摘要
采用窟野河温家川站1954-1993年的水文资料和降水量资料,应用多种统计分析方法,系统分析了窟野河径流的年内分配及年际变化规律及其影响因素。研究表明:窟野河流域径流年内分配极不均匀,主要集中于7-9月。径流的年际变化剧烈,且呈减少趋势,1980年代以后基本处于枯水时段,与降水量的变化趋势基本一致。从多年平均值来看,温家川站1973-1979年平均年径流量较前期减少24.6%,20世纪80年代以来径流量锐减,年均径流量较1973年以前减少38.6%。在各项水土保持措施中,造林对径流量的影响最大。通过降水-径流双累积曲线的分析表明,径流变化趋势在1973年发生系统性向右偏转,说明径流量变化受降水量和人类活动共同影响。
Based on the hydrologic and precipitation data from the Wenjiachuan station of the Kuye River from 1954 to 1993,using the multi-statistic methods,the paper analyzed the seasonal and annual change trend of runoff,as well as the influencing factor.The results show that the seasonal distribution of runoff was quite uneven mainly cenlered from July to September,while the annual distribution of runoff was different in great scope.To analysis the trend of runoff change,it indicated that there was obvious decline influenced by precipitation and human activity,even rainless since the 1980s.Compared with previous periods（before 1974）,the annual average runoff decreased by 24.6% from 1973 to 1979,and since 1980s,it reduced abruptly by 38.6%.Further more,the change trend of runoff is in general accord with the change trend of precipitation.Among the different soil conservation measures,afforestation exerts the strongest effect on runoff.According to the double mass curve of precipitation and runoff,the runoff deviated in 1973.
出处
《水资源与水工程学报》
2010年第5期32-36,共5页
Journal of Water Resources and Water Engineering
基金
国家重点基础研究发展计划(973)项目资助(2010CB428404)
关键词
径流量
变化趋势
双累积曲线
距平百分率
影响因素
窟野河
runoff
change trend
double accumulatine curve
anomaly percentage
influencing factor
the Kuye River
