| dc.description.abstract | Landslides are the displacement of slope-forming materials such as rocks, soil,
or a combination of these, which often occur in hilly or highland areas and can cause
significant losses and casualties. To minimize these losses and casualties, the
mapping of landslide-prone areas is necessary. The utilization of Geographic
Information System (GIS) technology is an alternative that can be used for mapping
areas that are potentially susceptible to landslides.
Mapping of potential landslide areas was carried out in North Nias Regency
using a predictive model or reference from the Minister of Public Works Regulation
Number 22 of 2007. The regulation states that human activities are one of the
contributing factors to landslides. There are 7 human activity factors that can
contribute to landslides, namely planting patterns, slope excavation and cutting, pond
construction, slope drainage, construction activities, population density, and
mitigation efforts. All of these indicators are assigned scores using the Q-GIS
application, which produces a total score to determine the landslide vulnerability
level.
Based on the analysis results, the landslide vulnerability level in North Nias
Regency is divided into 3 classes: low vulnerability covering an area of 164.57 km²,
including the Lotu and Tuhemberua Districts. Moderate vulnerability covering an
area of 1076.016 km², including the Afulu, Alasa, Alasa Talumozai, Lahewa, Lahewa
Timur, Namohalu Esiwa, Tugala Oyo, Sawo, and Sitolu Ori Districts. High
vulnerability covering an area of 1,554 km², including only a small part of the Sawo
and Lahewa Districts. | en_US |
