CAJ | 학술논문

山洪常常携带大量泥沙进入山区河道,运动的泥沙从水流中吸收能量,增大了水流阻力从而使水位额外升高.本文通过大比降水槽试验模拟该现象,试验结果表明泥沙进入河流后因颗粒间的碰撞、运动吸收能量导致阻力增大,水深增加;水深受携带泥沙粒径、输沙率、床面形态、底坡与水流的影响.最后分析以上的各因素对水流阻力的变化规律,推导出泥沙进入河道情况下山区大比降河流水深的变化,建立起水流挟沙后水深变化的经验表达式.
산홍상상휴대대량니사진입산구하도,운동적니사종수류중흡수능량,증대료수류조력종이사수위액외승고.본문통과대비강수조시험모의해현상,시험결과표명니사진입하류후인과립간적팽당、운동흡수능량도치조력증대,수심증가;수심수휴대니사립경、수사솔、상면형태、저파여수류적영향.최후분석이상적각인소대수류조력적변화규률,추도출니사진입하도정황하산구대비강하류수심적변화,건립기수류협사후수심변화적경험표체식.
Sediments are carried into mountain streams by catastrophic floods. Due to energy consumption of moving sediments,the flow resistance is increased and,therefore,the water depth is increased. This pa?per aims to study the influence of bedload movement on water depth in steep mountain rivers. An empiri?cal formula was proposed. This equation may be used to predict the water depth and support the planning of prevention and mitigation of mountain torrents.