Uncertainty Improvement in a Simulation of Channel Evolution

Kwang Ik Son; Taik Jean Hwang; Man Ha Hwang; Young Ho Yoon

doi:10.4028/www.scientific.net/AMM.212-213.341

Paper Titles

Selection of Groundwater Control Scheme for Deep Excavation in Alluvial Soil along the Yellow River
p.323

Influences of Wind Field on Flow Regime and Algae Blooming in Dianshan Lake
p.327

2-D CFD Model for Free Surface River Flow with Tilt Rigid Leave of Submerged Vegetation
p.332

Laboratory Investigation on Tsunami Wave Runup
p.336

Uncertainty Improvement in a Simulation of Channel Evolution
p.341

High-Resolution Integrated Detection of Underwater Topography and Geomorphology Based on Multibeam Interferometric Echo Sounder
p.345

Study on Dynamic Equilibrium of Sediment Transport by Qingshuigou Course of the Yellow River
p.351

An Analysis on Water-Saving Potential in Central and Northern Part of Ningxia
p.358

Chemistry of Groundwater from Two Aquifers in Liuyi Coal Mine, Northern Anhui Province, China: a Comparative Study
p.362

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 212-213Uncertainty Improvement in a Simulation of Channel...

Uncertainty Improvement in a Simulation of Channel Evolution

Abstract:

The Four Major Rivers Restoration Project (4MRRP), one of the largest river rehabilitation projects in Korea, has being carried out during the last three years. 0.57 billion m3 of sediment was dredged to widen and deepen the channel along four major rivers, the Han, Nakdong, Geum, and Youngsan rivers. As a result of reshaping the natural channel to a trapezoidal channel, and the construction of 16 weirs, the change of longitudinal slope of the river was inevitable. The distribution of bed materials was also changed, due to dredging. Therefore, the rivers were totally disturbed, and the stability of the rivers could not be assured. In particular, the Nakdong river, the second largest river in Korea, has the characteristics of an alluvial channel. Degradation of the main channel bed caused bank erosion, and head-cut phenomena in many tributaries. Deformations of the main channels could be observed all along the river. Long-term simulation of the channel evolution and prediction of the stability of the Nakdong river have to be examined, to cope with the instability of the river, which could lead to unexpected river disasters. This study deals with the methodology of uncertainty improvement, in analysis of the simulation and confirmation with field survey data. Methodology of uncertainty improvement in description of weir, whose discharge coefficient is unknown, in a river was suggested.