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Hydraulic Analysis Using a Two-Dimensional Model(II) : Bridge Backwater Analysis
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 Title & Authors
Hydraulic Analysis Using a Two-Dimensional Model(II) : Bridge Backwater Analysis
Kim, Eung-seok; Lee, Seung-hyun;
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This study has analyzed the backwater effect by the bridge pier on the basis of the result on hydraulic characteristics with pier shapes in study(I), using a two-dimensional model(RMA-2) and an one-dimensional model(HEC-RAS). The pier shapes are classified into total six types such as square, rhombus, octagon, oval, round, and no-piers. The result of the backwater effect analysis showed that the backwater length is about 150 and 50m from HEC-RAS and RMA-2, respectively for all pier types. Although it is difficult to directly compare between results from the two models, the oval shape pier has shown similar results to the no-pier situation before the bridge construction in hydraulic characteristics. This analysis can help to select pier types in the new bridge construction for the future.
Piers shape;Backwater Impact section;
 Cited by
Cha, Y.K., Kim, Y.H., Lee, M.S., Analysis of Water Surface Level Variation due to Piers in a Curved Channel, Journal of the New Material Technology, Vol.9, pp.41-53.2000.

Kim, Y.H., Computation of Backwater due to Piers in Bend of Mobile Bed Channels, Kyung Bok College, Vol.4, pp.579-600.2000.

Koh, S.H., Yoon, B.M., Yu, K.K. Evaluation of Water-Surface Rising due to Bridge Piers by using RMA-2 Model, Korean Society of Civil Engineers, Vol. 2005, No. 10, pp.238-241.2005.

Kim, C.h., Yoon, B.m., Yu, K.k. An Experimental Study on the Backwater Effect due to Bridge Piers, 2006 Korean Society of Civil Engineers, Vol. 2006, No. 10, pp.2654-2657.2006.

Shin, K.S., Jeong, S.M., Lee, J.H., Song, P. Flow Characteristics and Riverbed Changes Simulation for the Upstream and Downstream Sections of Gongju Bridge, Korean Society of Hazard Mitigation, Vol. 8, No. 2, pp.119-127.2008.

USACE-HEC, Hydrologic Modeling HEC-RAS User's Manual, 2006.

Kim, Y.H., Influent of Flood Stage by Dragon Teeth Constructed in Rivers, Kyung Bok College, pp.155-174.2001