TRANSITION ISSUES: A number of breaches in New Orleans occurred where an earthen levee met a concrete flood wall and rising water scoured the joint and pushed through.

• 材料变换：纽奥良有些堤防裂口发生于土造海堤和混凝土防洪堤交会处，上涨的洪水冲坏堤防连接处，从这里突破防线。