三峡蓄水以来青岩子河段的演变规律*

通过大量的地形、水文、流速流向资料,详细分析了三峡蓄水以来变动回水区下段青岩子河段的泥沙淤积特点,得到了几点认识:1)三峡蓄水后青岩子河段汛期水位抬高较少,流速约有减缓,以致未大幅淤积,这与模型试验论证成果略有差别;2)青岩子河段淤积时间主要发生在9-10月间坝前水位抬升时,淤积部位主要发生在金川碛尾、五羊溪、牛屎碛深槽及桌子角;3)淤积区域与所处的河型有关;4)随着三峡水库的继续运行,青岩子河段将会发生河型转化.

On evolution rule of Qingyanzi reach after impoundment of the Three-Gorges Reservoir

Collecting a lot of data of terrain,water level,flow velocity and direction,this paper analyzes the sedimentation rule of Qingyanzi reach which is the fluctuating backwater area after the impoundment of the Three Gorges Reservoir.The following conclusions are drawn: 1)Since the water level exaltation and flow velocity palliation are less,deposition does not occur in general in Qingyanzi reach.This is different from the conclusion of the physical model experiment research;2)Sedimentation mainly occurs in Sep...