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http://dx.doi.org/10.9798/KOSHAM.2011.11.3.117

Numerical Analysis of Riverbed Changes at the Downstream of the Ji-Cheon  

Choi, Ho (농림수산식품부 인천어항사무소)
Rim, Chang-Soo (경기대학교 토목공학과)
Jung, Jae-Wook (한국방재기술센터)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.11, no.3, 2011 , pp. 117-125 More about this Journal
Abstract
River bed variation drops storage capacity of dams and reservoirs, and furthermore deteriorates safety of banks and peers. Therefore, understanding of bed variation is important to use and manage river water. Study section is downstream part of Ji- Cheon nearby Ji-Cheon Bridge which is located in Gum river basin. The river surveying at fourteen places with the length of 1,320m were undertaken on November 7, 2003 and September 24, 2004, and the results of river surveying were analyzed for the study. Real bed variation was compared with the simulation results of HEC-6 and GSTARS 3.0. Cross section data for the simulation of HEC-6 and GSTARS3.0 were composed of the basis of river surveying data on November 7, 2003. Hydrological data were acquired from Gu-Ryong watermark located at Ji-Chun Bridge. The research results revealed that when using Toffaleti equation, simulation results of two models were similar to the real bed variation. The bed variation simulated by using GSRARS 3.0 with only one stream tube was similar to the real bed variation. The bed variation simulated by using two models(HEC-6 and GSTRARS 3.0) with Toffaleti equation was also similar to the real bed variation. Therefore, it is expected that HEC-6 and GSTARS 3.0 models have applicability to predict the bed variation at the downstream of Ji-Cheon.
Keywords
HEC-6; GSTARS; Ji-Cheon; River bed variation;
Citations & Related Records
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