论推理公式的基本原理和适用条件  

On Basic Principle and Applicable Conditions of Reasoning Formula

作　　者：王国安[1] 贺顺德[1] 李荣容[1] 李超群[1] 盖永岗[1] 王鹏[1] 

机构地区：[1]黄河勘测规划设计有限公司,河南郑州450003

出　　处：《人民黄河》2010年第12期1-4,共4页Yellow River

摘　　要：推理公式Qm=CIA是假定在流域汇流时间τ内,降雨强度I、径流系数C和汇流速度V三者的时空分布都是均匀的,流域形状呈矩形,并且洪水前底水为零,而建立起来的。用等流时线法的概念和流域汇流理论,证明了推理公式没有考虑流域调蓄作用,也没有考虑槽面降水和地下径流的影响。因此,推理公式只适用于山区丘陵区小流域的设计洪水计算,而不适用于平原河流和平原河网地区排涝计算。Reasoning formula Qm=CIA is established based on assumption that temporal and spatial distribution of precipitation intensity I,runoff coefficient C and concentration velocity V are even,drainage basin in rectangular shape and zero bottom water before flood within concentration time τ of the basin.It proves the reasoning formula the lack of considering pondage action of the basin and the influence of precipitation and groundwater flow by using the concept of channel travel isochrone method and the theory of concentration of drainage basin.Thus,the reasoning formula is applicable to the calculation of design flood of small watersheds in hilly area,but not to the calculation of storm drainage of plain river and river system in flat region.

关 键 词：推理公式 洪峰流量 降雨强度 径流系数 汇流时间 

分 类 号：TV124[水利工程—水文学及水资源]