Channel Geometry Controls Downstream Lags in Sediment Rating Curves
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Dae-Hong | - |
dc.contributor.author | Paik, Kyungrock | - |
dc.date.accessioned | 2021-09-02T12:52:49Z | - |
dc.date.available | 2021-09-02T12:52:49Z | - |
dc.date.created | 2021-06-16 | - |
dc.date.issued | 2018-04 | - |
dc.identifier.issn | 0733-9429 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/76238 | - |
dc.description.abstract | In transport-limited alluvial streams, the suspended sediment concentration C exhibits power functional relationships with the flow discharge Q at a given station. Once the power-law C-Q relationships at multiple stations along a stream are compiled, these relationships either systematically lag in the downstream direction (i.e.,decreasing C downstream for a constant Q) or overlap each other (i.e.,similar C for a constant Q anywhere along the stream). It has been claimed that the mode of downstream C-Q (lag or overlap) is associated with the downstream channel geometry. This poses a fundamental question as to whether different modes of downstream C-Q relationships are the mechanistic consequences of channel hydraulics functions induced by different channel geometries or distinct channel geometries are the signatures of adaptation to the varying C-Q relationships. This question is investigated in this study with theoretical streams by applying a numerical model which solves sediment flux and shallow water equations simultaneously. Simulation results are consistent with observations from natural rivers in many respects, such as power-law at-a-station and downstream hydraulic geometry relationships. Lagged C-Q relationships are reproduced whereas the degree of a lag depends on the imposed channel geometry. This agrees with field observations and can be explained through the downstream increase rate in the bed shear stress. These findings imply that the downstream lag in C-Q relationships is the resultant feature of a given channel geometry. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ASCE-AMER SOC CIVIL ENGINEERS | - |
dc.subject | DAM-BREAK FLOW | - |
dc.subject | HYDRAULIC GEOMETRY | - |
dc.subject | DISCHARGE | - |
dc.subject | STREAMS | - |
dc.subject | BED | - |
dc.subject | MAGNITUDE | - |
dc.subject | TRANSPORT | - |
dc.subject | SCHEMES | - |
dc.subject | LOADS | - |
dc.title | Channel Geometry Controls Downstream Lags in Sediment Rating Curves | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Paik, Kyungrock | - |
dc.identifier.doi | 10.1061/(ASCE)HY.1943-7900.0001418 | - |
dc.identifier.scopusid | 2-s2.0-85041367560 | - |
dc.identifier.wosid | 000425618400008 | - |
dc.identifier.bibliographicCitation | JOURNAL OF HYDRAULIC ENGINEERING, v.144, no.4 | - |
dc.relation.isPartOf | JOURNAL OF HYDRAULIC ENGINEERING | - |
dc.citation.title | JOURNAL OF HYDRAULIC ENGINEERING | - |
dc.citation.volume | 144 | - |
dc.citation.number | 4 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Water Resources | - |
dc.relation.journalWebOfScienceCategory | Engineering, Civil | - |
dc.relation.journalWebOfScienceCategory | Engineering, Mechanical | - |
dc.relation.journalWebOfScienceCategory | Water Resources | - |
dc.subject.keywordPlus | DAM-BREAK FLOW | - |
dc.subject.keywordPlus | HYDRAULIC GEOMETRY | - |
dc.subject.keywordPlus | DISCHARGE | - |
dc.subject.keywordPlus | STREAMS | - |
dc.subject.keywordPlus | BED | - |
dc.subject.keywordPlus | MAGNITUDE | - |
dc.subject.keywordPlus | TRANSPORT | - |
dc.subject.keywordPlus | SCHEMES | - |
dc.subject.keywordPlus | LOADS | - |
dc.subject.keywordAuthor | Hydraulic geometry | - |
dc.subject.keywordAuthor | River training | - |
dc.subject.keywordAuthor | Sediment rating curve | - |
dc.subject.keywordAuthor | Channel geometry | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.