CAJ | 학술논문

针对2011年度汉江秋汛所导致的汉口边滩超常规淤积现象，采用演变分析结合数学模型的手段对其水沙运动规律及产生的原因进行分析，并对其影响及发展变化趋势进行预测。结果表明：汉江入汇使得汉口水道武汉关附近形成一定的缓流区域，遇汉江秋汛加之长江来流量较小，武汉关附近缓流区域范围大幅度增加，使得汉口边滩大幅度淤长。汉口边滩处于主流带与主输沙带自左向右的过渡区域，河道水流特性决定了汉口边滩难以长期稳定，在汉口边滩发生较大幅度的淤积后，一般在秋汛后次年长江汛期会迅速冲刷，因而不会对河道形势及长期演变规律产生影响。
침대2011년도한강추신소도치적한구변탄초상규어적현상，채용연변분석결합수학모형적수단대기수사운동규률급산생적원인진행분석，병대기영향급발전변화추세진행예측。결과표명：한강입회사득한구수도무한관부근형성일정적완류구역，우한강추신가지장강래류량교소，무한관부근완류구역범위대폭도증가，사득한구변탄대폭도어장。한구변탄처우주류대여주수사대자좌향우적과도구역，하도수류특성결정료한구변탄난이장기은정，재한구변탄발생교대폭도적어적후，일반재추신후차년장강신기회신속충쇄，인이불회대하도형세급장기연변규률산생영향。
A supernormal sedimentation occurred at the confluence of the Yangtze River during the autumn flood of Hanjiang River in 2011. In this paper, evolution analysis and numerical simulation on the causes and trend of this supernormal sedimentation were presented. The result shows that, a tranquil flow area exists near Wuhan due to the inflow of Hanjiang River. When the autumn flood of Hanjiang River meets with lesser discharge in the main flow at the same time, the tranquil flow area will rapidly extend and cause supernormal sedimentation at Hankou side bar in confluence area. However, the sedimentation body will be sufficiently eroded for it is located at the left to right transition region of the main flow, therefore, the Hankou side bar will rapidly reduce after the supernormal sed?imentation, and will not exert influences on river regime and further evolution.