干旱区生态环境知识资源中心(Arid): 黄河源区基流变化及影响因子分析

Arid

	黄河源区基流变化及影响因子分析
其他题名	Change of the Baseflow and It＇s Impacting Factors in the Source Regions of Yellow River
	陈利群 1; 刘昌明 1; 郝芳华 2; 刘九玉 3; 戴东 3
ISSN	1000-0240
出版年	2006
卷号	28 期号:2 页码:141-148
中文摘要	利用黄河源区的4个水文站及13个气象站的日系列资料，基于改进的加里宁基流分割法，分析了1956-2000年以来黄河源区基流和以水文站为节点控制的各个子流域的基流变化及其影响因素．结果表明：黄河源区基流比例较大，多年平均基流指数为0．652；黄河沿以上流域基流指数为0．556，黄河沿-吉迈区间基流指数为0．588，吉迈-玛曲区间基流指数为0．649，玛曲-唐乃亥区间基流指数高达0．704．从绝对量来看，黄河源区多年平均基流量为132．4610^8m^3；子流域中，玛多以上流域基流量最小，为3．9210^8m^3，吉迈-玛曲区间基流量最大，为68．82*10^8m^3．对于整个研究区，年降水量决定年基流量，气温影响基流．气温升高，基流减少．不同子流域的基流对气候变化响应不同，玛曲以上各个子流域基流随气温升高而减少，而在玛曲-唐乃亥区间年气温对年基流量无明显影响．黄河源区年代尺度基流指数和降水量成反比关系．
英文摘要	The purpose of this study is to identify and assess the change of baseflow and climatic impacting factors in the source regions of the Yellow River, based on the analyses of long hydrological time series （1956--2000） from four subbasins of the source regions of the Yellow River and the whole source regions of the Yellow River. Kalinin baseflow separation technique has been improved based on the characteristics of climate and streamflow of the study regions, then applied to estimate baseflow. Statistical method is adopted in order to investigate the effect of climate factors on baseflow. Annual mean baseflow in the source regions of the Yellow River is 13. 246 billion m3, accounting for more than 60% of the total runoff of the area interested. Annual baseflow is in direct proportion to annual precipitation. The sharp rise in tem perature in the 1990s decreased baseflow significantly. The impacts of climate factors on baseflow are different in different subcatchment. In subba sin above Huangheyan Hydrologic Station, which is relative cold and arid with annul mean temperature of --3.84 ℃ and the water area accounted for 7.95% of the subbasin, both temperature and precipitation nearly had no direct impacts on baseflow on annual time scale. The increasing temperature thaws frozen soil more rapid, thus lowers the groundwater table and lake water level, hence decreases water supply of baseflow from groundwater and lake water. In subbasin between Huangheyan and Jimai Hydrologic Station baseflow is influenced both by precipitation and temperature but the response rate of baseflow to precipitation is more rapid than temperature. In subbasin between Jimai and Maqu Hydrologic Stations precipitation and temperature area two key factors impacting baseflow, but the effect of precipitation is more pronounced than temperature, while in suhbasin between Maqu and Tangnag Hydrologic Station precipitation is the only climate factor affecting baseflow in short term. The factors inducing serious decrease of haseflow in the 1990s are also investigated into.
中文关键词	黄河源区 ; 基流 ; 降水 ; 气温
英文关键词	source regions of Yellow River baseflow precipitation temperature
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:2318339
来源机构	中国科学院地理科学与资源研究所 ; 北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/219429
作者单位	1.中国科学院地理科学与资源研究所, 北京 100101, 中国; 2.北京师范大学环境学院, 北京 100875, 中国; 3.黄河水利委员会水文局, 郑州, 河南 450004, 中国
推荐引用方式 GB/T 7714	陈利群,刘昌明,郝芳华,等. 黄河源区基流变化及影响因子分析[J]. 中国科学院地理科学与资源研究所, 北京师范大学,2006,28(2):141-148.
APA	陈利群,刘昌明,郝芳华,刘九玉,&戴东.(2006).黄河源区基流变化及影响因子分析.,28(2),141-148.
MLA	陈利群,et al."黄河源区基流变化及影响因子分析".28.2(2006):141-148.