考虑长江回水影响的举水危险流量研究

举水属于长江一级支流,历史上曾发生多次大洪水,给当地带来了巨大损失。为此,在综合考虑长江回水顶托对举水影响的基础上,开展了举水危险流量的研究。采用MIKE11水动力模型,通过构建长江和举水的一维河道水动力模型,模拟了长江和举水不同量级洪水组合下的河道洪水演进过程,确定了在长江各量级洪水回水顶托影响下举水柳子港站的危险流量。研究成果可为该地区山洪临界雨量预警指标的确定提供依据。

Study on dangerous flow of Jushui River considering backwater influence of Yangtze River

The Jushui River is a tributary of the Yangtze River. Many big floods occurred in history and brought huge losses to the local society and economy. We studied the dangerous flow of Jushui River considering the backwater effect of the Yangtze River. The MIKE11 was used to construct one-dimensional hydrodynamic model for the Yangtze River and the Jushui River. The flood routing of Yangtze River and the Jushui River with different flood composition were simulated. The dangerous flows at Liuzigang Station, Jushui River, corresponding to different magnitude floods of the Yangtze River were determined. The results can provide scientific basis for the determination of the critical rainfall warning indexes in this area.