【作者】 龚家国； 贾仰文； 周祖昊； 郝春沣； 彭辉；

【Author】 Gong Jiaguo;Jia Yangwen;Zhou Zuhao;Hao Chunfeng;Peng Hui;Department of Water Resources,China Institute of Water Resources and Hydropower Research;

【机构】 中国水利水电科学研究院水资源研究所；

【摘要】 流域水文尺度效应是当代水文科学研究的焦点。降雨-径流过程是流域水文过程中重要的过程之一。利用泾河流域153个雨量站和6个径流站的1991～2000年的逐日水文资料,在评价水文条件相似度的基础上,对降雨—径流过程随流域空间尺度的变化规律进行了初步研究,结果表明:泾河流域内,不同空间尺度的径流累计增长随时间呈显著的线性增长规律,其径流累计增长系数随着流域空间尺度的增大呈显著线性相关关系,存在明显的尺度效应;多年平均径流深和径流系数与流域土地利用类型具有显著的相关关系,而与流域空间尺度没有明显的相关关系。更多还原

【Abstract】 Watershed hydrological scale effect is the focus of hydrology research at the present.Rainfall-runoff process is one of important hydrological processes.By use of daily hydrological data at 153 rainfall stations and 6 hydrological stations in Jinghe river basin,the change of rainfall-runoff process by watershed scale was preliminarily studied on the basis of evaluating hydrological similarity.The results showed that runoff cumulative increase had a significant linear relationship with time in different watershed scales;the factor of runoff cumulative increase with the increase of watershed scale had a significant linear relationship and there was an obvious scale effect.There were significant correlations among annual average runoff depth and runoff and land use types,but no significant correlation with the watershed scale.更多还原