Landslide Zonation at the Budong-Budong Watershed, Central Mamuju District of West Sulawesi Province

Abstract

The objectives of this study are as follows: first, to investigate the contributing parameters induced land sliding in the Budong-Budong watershed, and second, to construct landslide susceptibility zonation map. In this study, the analytical hierarchy process (AHP) based on Geographical Information System (GIS) methods was used to produce map of landslide susceptibility. In this study area, more than 50% of total area were classified high (H) to very high (VH) susceptibility landslide zone. Mean while, 12% of total area were classified as moderate (M) and remaining were classified as low (L) to very low (VL) susceptibility landslide zone. Almost area of Budong-Budong Wetershed were classified as VH and H susceptibility landslide zone underlying by Talaya (Tmtv), Lamasi (Toml) and Latimojong (Kls) Formation on the steep slope land.

Identification of Soil, Rock and Tecto-Volcanism on Landslides in Tondano Watershed

“…Therefore, the mapping of areas prone to landslides as carried out by Refs. [2][3][4], entailed the parameters of lithology as the most important part in the study of landslides, since diverse units of lithology have different degrees of vulnerability to landslides [5][6][7][8][9][10]. Lithology has been accepted massively and significantly for the effect on the landslides.…”

“…Several researches have conducted study on landslide and acknowledged that the parameters of slope and lithology are the main factors of landslides [10,11] while the main triggers are rainfall and earthquakes. However, study on the mineral content of rocks and soil as one determinant of the rock physical property on landslide vulnerability is very rare.…”