectricity data revelead sand-silt-clay subsurface with 5,00 – 23,6 ? m resistivity at 0 5 meter depth and shallow groundwater with 0,265 – 17,1 ? m resistivity at 0 – 7 meter depth of IMB,SMT, PKS, SAR, PSH, KSMN, BAL, KMP1, KTH, and MEN sites. Fines diameter measurment in Sanur, Sarangan, Tanjung Benoa, and Tuban performed sand-silt-clay materials had < 20% percent finer and categorized as high potential of liquefaction.

Kata Kunci : N