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小流域设计洪水推理公式简化计算 预览 被引量:2

Simplified calculation of reasoning formula for design flood of small watershed
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摘要 利用小流域设计洪水推理公式计算洪峰流量涉及超越方程求解,现有的迭代法及简化公式法均存在计算过程繁、求解精度差,而利用计算机求解又不便工作。综合牛顿迭代与简单迭代法的优点,整理推求出了理论解析计算公式,并采用优化拟合法对理论计算公式进行了拟合替代,获得了表达形式简单、计算便捷、便于实际应用的近似解析式。精度分析显示,该公式的最大计算相对误差小于0.42%。实例计算结果表明:利用该公式完成小流域设计洪峰流量计算,可使计算过程大大简化,工作效率显著提高,具有实用推广意义。 The design of small watershed flood peak flow inference formula involves transcendental equation solving, and the present iterative method and the simplified formula exist complex calculation process and poor solution accuracy, and the use of computer to solve is inconvenient work. Combined the advantages of Newton iterative method and simple iterative method, the paper settled a theoretical analysis formula and fitted a theoretical formula by optimized fitting method and obtained were alternative forms of expression is simple, calculation convenient, to facilitate the practical application of the approximate analytical style. Accuracy analysis shows that to the maximum relative error calculated by the formula is less than 0.42%. An example shows that to use this formula to complete the design of small watershed peak flow calculation can greatly simplify the calculation process, improve significantly the working efficiency and has practical promotion significance.
作者 张丽伟 滕凯 ZHANG Liwei, TENG Kai ( 1. Qiqihar City River Management Office, Qiqihar 161006, China ; 2. Qiqihar Municipal Water Supplies Bureau, Qiqihar 161006, China)
出处 《水资源与水工程学报》 2013年第5期219-222,共4页 Journal of water resources and water engineering
关键词 推理公式 洪峰流量 优化拟合 简化计算 reasoning formula peak flow optimization fitting simplified calculation
作者简介 张丽伟(1969-),女,齐齐哈尔人,高级工程师,主要从事水利防灾减灾及工程优化设计研究。
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