ANALISIS DAERAH RAWAN LONGSOR MENGGUNAKAN DATA MIKROSEISMIK DI DESA KALIBENING, MAJATENGAH, DAN SIDAKANGEN, KECAMATAN KALIBENING, KABUPATEN BANJARNEGARA; ANALYSIS OF LANDSLIDE VULNERABILITY ZONE USING MICROSEISIMIC DATA IN KALIBENING, MAJATENGAH, AND SIDAKANGEN VILLAGES, KALIBENING SUB-DISTRICT, BANJARNEGARA REGENCY

Arfiansah, Ihsan, Imam Suyanto

2015 | Skripsi | FMIPA

Landslides is one of the natural disaster which threaten Indonesian citizens. Beside material losses, landslides can cause the death. Kalibening Sub-district, Banjarnegara Regency is one of the vulnerable landslides area. This sub-district is located at over 1000 amsl with slope is between 15%-40%. Population growth in this area is increasing rapidly. Therefore, some efforts are required to solve the landslides in Kalibening Sub-district. One of the effort is creating landslide vulnerability zone map using microseismic data. Microseismic measurement data on July 22 – 29, 2015 in Kalibening, Majatengah, and Sidakangen Villages, Kalibening Sub-District, Banjarnegara Regency are processed using HVSR method. The result are dominant frequency and amplification value in that area. Based on the result, shear strain value is obtained. This analysis continued using slope and land-usage as the parameters to know the vulnerability landslides zone. The analysis showed three vulnerability landslides zones in this area with the number of shear strain are more than 0,010. The A and B zones are located in residential areas and highway, while the C zone is located on the foothpath.

Kata Kunci : microseismic; HVSR; landslides; shear strain