数字滤波进行基流分割的应用研究  

Application and Study on Base Flow Separation Using Digital Filters

作　　者：林凯荣[1] 陈晓宏[1] 江涛[1] 李超群[2] 

机构地区：[1]中山大学地理科学与规划学院,广东广州510275 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《水力发电》2008年第6期28-30,88,共4页Water Power

基　　金：“十一五”国家科技支撑计划课题(2006BAB14B07);中山大学青年教师科研启动基金资助项目

摘　　要：在傅里叶分析的基础上,阐述了数字滤波分割基流的基本原理;选择汉江老灌河流域为研究对象,采用数字滤波进行基流分割的应用分析研究。结果表明:该方法具有简单方便、可操作性强等优点,而且能够再现分割的结果,使用者能够在分割基流的过程中比较方便地加入自己的经验。一般取0.85、0.9和0.925三个滤波参数值分别进行正反两次的滤波,可以得到较好的结果。Based on the Fourier analysis, the basic theory of base flow separation using digital filter is presented. The Laoguanhe watershed of the Hanjiang River was selected as case study and digital filter was used to conduct base flow separation. The results showed that such method is easy to use and operation and has the advantage that it can re-display separation results and can be adjusted by the user to take into account personnel experience in separation of base flow, Generally it takes three wave filter parameters of 0.85, 0.9 and 0.925 to conduct the forward and backward wave filtering which can gain good results.

关 键 词：基流分割 数字滤波 频谱分析 

分 类 号：TV121[水利工程—水文学及水资源]