Improving river stage forecast by bed reconstruction in sinuous bends

Yan Ting Lin, Jen Yu Han, Wei Bo Chen, Yuan Fong Su, Jiun Huei Jang

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

Bed topography in river bends is highly non-uniform as a result of the spiral motion of fluid and sediment transports related to channel curvature. To grasp a full understanding of geomorphology and hydrology in natural river bends, detailed bed topography data are necessary, but are usually not of high enough quality and so require further interpolation for sophisticated studies. In this paper, an algorithm is proposed that is particularly suited to bathymetry interpolation in rivers with apparent bends. The thalweg and the two banks are used as geographical features to ensure that a concave cross-sectional bed-form can be found in bend geometry, while linear interpolations are conducted in the in accordance with secondary and main stream currents, respectively. In comparison with conventional spatial interpolation methods, the proposed algorithm is validated to ensure better performance in generating smooth and accurate bed topography in channel bends, which results in better predictions of river stage by 2D hydrodynamic simulation in practical field tests.

原文English
頁(從 - 到)960-974
頁數15
期刊Journal of Hydroinformatics
20
發行號4
DOIs
出版狀態Published - 2018 7月

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 水科學與技術
  • 岩土工程與工程地質
  • 大氣科學

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