| dc.description.abstract | The Special Region of Yogyakarta (DIY), particularly the New
Yogyakarta International Airport (NYIA) area, lies in a region highly
susceptible to liquefaction due to significant seismic activity and unique
geological conditions. This study aims to analyze the liquefaction
potential using geotechnical and geophysical approaches and compare
the advantages of both methods. The geotechnical approach employs
Standard Penetration Test (SPT) data from 17 observation points to
calculate the Cyclic Stress Ratio (CSR), Cyclic Resistance Ratio (CRR),
and Factor of Safety (FS) using deterministic and probabilistic methods.
Meanwhile, the geophysical approach utilizes shear wave velocity data
(Vs30) from the United States Geological Survey (USGS) to spatially
analyze liquefaction potential. The analysis indicates that the NYIA area
is classified as having medium soil density, with Vs30 values ranging
from 229.342 m/s to 283.965 m/s, and exhibits a high liquefaction
susceptibility, with an average probability exceeding 85%, particularly
at depths up to 10 meters. Spatial modeling using ArcGIS provides
liquefaction risk maps, offering a visual representation of soil
vulnerability distribution. This study highlights the advantage of the
geotechnical approach in providing specific point-based data, while the
geophysical approach is more efficient for analyzing broader areas.
This information is crucial for disaster mitigation and infrastructure
planning in strategic areas like NYIA. | en_US |
