摘要
依据洮河流域上、中、下游的下巴沟、岷县、李家村、红旗四个控制水文站点实测月、年径流量资料,运用不同指标对洮河径流的年内变化规律和趋势进行分析。研究表明:50年代至今,洮河流域径流年内分配不均匀性越来越低,上游向下游逐渐由均匀向不均匀变化。运用年内分配不均匀系数、年内分配完全调节系数、集中度和集中期、变化幅度等指标对径流年内变化进行分析,上述指标在洮河流域径流多年变化中呈现逐渐减小的趋势,在流域上、中、下游呈现逐渐增加的趋势。洮河全年径流主要集中在汛期的7、8、9、10月。
In this study,observed runoff series from four hydro-stations respectively named Xiabagou,Minxian,Lijiacun and Hongqi over the Tao River were manipulated for monthly and annual variation analysis assisted by different statistic methods based on special index setup.Results showed that the decadal distribution of channel runoff in the Tao River basin have featured a decline tendency for its heterogeneity,but which increased from the upper reaches to the lower in the past 50 years.Index such as heterogeneous coefficient,overall adjustment coefficient,concentration ratio,concentration duration and variable amplitude presented a gradually decrease along with the time but an increase from the upper reaches to the middle,and then the lower.Amount of the annual channel runoff was mainly concentrated temporally in the period of from July to October.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2011年第9期71-74,共4页
Journal of Arid Land Resources and Environment
关键词
洮河流域
径流年内变化
月(年)径流量
The Tao River Basin
decadal distribution of the channel Runoff
monthly or annual channel runoff
