基于MATLAB的三次样条插值在绳套型水位流量关系定线推流中的应用  

Application of Cubic Spline Interpolation Based on MATLAB to Determination of Loop Relation Curve of Stage-Discharge

作　　者：陈靓 朱庆云[2] 王书亮[3] 

机构地区：[1]江苏省秦淮河水利工程管理处,江苏南京210001 [2]江苏省水文水资源勘测局南京分局,江苏南京210008 [3]江苏省水文水资源勘测局盐城分局,江苏盐城224000

出　　处：《江苏水利》2014年第7期28-29,31,共3页Jiangsu Water Resources

摘　　要：对于绳套型水位流量关系,常用连时序法定线,即:手工绘制水位流量关系曲线。通过实例介绍了利用三次样条插值进行绳套水位流量关系定线的方法,编写Matlab程序由计算机代替人工完成繁琐的手工作业,处理方法简单实用。误差分析表明,插值流量与人工推算流量的相对误差很小。For determining the loop relation curve of stage-discharge,sequential method is commonly used,i.e,to manually draw the curve of stage-discharge. With an example, the paper discussed a practical and useful process determining the loop relation curve of stage-discharge based on cubic spline data interpolation. With a Matlab procedure, the computer did the tedious job which was normally done by hand. Error analysis shows that the relative error between the discharge calculated by computers and the discharge manually estimated is very small.

关 键 词：三次样条插值 水位流量 关系曲线 

分 类 号：P333[天文地球—水文科学]