Sediment Deposit of Merapi Mount Eruption

Abstract

The eruption of Mount Merapi at the end of 2010 has completely changed the landscape in the affected areas, namely at the foot of the mountain to the south and west. The potential deposit of material that has been spewed out at the time of the eruption is estimated at around 140 million m3, this is a fairly large volume compared to several previous eruptions. From this analysis, three lines are obtained that describe the elevation of the riverbed for both the longitudinal and transverse sections. The addition of sediment deposits mostly occurs in the upstream area and is estimated to come from rain lava floods. This study provides an overview of the condition and position of the riverbed elevation, both longitudinal and transverse in the Gendol, Kuning and Boyong rivers and the volume in each cross section. Normalization of the river is needed to provide space for the river channel, so that if there is a flood, the lava rain can be filled again and not endanger the surrounding area.