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本文用地理综合法研究安徽山区河流的水文特征,分析了大别山区和皖南山区的地形、降水、流域坡面及河道坡度、流域糙率等,认为两区有所区别,不宜简单地划为同一地理区。提出了设计洪峰流量考虑的因素和两区河流设计洪峰流量公式。并附皖南山区某桥址设计洪峰流量计算实例,与历史洪水调查及 Cv 公式计算结果相校合,说明本文公式具有一定精度。
This paper studies the hydrological characteristics of the mountainous rivers in Anhui Province by using the method of geographic comprehensive analysis, analyzes the topography, precipitation, slope area of the Dabie Mountains and the mountainous areas of Southern Anhui, the roughness of the river basins, the roughness of the drainage area, etc. It is considered that the two areas are different and should not be simply divided into the same Geographical area. The factors of design flood peak flow and the formulas of flood peak flow of two rivers were proposed. And with a calculation example of flood peak design of a bridge in the southern mountainous area, which is consistent with the results of historical flood investigation and calculation of Cv formula, it shows that the formula in this paper has a certain accuracy.