小浪底水库拦沙运用期大洪水对温孟滩移民安置区河段影响的试验研究

小浪底水库移民安置区温孟滩河段河道整治模型试验研究结果表明，在水库拦沙运用期冲刷严重的初始河道地形条件下遭遇大洪水后，河势变化不大，河道整治工程对大洪水是基本适应的，但存在个别工程入流过死，局部冲深大和送溜不力等情况。由于前期河床已冲刷下切，河槽泄洪能力大大增加，洪峰期（Ｑ＝１００００ｍ３／ｓ）基本未出现明显漫滩。本文对局部冲刷的基本规律也作了探讨。

Experimental Study on Effect of Major Flood on Wenmengtan Migrant Region in Sediment trapping Operating Period of Xiaolangdi Reservoir

The model experiment results show that the changes of river configuration is not remarkable and the river training works are suitable for the large floods, but big inflow angle attaching on individual work, large local scouring depth and weak ability of guiding flow, etc., exist after encountering large floods period of Xiaolangdi Reservoir. Owing to the previous scouring of river bed, the flood discharging capacity of channel has increased greatly, and the overbank of floods doesn't appear in the period of flood peak ( Q =10000m 3/s). The basic law of local scour is also discussed in this paper.