一、引言关于滤水管有效长度与出水量或水位降之间的关系,有人认为是近似于线性关系,并提出其经验公式。用该式计算固然简单,但其参数却随着方程分组的不同而不同,误差较大。对此,本文提出用最小二乘意义下的曲线拟合法确定滤水管有效长度的经验公式,其精度更高,使用也方便。 I. INTRODUCTION Concerning the relationship between the effective length of drainage pipe and the amount of water or water drop, some people think it is similar to a linear relationship and put forward its empirical formula. Using this formula is simple, but its parameters are different with the grouping of equations, the error is larger. In this regard, this paper proposes an empirical formula to determine the effective length of the drainage pipe by the curve fitting method in the sense of least squares, which has higher accuracy and is convenient to use.