INVESTIGATION OF THE RELATIONSHIP BETWEEN RELIEF COMPONENTS AND NATURAL DISASTERS IN THE LAKE VAN CLOSED BASIN BASED ON GIS (GEOGRAPHIC INFORMATION SYSTEMS)
5 INTERNATIONAL LA K E VAN SOCIAL SCIENCES CONGRESS t h June 1 2-1 4 , 202 6 Van/TÜR K İYE 5 INTERNATIONAL LA K E VAN SOCIAL SCIENCES CONGRESS , Van, Türkiye, 12 - 14 Haziran 2026, ss.114-115, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Van
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.114-115
- Van Yüzüncü Yıl Üniversitesi Adresli: Evet
Özet
Relief characteristics play a fundamental role in determining how natural processes transform into disasters. This study aims to analyze the effects of relief components (elevation, slope, aspect, and slope curvature) on the spatial distribution of natural disasters (avalanches, landslides, rockfalls, floods/overflows) in the Lake Van Closed Basin, where the topographical structure exhibits extreme changes over short distances. As a result of Digital Elevation Model (DEM) and Geographic Information Systems (GIS) based analyses, it has been determined that disaster susceptibility in the basin is concentrated at elevations of 1650-2250 m, slope ranges of 12°-45°, and on concave slopes. It was found that the aspect factor increases the risk of landslides and avalanches particularly on north and northeast-oriented slopes through humidity and snowpack stability; meanwhile, human activities (road construction, etc.) trigger rockfalls by disrupting the equilibrium profile on steep slopes. The most striking finding of the study is that residential areas and transportation networks are clustered at these critical topographical thresholds where geomorphological risks are highest. This situation demonstrates that disaster risk is not merely a result of physical processes, but a product of spatial overlap with human exposure. Consequently, for sustainable and disaster-resilient basin management, settlement projections and extreme events caused by climate change must be integrated into planning processes as strategic parameters. While the current study is relief-oriented, it is recommended that future research be expanded with a multidisciplinary approach encompassing physical elements such as climate, vegetation, and hydrography.