Moreover, attentions must be paid to the tributary with slight slope bed, because the water flowing into the tributary from the main channel during the uprising period of main channel flood may cause large-scale inundate in the tributary basin.

• 研究结果表明：在干支流交汇口，干流流量变化速率越大，支流倒灌流量越大；干流洪水陡涨时灌入支流的巨大水量对底坡平缓支流可能造成的淹没危害应引起充分重视。