黄河兰州段河工模型及洪水预测

基于1981-2001年水文数据,分析了黄河兰州段河床演变规律;通过动床河工模型试验研究,提出了黄河兰州段泄洪宽度300m的河道整治方案,得到了设计流量为5600m3/s,6500m3/s,7920m3/s,8350m3/s下的相应水位和水面线。在此基础上预测:1)黄河兰州段发生大洪水的可能性仍然存在;2)兰州河段泥沙淤积有加重的趋势。

River engineering model and flood prediction at Lanzhou section of the Yellow River

On the basis of the hydrologic data from 1981 to 2001, the evolution of river bed at Lanzhou section of the Yellow River was analyzed. A river-dredging plan with 300 m of river width was put forwarded by studying the river engineering model experiments. The flood level and water surface profile in different design flood (5 600 m3/s, 6 500 m3/s, 7 920 m3/s, 8 350 m3/s) were gotten with this design. The flood prediction was also proposed.