STUDI GEOMORFOLOGI DAN ANALISIS BAHAYA LONGSOR DI KABUPATEN AGAM, SUMATERA BARAT

Lusy Fransiska, Boedi Tjahjono, Komarsa Gandasasmita

Abstract


Sumatra island is located at conjunction point of Indo-Australia Plate and Eurasia Plate which move continuesly throughout year. This movement provokes many natural disasters and one is landslide. This research aims: 1) to learn geophology condition of Agam District, and 2) to map landslie vulnerable and hazard area at Agam District. The methods used are (1) using SRTM to understand and map of geomorphology area, and (2) multicritera evaluation using weight and score system. The research results show that geomorphology of Agam Districr is very complex. The western area is coastal plain area, the eastern are is hilly and mountanoues area, at its located at Bukit Barisan Mountain Rigdes. The vulnerability data show that 54,3% areas belong to no vulnerabity status, 14,9% low vulnerability, 12,2% medium vulnerability, and 18,6% high vulnerability. Landslide hazard data shows that 51,3% belongs to no hazard, 14,9% low hazard, 20,2% medium hazard, and 13,6% high hazard. Category of medium and high of landslide hazard and risk distribute ar mountainous area which hase slope between 15% - > 40%.


Keywords: Agam District, geomorphology, GIS, hazard, landslide, vulnerability


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