摘要
基于50年多来长江大通站月平均入海流量数据,制订了研究长江河口盐水入侵的特征水文年的划分标准;并采用Matlab数值计算高级语言中的曲线拟合函数,改进了传统适线法的频率累积曲线的绘制方法,简化了特征水文年划分的步骤,提高了划分的精度,探索了计算机高级语言函数功能在水文计算中的一些应用.
Based on the dataset of water discharge at Datong Hydrological Station from 1946 to 2003,the criterion of the characteristic hydrological year for studying saltwater intrusion in Yangtze River estuary is drawn up in this paper,and the curve fitting polyfit method is used to plot the theoretic cumulative frequency curves.The method makes it easier and more coissident with the fact.So the function of Matlab could be applied to hydrological calculation.
出处
《徐州师范大学学报（自然科学版）》
CAS
2004年第3期65-67,共3页
Journal of Xuzhou Normal University(Natural Science Edition)
基金
三峡工程对长江口及其邻近海域的环境和生态系统的影响研究基金资助项目(985312089)
关键词
长江口
特征水文年
适线法
多项式曲线拟合
Yangtze River estuary
characteristic hydrological year
curve-fitting method
polyfit method
