Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.rse.2010.03.016
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dc.titleThe 2006 pyroclastic deposits of Merapi Volcano, Java, Indonesia: High-spatial resolution IKONOS images and complementary ground based observations
dc.contributor.authorThouret, J.-C.
dc.contributor.authorGupta, A.
dc.contributor.authorLube, G.
dc.contributor.authorLiew, S.C.
dc.contributor.authorCronin, S.J.
dc.contributor.authorSurono
dc.date.accessioned2014-11-28T07:57:24Z
dc.date.available2014-11-28T07:57:24Z
dc.date.issued2010-09
dc.identifier.citationThouret, J.-C., Gupta, A., Lube, G., Liew, S.C., Cronin, S.J., Surono (2010-09). The 2006 pyroclastic deposits of Merapi Volcano, Java, Indonesia: High-spatial resolution IKONOS images and complementary ground based observations. Remote Sensing of Environment 114 (9) : 1949-1967. ScholarBank@NUS Repository. https://doi.org/10.1016/j.rse.2010.03.016
dc.identifier.issn00344257
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/112840
dc.description.abstractOn 16 June 2006 an overpass of IKONOS coincided with the emplacement of an active block-and-ash flow fed by a lava dome collapse at Merapi Volcano (Java, Indonesia). It was the first moving pyroclastic flow recorded on a satellite image. The very high-spatial resolution of the image indicated the extent and impact of pyroclastic material that was deposited during and prior to the day of image acquisition. A number of features associated with the hazardous block-and-ash flows emplaced in narrow, deep gorges were mapped, interpreted and analysed. The high-spatial-resolution IKONOS imagery worked extremely well for identifying pyroclastic deposits.The block-and-ash flow and surge deposits recognized in the IKONOS images include: (1) several channel-confined flow lobes and tongues in the box-shaped gorge; (2) thin ash-cloud surge deposit and knocked-down trees in constricted areas on both slopes of the gorge; (3) fan-like overbank deposits on the Gendol-Tlogo interfluves from which flows were re-routed in the Tlogo minor valley; (4) massive overbank flow lobes on the right bank of the Gendol River, which destroyed the village of Kaliadem 0.5. km from the main channel. A small part of this flow was re-channelled into the Opak tributary valley.The high-resolution IKONOS images also helped us to identify geomorphic obstacles that enabled flows to ramp up and spill out from the sinuous channel, as flow avulsion. Flow avulsions are dangerous as the redirect flows to unexpected areas away from the main channel. Valley fills from previous deposits, channel bends, and anthropogenic barriers in the channel (locally known as Sabo dams) influence the down valley passage of the flows. Sabo dams, originally built to ameliorate the effect of high sediment load streams, caused block-and-ash flows to avulse of the containing channel, and devastate populated areas. © 2010 Elsevier Inc.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.rse.2010.03.016
dc.sourceScopus
dc.subject2006 eruption
dc.subjectBlock-and-ash flow deposits
dc.subjectFlow avulsion
dc.subjectHazard mapping
dc.subjectIKONOS images
dc.subjectMerapi Volcano
dc.subjectSabo dam
dc.typeArticle
dc.contributor.departmentCTR FOR REM IMAGING,SENSING & PROCESSING
dc.description.doi10.1016/j.rse.2010.03.016
dc.description.sourcetitleRemote Sensing of Environment
dc.description.volume114
dc.description.issue9
dc.description.page1949-1967
dc.description.codenRSEEA
dc.identifier.isiut000279495200007
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