Correlation between Tectonic Environment and Chracteristics of Mass Movement (Landslides): A Case Study from Java, Indonesia

Publication Date : 2016-02-02
Author : Kusumayudha, S. B.Ciptahening, A. N.
Countries : Indonesia
Disaster Management Theme :
Disaster Type : Landslide
Document Type : Research Paper
Languange : en
Link :

Abstact :

n Central Java and Yogyakarta Special Region, there are several zones, which potential of landslide disaster. The zones are in general located at uplifted and or folded mountains, such as North Serayu Mountains, South Serayu Mountains, Menoreh Mountains, Southern Mountains and slopes of young volcanic area, including Ungaran-Merbabu-Merapi area, and Slamet-Sundoro-Sumbing area. Besides morphology, another main factor influencing vulnerability of the terrain is physical properties of the composing lithology. The geologic formations in the study area are predominantly composed of clayey and volcanic rocks. The cohesion force of clayey rock ranges 0.4-0.7 kg/cm2, the internal friction angle ranges 20o-35o, while the cohesion force of volcanic rock (weathered) ranges 0.25-0.27 kg/cm2, and the friction angle ranges 20o-35o. In general, rocks occupying the area are collectively dissected by joints and active faults, with soil of more than 5 m thick. Local rainfall belongs to high category (> 2,500 mm/y). However, landslides that occur in each physiographic zone mentioned above show different characterizations