桥梁流量的模糊层次分析

在水文比拟法的基础上,以气候和下垫面条件相似为根本出发点,运用模糊相似计算原理,提炼出19个模糊相似控制因子。然后,引入层次分析法,为各因子确立了合理的权重。再按众多被作为选择对象的已知水文站与目标样本的相似程度来排序,找出与目标样本最为相似的几个水文站。最后,用水文比拟法对相似流量进行修正,得出目标样本的流量。从而建立桥梁设计流量的模糊层次分析模型,为计算无流量观测资料的中小流域流量这一难题增加了一种有效的方法。通过实例计算,论证了该模型计算简便、直观,计算结果较其他方法更接近实际。

Fuzzy Hierarchy Process Analysis of Bridge Water Flow

Based on assessing hydrologic analogy,according to climate fluctuation and the condition of the under lying surface,and by means of the fuzzy similar theory as well,19 fuzzy similar controlling factors are refined in this paper.Then the analytic hierarchy process is used to calculate the reasonable weight of indexes.A large number of selected hydrological date series are arranged by their similar degrees compared to the object samples.Find out the several hydrological date series,which are more similar to the object samples than others.Finally,this similar water flow is corrected by the assessing hydrologic analogy and the water flow of object sample is worked out.Consequently,the fuzzy assessing hydrologic analogy model of water flow is established.Accordingly,the paper offers an effective method to solve the difficult problem about the water flow calculation in the middle and small river basins where the hydrologic dates are not available.This model is not only convenient and direct in calculation but also nicety in the result,which has been proved by calculation examples.