Abstract
본 연구에서는 완경사 하천에 유입하는 지류 하구부 하도폐색현상을 규명하기 위하여 본류하도로 유입하는 합류각이 <TEX>$30^{\circ}$</TEX>, <TEX>$45^{\circ}$</TEX>, <TEX>$60^{\circ}$</TEX>, <TEX>$75^{\circ}$</TEX> 형태의 가상하도 합류부의 구조를 설정한 후, 수제의 길이가 본류하도 하폭의 4%, 6%, 8%, 10%에 해당하는 도류제에 대해서 각각의 수리학적 특성을 SMS의 RMA-2와 SED2D 모형을 이용하여 수치해석을 실시하였다. 수치해석 결과에서 설정된 적정 도류제를 낙동강 본류에 유입하는 합류각이 큰 감천 합류부와 합류각이 작은 위천 합류부에 적용하여 유속, 수위, 하상변동 등 수리학적 특성 분석을 통한 하구폐색저감을 위한 도류제 제원을 제시하였다. In this study, virtual confluence of <TEX>$30^{\circ}$</TEX>, <TEX>$45^{\circ}$</TEX>, <TEX>$60^{\circ}$</TEX>, <TEX>$75^{\circ}$</TEX> type flowing into main channel was designed to comprehend occlusion phenomenon of the mouth of river, then performed numerical analysis using the RMA-2 and SED2D model of SMS according to application of 40m, 60m, 80m, 100m Training levee corresponding to main channel width ratio. Results of simulations analysis are summarized as follows. Applying appropriate Training levee length determined by numerical analysis results, Training levee dimension for occlusion reduction was studied through the analysis of velocity, water level, bed variation at the Gamchen confluence and Wichen confluence.
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