摘要
为明晰怒江流域基流时空分异特征,利用数字滤波法进行怒江干流和南汀河支流的基流研究。结果表明:1怒江干流3站基流指数IBF在0.71~0.74之间,南汀河支流2站的多年平均IBF在0.68左右,南汀河支流IBF明显低于怒江干流,干支流基流量和IBF自上游向下游递增;2各站基流量与径流量变化过程基本一致,两者相关系数均在0.9以上;3怒江干支流各站多年平均基流量和径流量年内分配均呈"尖廋"的单峰形,而多年平均基流指数年内分配均呈"V"字形,但两者变化过程不完全相反;4怒江干流代表站道街坝站和南汀河支流代表站姑老河站IBF均为丰水年<平水年<枯水年,这与基流相对于径流更为稳定有关。
In order to examine the spatial-temporal differentiation characteristics of the base flow in the Nujiang River Basin, the digital filtering method was used to analyze the base flow in the main stream of the Nujiang River and in the Nantinghe River, which is one of tributaries of the Nujiang River. The results are as follows： （1） The multi-year average base flow index （ BFI ） was between 0. 71 to 0. 74 for the three hydrological stations over the main stream of the Nujiang River. The multi-year average BFI was around 0. 68 for the two hydrological stations over the Nantinghe River, which was significantly lower than that for the main stream. The volume of base flow and BFI increased from upstream to downstream for both the main stream of the Nujiang River and the Nantinghe River. （2） The variations of the base flow and runoff were basically consistent, and their correlation coefficient exceeded 0. 9. （3） The average intra-annual variations of the base flow and runoff exhibited a single peak pattern, while the average intra-annual BFI had a V-shaped variation for all of the hydrological stations over the main stream of the Nujiang River and the Nantinghe River. However, their variations were not exactly opposite. （4） The BFI values were ranked in the following ascending order： the wet year, the normal year, and the dry year, for the Daojieba Station, which is a typical hydrological station of the main stream of the Nujiang River, and for the Gulaohe Station, which is a typical hydrological station of the Nantinghe River. This is because base flow is more stable than runoff.
出处
《水资源保护》
CAS
CSCD
2017年第1期18-23,共6页
Water Resources Protection
基金
江苏省博士后科研资助计划(1501060B)
云南省水利科技项目(2014003)
关键词
基流量
径流量
基流分割
数字滤波法
时空分异
怒江流域
base flow
runoff
base flow separation
digital filtering method
spatial-temporal differentiation
Nujiang River Basin
