长江南津关位于葛洲坝枢纽上游2.3公里。自南津关以上1公里半的母猪咀至南津关以下600米的坝上17#断面约2公里范围,称为南津关河段。该河段河床形态十分复杂,急弯、扩宽、倒坡以及岸壁挑流等引起水流急变的因素,集中发生在这2公里的范围内。因此,水流十分紊乱,剪刀水、泡、旋、回流等大尺度紊动丛生。南津关河段紧接葛洲坝枢纽大江、三江两条引航道的上口门,是坝区航道的咽喉。因此,研究本河段的水流特性及泡旋成因,对 The south of Yangtze River is located 2.3 kilometers upstream of Gezhouba Dam. Nanjiguan 1 km above the half-sow Tsui Tsui to Nanjin Guan 600 meters below the dam on the 17 # section of about 2 km range, known as the Nanjin River. The shape of riverbed in this section is very complicated. Factors such as sharp bends, widening, downslope and bank-wall pick-up cause sudden changes in water flow, which occur in a range of 2 km. Therefore, the water flow is very disorder, scissors water, bubble, spin, reflux and other large-scale turbulence clusters. Nanjin Guan River Gezhouba dam immediately after the Grand River, Sanjiang two leading access to the waterway, the dam is the channel lanes. Therefore, studying the current characteristics of this section of the river and the cause of the bubble, right