CAJ | 학술논문

通过实测资料系统分析了长江中游调关水道演变特点，重点对三峡蓄水后调关水道演变规律进行了分析，并研究了调关水道未来演变趋势。结果表明，调关水道河床由中细沙组成，河岸为粘性土和沙组成的二元相结构，河段自然属性较强，历史上河床在自然条件下主要表现为凹岸崩坍、凸岸淤长，弯顶缓慢下移。三峡工程运行后，来沙减少，枯水流量增加等因素影响，原淤积性凸岸发生冲刷，河道总体流速降低，且弯道进口区域由于凸岸冲刷，水流趋直，弯道环流作用减弱，导致了凹岸淤积。随着三峡蓄水后来沙持续减少，弯道段凸冲凹淤的趋势将会持续。
통과실측자료계통분석료장강중유조관수도연변특점，중점대삼협축수후조관수도연변규률진행료분석，병연구료조관수도미래연변추세。결과표명，조관수도하상유중세사조성，하안위점성토화사조성적이원상결구，하단자연속성교강，역사상하상재자연조건하주요표현위요안붕담、철안어장，만정완만하이。삼협공정운행후，래사감소，고수류량증가등인소영향，원어적성철안발생충쇄，하도총체류속강저，차만도진구구역유우철안충쇄，수류추직，만도배류작용감약，도치료요안어적。수착삼협축수후래사지속감소，만도단철충요어적추세장회지속。
Through the measured data, the Tiaoguan waterway evolution characteristics, especially that after the Three Gorges reservoir impoundment, were analyzed. The future Tiaoguan waterway evolution trend had been re?searched. The results show that, Tiaoguan waterway bed is composited by middle and fine sediment. The river bank is composited by cohesive soil and sand. All these have made the river exist with a strong river natural property. In natural state, the river evolution characteristics are shown as convex bank collapsing, concave bank sedimentation and the top of curved reach moving down gradually, with the effects of revetment and rocky node. After the Three Gorges reservoir impoundment, the income sand reduced gradually and the low period discharge increased gradual?ly. As the scouring of convex bank, the flow rate decreased overall, flow lines turn straight and bend circulation de?creased. These made concave bank deposit. As the income sediment continuing decreased, convex bank collapsing and concave bank sedimentation evolution tend in curve reach would be continued.