摘要
以太行山区崇陵小流域为研究区域,采用1959—1967年、1985—2008年历史实测降雨产流资料,分析了研究区降雨特征及产流过程响应特征,并对比了不同时期降雨径流变化。结果表明:1研究区6—9月降雨以小雨为主,产流主要由暴雨和大雨控制;2产流机制以超渗产流为主,在前期湿润条件下,长历时低强度降雨也会造成蓄满产流;3与1959—1967年相比,1985—2008年的暴雨、大雨、中雨雨日分别减少26.1%、25.0%和12.4%,年径流系数减小80%,且降雨径流相关性减弱,说明人类活动成为影响径流量的重要因素。
Using Chongling small watershed in Taihang mountains area as a study area, based on the observed rainfall and runoff data from 1959 to 1967 and from 1985 to 2008, this study analyzed the rainfall characteristics and the corresponding response of the runoff process and compared the change of rainfall-runoff in the two periods.The results show that a) the main rainfall type during June and September is light rain and the runoff is controlled by heavy rain;b) The runoff yield mainly takes the form of infiltration excess runoff and the saturation excess runoff is generated only by long duration and low intensity rainfall under pre-wetting conditions and;c) Comparing the data of 1985-2008 and that of 1959-1967, the mean annual rain days of storm, heavy rain and moderate rain decrease 26.1%, 25.0% and 12.4% respectively, the runoff coefficient reduces by 80%and the rainfall-runoff correlation coefficient decreases obviously.These results show that the human activities have become the significant factor for rainfall-runoff relationship in Taihang mountainous area.
出处
《人民黄河》
CAS
北大核心
2015年第12期16-18,22,共4页
Yellow River
基金
国家自然科学基金资助项目(41501027
41330529)
关键词
产流机制
降雨
径流
小流域
太行山区
mechanism of runoff generation
rainfall
runoff
small watershed
Taihang mountainous area
