Abstrack:
5 days after Kelud Volcano eruption 2014 in 13 February 2014, lahar was occurs in several river in slope of Kelud Volcano. Rainfall with intensity 40 mm/hour mobilized pyroclastic material from upper part of Kelud Volcano to the channel during 3,5 hour. The aims of this paper are (1) to study of geomorphic impact of lahar related with damage and (2) to study future risk due to the potential of lahar source material and lahar repose. We use merged data from primary data as well as secondary. Geomorphology impact of lahar was identified using integration of remote sensing, GIS approach, and fieldwork checking. Interviews as well statistically data from villages were used in order to determine their perception to the risk of lahar. Morphogenic processes such as riverbank erosion, channel widening and riverbed down cutting takes an important role in generating the impact of lahar in Kali Konto. Lahar in medial and distal area was affected more largely than lahar in proximal area. This impacted in river widening and buried crop field inside of the channel. People along this river must be prepared due to huge potential of lahar and their vulnerability.
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