流量过程线的自动分割方法探讨  

Base Flow Separation from Daily Flow Hydrograph Using Automated Techniques

作　　者：黄国如[1] 

机构地区：[1]华南理工大学土木工程系,广东广州510640

出　　处：《灌溉排水学报》2007年第1期73-78,共6页Journal of Irrigation and Drainage

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-05-0483);国家自然科学基金资助项目(50309002);南京师范大学地理信息科学江苏省重点实验室开放基金资助项目(JK20050305);武汉大学水资源与水电工程科学国家重点实验室开放基金资助项目(2005B019)

摘　　要：为了确定出稳定可靠的流量过程线分割方法,以东江流域中的13个子流域为例,对现行广泛使用的滑动最小值法、HYSEP法和滤波法等自动基流分割方法进行较为深入的探讨。研究结果表明这3类方法的分割结果并不一致,有些情况下差距较大,同时也表明滤波法可以得到较为稳定的基流系数BFI,尤其是第3种滤波法可能为最优的基流分割方法。由于流域空间特征值与BFI之间的相关关系较为密切,利用逐步回归方法构建了这二者之间的相关关系,利用该关系可以由流域的空间特征值推求出无资料地区的基流系数BFI。This paper presents an evaluation of several automated techniques concerned with base flow separation. Three type and eight base flow separation methods are considered, one based on simple smoothing separation rules, three on USGS computer method, and other four on digital filters. Comparisons show that the results of all three types methods are not very different, the results also indices that the digital filters provide a more stable estimation of BFI （base flow index）. A preliminary examining of relationship between BFI and physical characteristics of the basins shows that index can be used as a basin characteris- tic, and it can be calculated from flow data or estimated from basin geology.

关 键 词：基流分割 滑动最小值法 HYSEP法 滤波法 东江流域 

分 类 号：P333.3[天文地球—水文科学]