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dc.contributor.authorWu, Kuoweien_US
dc.contributor.authorYeh, Keh-Chiaen_US
dc.contributor.authorLai, Yong G.en_US
dc.date.accessioned2019-08-02T02:15:33Z-
dc.date.available2019-08-02T02:15:33Z-
dc.date.issued2019-04-01en_US
dc.identifier.issn2073-4441en_US
dc.identifier.urihttp://dx.doi.org/10.3390/w11040735en_US
dc.identifier.urihttp://hdl.handle.net/11536/152224-
dc.description.abstractA study approach is developed to assess the longitudinal channel slope under the equilibrium condition as well as the transient evolution of a mixed alluvial-soft-bedrock stream. Both the historical field data and 2D mobile-bed numerical modeling are adopted. The proposed approach is applied to a 14 km reach downstream of the Ji-Ji Weir, Chuo-Shui River, Taiwan, where continuous maintenance works have been carried out to stabilize this reach. In this study, the temporal evolution of the longitudinal channel profile is assessed numerically with three spatial scales: The large (the entire study reach), the medium (four sub-reaches), and the local (cross-sections) scale. The large scale analysis is the approach for purely alluvial streams and is shown to be difficult to use to characterize mixed alluvial-bedrock streams. The local scale analysis shows that the soft-bedrock incision has a widely fluctuating slope, reflecting the compound environmental forcing and complex riverbed setting. With the medium scale analysis, the longitudinal channel profile is found to follow a predictive trend if the reach is partitioned into four distinctive sub-reaches. Characteristics of the dynamic channel slope evolution in different spatial scales are computed and presented. The study results can be used to select the proper locations and types of the engineering stabilizing structures in a mixed alluvial and soft bedrock stream.en_US
dc.language.isoen_USen_US
dc.subjectsoft bedrocken_US
dc.subjectSRH-2Den_US
dc.subjecthead-cuttingen_US
dc.subjectmixed transitionen_US
dc.subjectknickpointen_US
dc.subjectspatial scalesen_US
dc.subjectriver morphologyen_US
dc.titleA Combined Field and Numerical Modeling Study to Assess the Longitudinal Channel Slope Evolution in a Mixed Alluvial and Soft Bedrock Streamen_US
dc.typeArticleen_US
dc.identifier.doi10.3390/w11040735en_US
dc.identifier.journalWATERen_US
dc.citation.volume11en_US
dc.citation.issue4en_US
dc.citation.spage0en_US
dc.citation.epage0en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000473105700105en_US
dc.citation.woscount0en_US
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