现状边界条件黄河下游“96·8”型洪水计算研究

摘要

采用数学模型计算的方法，研究分析现状边界条件下黄河下游“96·8”型洪水演进过程，结果表明：“96·8”型洪水演进的整体表现好于当年，洪水传播时间明显缩短，水位有所降低。洪水演进过程中，夹河滩—高村河段漫滩严重，削峰较大，滩区蓄滞水量及死水量相对历史实测数据明显增大；山东河段约89％的滩区漫水形成死水区，未回归主槽，属于小水大淹没，是重点防控河段。片林等复杂边界条件对洪水传播的过程影响明显，主要表现为洪水水位抬升、滩区蓄滞水量增大、洪峰削峰率增大、洪水传播时间延长。%Using the methods of mathematics model computation,the characteristics of "August 1996" type flood routing process of the lower Yellow River is researched. The research results show that,under the current boundary condition,the"August 1996" type flood routing is better than the same year,the flood travel time is shortened obviously and the water level is decreased. During the process of flood routing,Jiahetan-Gaocun channel is over-flooded seriously,flood peak discharge is clipped greatly and the floodwater storage of floodplain is big;89% of Shandong floodplain forms backwater zone,the floodwater cannot regress to the main channel,it should be defended importantly. Woods affect the flood rou-ting process,mainly showing on the increase of floodwater level,the increase of floodwater storage of floodplain,the increase of clipping rate and prolonged the flood travel time.