【作者】 韩晓燕； 钱鞠； 毛泽秦； 王水献；

【Author】 HAN Xiaoyan~1,QIAN Ju~1,MAO Zeqin~2,WANG Shuixian~1 (1.College of Earth and Environmental Science,Lanzhou University,Lanzhou,Gansu 730000,China; 2.Pingliang Scientific Research Institute of Soil and Water Conservation,Pinglianhg,Gansu,744000,China)

【机构】 兰州大学资源环境学院； 甘肃省平凉市水土保持科学研究所；

【摘要】 根据纸坊沟流域1955～2002年一共近50年的降水和径流资料,分析了该流域在这50年内,降水和径流的基本特征以及二者之间的相互关系,同时还定性地分析了径流变化的动因,以及人类活动对径流的影响。主要是采用相关性分析、距平累计、归一化等方法进行分析。分析结果表明:(1)流域的降水和径流的年际变化非常剧烈(Cv分别为0.22和0.76),因而极易导致洪涝灾害,这对于防洪是极为不利的。(2)径流的年内分配集中程度正在不断地增大。这是由于气候变化和人类活动双重作用引起的。(3)纸坊沟流域多年内的径流对降水的变化产生了积极的响应,然而径流量的变化程度却比降水大,这个偏差主要是由于人类活动的影响造成的。更多还原

【Abstract】 Based on the rainfall and runoff data within about 50 years from 1955 to 2002 in Zhifanggou basin,we analysis the basic characteristics of the rainfall and runoff information in the past 50 years.We also analysis the relationship between the two.In addition,Analysis the motivation of the runoff and the effect of human activities on it qualitatively.Mainly used methods like correlation analysis,the cumulative anomalies,normalization,and so on.The results show below: (1) The annual variation of precipitation and runoff in the basin is very sharp and can easily lead to floods,which is very disadvantageous to flood protection. (2) The concentration of the annual distribution of runoff is continuously increasing(Cv respectively 0.22 and 0.76),which is due to the roles of climate change and human activities played in it. (3) The runoff in many years had a positive response on the changing of the rain off.However,the change extent of the runoff is bigger than rainfall.The deviation was mainly resulted by the impact caused by human activities.更多还原