CAJ | 학술논문

本文分析了三门峡水库渭河下游实测资料，认为前期淤积使潼关河段同流量流速降低，使渭河下游主槽过洪能力减小、洪水流速降低。而洪水是维持潼关及渭河下游动态冲淤平衡的动力，因此前期淤积是造成渭河下游淤积上延严重的根本原因。流速降低破坏了渭河干流推移质和支流推移质进入渭河后的输沙平衡，这也是渭河下游淤积上延严重的原因之一。
본문분석료삼문협수고위하하유실측자료，인위전기어적사동관하단동류량류속강저，사위하하유주조과홍능력감소、홍수류속강저。이홍수시유지동관급위하하유동태충어평형적동력，인차전기어적시조성위하하유어적상연엄중적근본원인。류속강저파배료위하간류추이질화지류추이질진입위하후적수사평형，저야시위하하유어적상연엄중적원인지일。
Based the theoretical foundations of fluvial process, the mechanism of backwater deposits extended upstream of Sanmenxia Reservoir in Weihe River has been analyzed. Sedimentation in forward period decreased the Tongguan reach flow velocity with the same discharge, decreased the main channel width and the flood conveying capacity in lower Weihe River. So that the power for keep the fluvial equilibrium has been decreased. It is the fundamental reason that created the backwater deposits extended upstream and serious sedimentation in channel occurred. The bed load of branch stream into the Weihe River increased the backwater deposits extended upstream.