近10年长江镇扬河段世业洲汊道演变研究

Research on Evolution of Shiye Island Channel in Zhenyang Reach of Yangtze River in Recent 10 Years

通过对长江镇扬河段世业洲汊道近10年来0 m高程线以下的固定断面面积、0 m线宽、最大深度、平均深度、分流比及平均流速等6个数据参数的研究分析,揭示了汊道在此期间的演变过程,并得出相关结论:世业洲右汊道仍处于主航道地位,但整体河面在加宽,平均深度在变浅,河床呈较明显地淤积趋势;左汊道处于次航道地位,各项参数的数据表明左汊道有变窄加深趋势,尤其汊道下段变化更为明显,冲刷严重。

Based on the analysis of fixed sections under 0 m elevation line,0 m line width,the maximum depth and average depth,diversion ratio and average velocity etc.6 data parameters at Shiye island channel in Zhenyang reach of Yangtze River,had been revealed the evolution process in the period,the result showed that the right channel was dominate,in the whole stream of which there was widened and deepen,a more apparent siltation at the same time; that the left channel was still minor,the indicators illustrated the width of which was narrowing,the depth of which became deeper,in particular,more obvious in the downstream.