Analisis gerakan tanah dengan metode geolistrik daerah Lembang, Desa Sunten Jaya, Jawa Barat.
P enelitian dilakukan di daerah lembang, desa sunten , Jawa Barat..Tujuan penelitian iniuntuk mengetahui kondisi lereng daerah penelitian terhadap gerakan tanah yang ditinjaubedasarkan 2 metode yaitu metode geolistrik dan koefisien permeabilitas. Geolistrikmerupakan salah satu metode geofisika yang bertujuan mengetahui sifat-sifat kelistrikanlapisan batuan dibawah permukaan tanah dengan cara menginjeksikan arus listrik kedalam tanah. Koefisien permeabilitas digunakan untuk mengetahui besarnya rembesanpada permasalahan bendungan, saluran irigasi, tanggul utama, sumur resapan danlainnya.Metode Geolistrik dilakukan pada koordinat 6°50'13.86"S 107°42'19.08"E ,6°50'6.70"S 107°42'19.37"E, 6°50'4.86"S 107°42'11.86"E dan 6°50'12.21"S107°42'12.70"E. Selanjutnya dilakukan pngetesan 4 permeabilitas tanah dengan wakturata-rata 4 menit 36 detik dengan hasil klasifikasi rata-rata permeabilitas tanah menurutUnhald dan O’neil (1979) 3.984 cm jam-1 yaitu sedang.Kesimpulan dari analisis iniadalah line 2 , line 3 , line 4 mempunyai resiko paling besar untuk terjadi pergerakantanah bedasarkan analisis geolistrik dan koefisien tanah dikarenakan adanya sumber mataair yang nantinya bisa membahayakan jika adanya gempa.Kondisi sub-surface lokasipengamatan dipenuhi oleh batuan low resistivity batu tufpasiran dan sedikit batuan highresistivity dan pada line 2 , line 3 dan line 4 ditemukan sumber mata air.
T he research was conducted in the Lembang fault area, sunten village, West Java. Thepurpose of this study was to determine the condition of the slopes of the study area onsoil movements which were reviewed based on 2 methods, namely the geoelectricmethod and the permeability coefficient. Geoelectricity is a geophysical method that aimsto determine the electrical properties of rock layers below the soil surface by injecting anelectric current into the soil. The permeability coefficient is used to determine the amountof seepage in the problem of dams, irrigation canals, main embankments, infiltrationwells and others. Geoelectric method is carried out at coordinates 6 ° 50'13.86 "S 107 °42'19.08" E, 6 ° 50'6.70 "S 107 ° 42'19.37 "E, 6 ° 50'4.86" S 107 ° 42'11.86 "E and 6 °50'12.21" S 107 ° 42'12.70 "E. Subsequently, 4 soil permeability was carried out with anaverage time of 4 minutes 36 seconds with the results of the classification of the averagesoil permeability according to Unhald and O'neil (1979) 3.984 cm hour-1, which ismoderate. The conclusion of this analysis is line 2, line 3 , line 4 has the greatest risk forsoil movement based on geoelectric analysis and soil coefficient due to the presence ofsprings which can be dangerous in the event of an earthquake. The sub-surface conditionsof the observation location are filled with low resistivity tuffs and few high resistivityrocks and line 2, line 3 and line 4 springs were found.