提出了基于二维数学模型对溢洪道下游三维复杂运动流场进行模拟计算的一种新方法。通过对泄洪建筑物下游河道复杂流场水流运动及河床冲刷状况的分析，研究了自由面流消能区水流扩散方式、流动特征及相关水力要素的概化确定。根据主流下回流区和表层水股之间质量交换很小的特点，提出了把底部回流区域作为河道无实际过流部分即修正河流下边界条件，对溢洪道挑坎下游复杂流场进行二维数值模拟的方法。利用上述方法对某工程实例进行了数值模拟计算，计算结果与实际流场状况比较一致，较为真实的反映了自由面流区的流动。

本文针对悬臂式拱形围护结构的性状作了较系统地分析，考虑了插入深度、坑底土质、拱形状、拱壁刚度等因素对悬臂式拱形围护结构性状的影响。文中详细地分析了各因素对悬臂式拱形围护结构性状的影响规律，这些规律对悬臂式拱形围护结构的设计与应用具有重要的参考价值。

In this paper, the erosion-resisting coefficient is introduced to compute bed deformation in a crush bedrock river. In the case of crush bedrock, there is no proper control equation to describe bed stability, which leads to difficulty in calculation of the bed deformation through conventional method. The data from field survey are used to generalize the erosion-resisting capability where erosion-resisting coefficient describes. After the determination of longitudinal distribution expressed by polynomial regression and transversal distribution expressed by normal distribution function, the plane distribution of erosion-resisting coefficient in a crush bedrock river is obtained. With the computational results from horizontal 2-D flow mathematical model, erosion-resisting coefficient and controlling condition of local stability are employed to compute the values of bed deformation when riverbed is stable. The above method is applied in a case study, and the computational results of flow and bed deformations are in good agreement with physical model test data.

The chaotic characteristics and maximum predictable time scale of the observation series of hourly water consumption in Hangzhou were investigated using the advanced algorithm, presented here is based on the conventional Wolf'salgorithm for the largest Lyapunov exponent. For comparison, the largest Lyapunov exponents of water consumption series with one-hour and 24-hour intervals were calculated respectively. The results indicated that chaotic characteristic obviously exist in the hourly water consumption system, and that observation series with 24-hour interval have longer maximum predictable scale than hourly series. These findings could have significant practical application for better prediction of urban hourly water consumption.

本文针对单支撑拱形围护结构的性状作了较系统的分析，考虑了拱脚桩变形、插入深度、坑底土质、拱形状、支撑位置、支撑刚度、拱壁刚度和土压力平面分布形式等因素对单支撑拱形围护结构性状的影响。文中详细地分析了各因素对单支撑拱形围护结构性状的影响规律，这些规律对单支撑拱形围护结构的设计与应用具有重要的参考价值。