| Dam safety is the core of the problem in design and management of hydraulic structures. Dam-break model is of tremendous importance to the damage assessment, disaster control and reduction, and people protections. Based the theory of hydraulics, mathematical statistics and grey correlation degree, a numerical model is developed which includes three parts:dam-break water model; two dimension dam-break flood propagation route calculation and dam-break gray correlation analysis.The main research content and conclusions:(1) Dam-breach flow modelSelecting the international usually adopted weir flow formula, a calculating program is developed to simulate dam-breach flow process. The dam-break phenomenon is extremely complex, so reasonably simplified is desirable In this model, calculation of flood flow propagation integrates with regulation of reservoir volume and simulation of process of dam-break.(2) Flood flow propagation modelAccording to the characteristics of the flood flow propagation,2D numeric model is developed. The former model calculation result is used as up-boundary condition. It is applied to predicting the result of dam-break flood flow and methods to reduce risk of the flood, and used to analysis the present flood carrying capacity of a river(such as Yufu River).(3) Dam-break grey correlation degree and flood control evaluation analysisBased the theory of grey correlation degree, a model is used to analysis the influence factors of dam failure. The correlation serial result is rB> rH>(?)bb,and this is s consistent with the descriptions in the formula. So applying grey correlation theory to dam-break is feasible. In addition, the flood control impact assessment of Yufu River is contained in this article. |
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