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介绍在西非法语地区按照欧洲规范和法国规范的一种常用的涵洞水文水利计算方法。此方法对地域性或经验统计数据的要求不高,特别是在气象统计数据较少的非洲法语区国家和地区较为适用。通过所要计算的汇水盆地所在区域的地形、地貌特点和通过气象观测资料所推算出来的10年一遇日降雨量大小等,计算出重现期为10年的洪水设计汇水流量,最后乘以相应的系数,可得到重现期为50年和100年的汇水流量。
A common calculation method for hydrological and culvert water volume in culverts in the West African-speaking French region in accordance with European norms and French norms. This method does not require high level of regional or empirical statistics, especially in French-speaking countries and territories with less meteorological statistics. According to the topography and geomorphic features of the catchment area and the 10-day daily rainfall projected by meteorological observation data, the flood design catchment flow with the return period of 10 years is calculated and multiplied by With the corresponding coefficients, the catchment flow of 50 years and 100 years can be obtained.