一二维衔接洪水演进模型在永定河泛区的应用研究

随着我国经济的发展,蓄滞洪区内不断进行开发利用,洪灾造成的生命与财产损失越来越严重,对滞洪区的调度运用就显得至关重要。建立蓄滞洪区一二维多口门衔接的洪水演进数学模型,根据1956年洪水资料,应用此模型对永定河泛区洪水演进过程进行模拟计算,通过计算对泛区的代表位置的水位和进行了验证。验证结果表明计算值与调查值吻合较好,同时模型对不同来流情况进行数值模拟,通过模拟得到泛区内分洪口门水位启用时间、淹没情况等信息。从而为泛区的防洪调度提供理论依据。

基于洪水演进数值模拟的洪灾生命损失计算方法研究

通过建立的一二维衔接洪水演进数学模型,对永定河泛区的洪水演进进行数值模拟,得到泛区内水位、流量、淹没范围等信息。在此基础上对泛区的洪灾生命损失进行计算,并对洪灾生命损失计算的D&M公式进行了修正,从而能够更好地反映预警时间与洪水风险特征之间的关系。计算结果表明修正效果较好,修正后的公式更具适用性。

Application of the Sediment Mathematical Modelling on Planned Project of Lingdingyang Bay

Based on the combined hydraulic calculation for the eastern network region at the Pearl River estuary and several outlets to the Lingdingyang Bay, the sediment calculation modelling was introduced in the establishment of the sediment mathematical model for Lingdingyang Bay and the eastern region with one and two dimensional flow calculation. Model adjustment and verification were performed in conjunction with field data. The simulated results coincide well with measured data.In addition the model is applied to predict the shore-line planning scheme of Lingdingyang Bay.The theoretical criterion is provided for the shore line plan in the model.And a new mathematical simulated method is put out to research the planning engineering concerned with one-dimensional net rivers and two-dimensional estuary.