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http://dx.doi.org/10.3741/JKWRA.2009.42.4.271

One-dimensional Hydraulic Modeling of Open Channel Flow Using the Riemann Approximate Solver - Application for Natural River  

Kim, Ji-Sung (River and Coast Research Division, Korea Institute of Construction Technology)
Han, Kun-Yeun (Department of Civil Engineering, Kyungpook National University)
Publication Information
Journal of Korea Water Resources Association / v.42, no.4, 2009 , pp. 271-279 More about this Journal
Abstract
The objective of this study is to develop the scheme to apply one-dimensional finite volume method (FVM) to natural river with complex geometry. In the previous study, FVM using the Riemann approximate solver was performed successfully in the various cases of dam-break, flood propagation, etc. with simple and rectangular cross-sections. We introduced the transform the natural into equivalent rectangular cross-sections. As a result of this way, the momentum equation was modified. The accuracy and applicability of newly developed scheme are demonstrated by means of a test example with exact solution, which uses triangular cross-sections. Secondly, this model is applied to natural river with irregular cross-sections and non-uniform lengths between cross-sections. The results shows that the aspect of flood propagation, location and height of hydraulic jump, and numerical solutions of maximum water level are in good agreement with the measured data. Using the developed scheme in this study, existing numerical schemes conducted in simple cross-sections can be directly applied to natural river without complicated numerical treatment.
Keywords
transcritical flow; Riemann solver; natural river; equivalent cross-section; dry-bed;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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