Experiment study on sediment control function of river narrow-section

C. H. Lin, C. L. Shieh, C. J. Liu, S. H. Lin, Y. J. Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This study conducts a flume experiment to explore the hydraulic and sediment control function in the narrow-section of a river. The laboratory experiment is expected to show how a river’s narrow section retains and drainages sediment when there is a large scale flood event.A narrow-section scale model was set up for the flume experiments, with parameters including contraction ratio, contraction length, and sediment supply concentration. The data analysis in sediment deposition processes upstream of river narrow section, sediment reduction rate, and sediment trapping rate allows to understand the role of a river’s narrow section in regulating the amount of sediment. The results show that (1) the contraction ratio is more effective in sediment control than any other parameter; (2) under large sediment supply cases, the sediment trapping efficiency increases with the contraction ratio; (3) dimensionless sediment concentration decreases with the contraction ratio. Moreover, under different sediment supply cases, high-intensity and short-duration sediment supply improves the sediment trapping efficiency. The results confirm that the river narrow section of a river has the capacity to trap sediment and reduce sediment discharge when a large scale flood event occurs.

Original languageEnglish
Title of host publicationRiver Sedimentation - Proceedings of the 13th International Symposium on River Sedimentation, ISRS 2016
EditorsSilke Wieprecht, Stefan Haun, Karolin Weber, Markus Noack, Kristina Terheiden
PublisherCRC Press/Balkema
Pages668-673
Number of pages6
ISBN (Print)9781138029453
Publication statusPublished - 2017 Jan 1
Event13th International Symposium on River Sedimentation, ISRS 2016 - Stuttgart, Germany
Duration: 2016 Sep 192016 Sep 22

Publication series

NameRiver Sedimentation - Proceedings of the 13th International Symposium on River Sedimentation, ISRS 2016

Other

Other13th International Symposium on River Sedimentation, ISRS 2016
CountryGermany
CityStuttgart
Period16-09-1916-09-22

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)

Fingerprint Dive into the research topics of 'Experiment study on sediment control function of river narrow-section'. Together they form a unique fingerprint.

Cite this