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dc.contributor.authorHuang, Ming-Wanen_US
dc.contributor.authorPan, Yii-Wenen_US
dc.contributor.authorLiao, Jyh-Jongen_US
dc.date.accessioned2014-12-08T15:29:54Z-
dc.date.available2014-12-08T15:29:54Z-
dc.date.issued2013-02-15en_US
dc.identifier.issn0169-555Xen_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.geomorph.2012.11.022en_US
dc.identifier.urihttp://hdl.handle.net/11536/21434-
dc.description.abstractDuring the 1999 Chi-Chi earthquake (M-w = 7.6) in Taiwan, the coseismic displacement induced fault scarps and a pop-up structure in the Taan River. The fault scarps across the river experienced maximum vertical slip of 10 m, which disturbed the dynamic equilibrium of the fluvial system. As a result, rapid incision in the weak bedrock, with a maximum depth of 20 m, was activated within a decade after its armor layer was removed. This case provides an excellent opportunity for closely tracking and recording the progressive evolution of river morphology that is subjected to coseismic uplift. Based on multistaged orthophotographs and digital elevation model (DEM) data, the process of morphology evolution in the uplift reach was divided into four consecutive stages. Plucking is the dominant mechanism of bedrock erosion associated with channel incision and knickpoint migration. The astonishingly high rate of knickpoint retreat (KPR), as rapid as a few hundred meters per year, may be responsible for the rapid incision in the main channel. The reasons for the high rate of KPR are discussed in depth. The total length of the river affected by the coseismic uplift is 5 km: 1 km in the uplift reach and 4 km in the downstream reach. The downstream reach was affected by a reduction in sediment supply and increase in stream power. The KPR cut through the uplift reach within roughly a decade; further significant flooding in the future will mainly cause widening instead of deepening of the channel. (C) 2012 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectCoseismic upliften_US
dc.subjectIncision rateen_US
dc.subjectTaan Riveren_US
dc.subjectChi-Chi earthquakeen_US
dc.subjectTaiwanen_US
dc.titleA case of rapid rock riverbed incision in a coseismic uplift reach and its implicationsen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.geomorph.2012.11.022en_US
dc.identifier.journalGEOMORPHOLOGYen_US
dc.citation.volume184en_US
dc.citation.issueen_US
dc.citation.spage98en_US
dc.citation.epage110en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000315610200008-
dc.citation.woscount4-
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