MODEL LONGSOR AKIBAT PERUBAHAN IKLIM DENGAN MENGGUNAKAN DIGITAL ELEVATION MODELS DAN GEOSLOPE

Mawardi Mawardi(1),
(1) ProgramStudi Teknik Sipil, Fakultas Teknik UNIB, 

Abstract


Landslides often occur on steep slopes and are common in the rainy season, and landslides on a
slope are difficult to detect early. This research is laboratory research and field research. In this
research, slope slope data uses manual measurement data and elevation models digitization data,
for soil data: soil data properties and strong shear data using geotechnical laboratory test data.
Analysis of slope stability with Geoslope devices, Digital Elevation Model data and a count of
Bhisop methods. In this way we can analyze the stability of the slope quickly, with little risk for the
researchers. Results of laboratory tests obtained results: moisture content (wN), wN1 = 46.55%,
wN2 = 48.60%, wN3 = 50.24%. Specific gravity of soil (Gs) between 2.53 - 2.79, the weight of
saturated soil content between 16.55-16.82 kN / m3, dry matter weight between 10.72-11.72 kN /
m3, the weight of wet soil content between 15.57-16 , 16 kN / m3, Soil liquid limit between 71.50-
75.99%, soil plastic limit between 54.70-56.40%, soil plastic index between 15.37-20.74%. From
Gs testing, weight-volume testing, and atterberg boundary testing, the soil falls into the clay soil
category. And on the clay landslide-shaped model of the arch. The depth of the ir ir terrain ranges
from 0.00 to 0.50 m, the cohesion value (c) between 22.62 - 27.79 kPa, the frictional angle value
between ? 17.03 - 18.050, and the slope of the slope 250 - 340 from the slope stability slope safety
(FK) : on the slope 1 FK = 1.71, on slope 2 FK = 1.52, on the slope 3 FK = 1.27 so that slope 1 is
safe from landslide hazard, slope 2 is not safe against landslide hazard, on slope 3 is not safe
against hazard Avalanche.

Keywords


slope stability analysis; digital elevation models (DEM); geoslope

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