峡谷壅水河段推移质输沙规律探讨

Discussion on bed load transport in the backwater reach with a canyon

以奉节站为例,对峡谷壅水河段水沙运动现象进行了描述,分析现有推移质输沙率公式在峡谷壅水河段的预测效果,对峡谷上游附近河段推移质输沙规律进行了探讨,指出峡谷壅水河段由于水深、比降及床面补给的复杂性,推移质运动的不连续性,致使现有输沙率公式不能适用于此类河段。

Taking Fengjie reach as an example,the phenomena of flow and sediment movement in the backwater reach with a canyon are discussed.The applicability of the existing formula in calculating bed load transport rate in the backwater reach with a canyon is tested.The results show that due to the complexity of depth,slope and bed load supply and the discontinuation of bed load movement,the existing formula are not suitable for the calculation of bed load in the backwater reach with a canyon.