ACADSTAFF UGM
| Title | : | The Effect of Weathered Layer Thickness and Slope on Potential Areas of Landslides in Gerbosari Village, Samigaluh District, Kulonprogo Regency, Indonesia |
| Author | : |
NOVIA NURUL KHAYATI (1) Dr. Sudarmaji, M.Si. (2) Dr. Eddy Hartantyo, M.Si. (3) |
| Date | : | 23 2022 |
| Keyword | : | landslides, weathered layer thickness, microzonation, HVSR , Gerbosari Village landslides, weathered layer thickness, microzonation, HVSR , Gerbosari Village |
| Abstract | : | Gerbosari Village has a history of landslides with intensity and risk of 56 occurrences over 5 years. Gerbosari Village, Samigaluh District, KulonprogoRegency is located at geographic coordinates 7◦38 '45.33 "-7◦41' 35.24" LS and 100◦9 '20.80 "-110◦11' 16.52" BT with topographic conditions at an altitude around 500 -1000 mdpl. This study aims to determine the subsurface structure of landslide-prone areas in the form of weathered layer thickness and the effect of slope in landslide-prone areas so that it can be used in making micro zonation maps of landslide-prone areas. This study uses 43 microtremor data with a distance between points of 650 m. The microtremor signal was analysed using the horizontal to vertical spectrum ratio ( HVSR) method. From the measurement results, it is obtained that the value of the dominant frequency ranges from 1 -22 Hz, the value of the amplification factor is obtained in the range of 1 -10.5, the value of the peak ground acceleration ranges from 60 -300 cm/s2, the thickness of the weathered layer is obtained in the range of 12 -22 meters. Based on the results of the slope analysis, the study area is on a slope classified as a bit steep -very steep |
| Group of Knowledge | : | Geofisika |
| Original Language | : | English |
| Level | : | Nasional |
| Status | : |
Published
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