数字滤波在灌区小流域径流分割中的应用初探  

Application of digital filtering in runoff separation in small watershed in irrigation area

作　　者：韩培丽[1] 代俊峰[1] 

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004

出　　处：《人民长江》2012年第3期52-54,87,共4页Yangtze River

基　　金：国家自然科学基金项目(51009031);水资源与水电工程科学国家重点实验室开放基金项目(2010B069);广西研究生教育创新计划资助项目(2011105960815M06);桂林理工大学博士基金项目(006206242)

摘　　要：研究灌区径流分割,对于认识灌区产流过程及其特点,提高水资源的利用率和实施科学的灌区水管理具有重要的意义。以湖北省漳河灌区内的水库小流域为研究对象,基于小流域2004～2006年的产流资料,运用数字滤波技术进行灌区小流域径流的水源划分。该技术方法提供3个通道滤波,结合实际情况计算得到基流分割参数,并分析了不同计算时段的基流指数等参数的差别及其原因。研究结果表明,针对灌区小流域径流分割,数字滤波技术具有客观、操作简便而快速、采用的参数较少,以及精度高等优点,对认识灌区产流机理具有重要意义。The study of runoff separation in the irrigation area is of great significance for understanding the runoff - producing process and characteristics, improving the utilization of water resources and implementing water resources management scientifically in the irrigation area. A small reservoir watershed in the irrigation area of Zhanghe River in Hubei Province is taken as a research object, and the headwater division of small watershed in the irrigation area is carried out based on the data of runoff yield from 2004 to 2006 with the digital filtering technique. Three channel filterings are provided in the technological approach, a base flow index Fr （ base flow ratio of total runoff） is calculated by each of them. According to the actual situation of the study area, as the base flow index, the third Fr is selected. The parameters of base flow separation such as daily flow, base flow index of daily flow in the rice growth period and non -rice growth period are calculated. Moreover, the differences and reasons of the parameters such as the base flow index in different calculation periods are analyzed. The results show that the digital filtering technique has the advantages of objective, simple and fast, less parameters, as well as high precision in view of runoff separation in the small watershed of irrigation area.

关 键 词：滤波技术 基流分割 灌区小流域 漳河灌区 

分 类 号：S27[农业科学—农业水土工程]