Landslide Hazard Zonation Mapping of Bonga Town Using Statistical Information Value Model Techniques, Southwestern Ethiopia
| dc.contributor.advisor | Trufat Haile | |
| dc.contributor.author | Tatek Tadesse | |
| dc.date.accessioned | 2025-08-31T20:20:23Z | |
| dc.date.available | 2025-08-31T20:20:23Z | |
| dc.date.issued | 2024-03 | |
| dc.description.abstract | A landslide is the downward and outward movement of slope-forming material consisting of rock, soil, and artificial fill. In the present study, landslide hazard zonation was carried out in Bonga town in southwest Ethiopia, 449 km from Addis Ababa, the capital city of Ethiopia. The main objective of this study was to prepare landslide hazard zonation based on an information value statistical approach. In the case of landslide hazard zonation map carried out by taking into account the nature and distribution of landslides occurring in the Bonga town. Furthermore, the possible relationship between the landslides and the associated causal factors such as slope, aspect, lithology, land use and land cover, drainage density, and relative relief will be considered in this method. The data for above mentioned have been collected and rating value by using information value statistical approaches for each causative parameters to define the elements of the landslide hazard zonation map. The sum combination of all parameters of the weighted layers into a single map and the classification of the scores of this map into landslide hazard zonation and also verifications were based on the field mapped data identifying the existing landslide and overlaid with the prepared landslide hazard zonation map. The result landslide susceptibility index map has been classified into three landslide hazard zonation classes The results of the landslide hazard zonation map of the present study area through information value methods show classified into three hazard classes 3.64 km2 (27%) of the area belongs to the low hazard class, 5.9 km2 (43%) of the area belongs to the moderate hazard class and 4.2 km2 (30%) of the area belongs to the high hazard class. Whereas, the landslide hazard zonation map of the study area verified based on information value methods, out of seven(7) existing landslides inventory and the result indicated that (71%) of the five past landslides were within the moderate zone of the prepared landslide hazard zonation map. (21%) of the two past landslides occur in high-hazard areas, which have a high hazard class. The remaining (8%) past landslides are of low hazard and have a practical possibility of landslide occurrence. Thus, in general, it can be said that about 96% of the past landslides have been validated by the landslide hazard zonation map, which shows a satisfactory agreement on the rationality of the considered parameters and the adopted bivariate statistical value model technique. | |
| dc.identifier.uri | https://etd.aau.edu.et/handle/123456789/7198 | |
| dc.language.iso | en_US | |
| dc.publisher | Addis Ababa University | |
| dc.subject | Landslide Hazard | |
| dc.subject | Zonation Mapping | |
| dc.subject | Bonga Town Using Statistical Information | |
| dc.subject | Value Model Techniques | |
| dc.subject | Southwestern Ethiopia | |
| dc.title | Landslide Hazard Zonation Mapping of Bonga Town Using Statistical Information Value Model Techniques, Southwestern Ethiopia | |
| dc.type | Thesis |