摘要
采用秃尾河高家川水文站1956-2005年实测月径流量,对径流年内分配不均匀性、集中程度、变化幅度进行了详细计算;利用滑动平均法和Mann-Kendall秩次相关检验法分析了年径流的变化趋势,最后定量分析了降水和人类活动对径流的影响。结果表明,自20世纪70年代以来流域径流年内分配比较均匀,其中8月份径流量最大;年径流量有明显的下降趋势,自80年代以来人类活动是引起径流急剧减少的主要因素,且影响力度一直在增加。
The uneven distribution,concentration degree and variation amplitude of the Tuwei River runoff are calculated in detail based on the monthly runoff data measured at Gaojiachuan hydrological station from 1956 to 2005.We use the method of moving average and Mann-Kendall rank correlation to analyze the annual runoff change trend and the affections of precipitation and human activities on runoff quantitatively.The results show that intra-annual distribution of runoff is relatively even since 1970s,and the largest runoff appears in August;the annual runoff has obviously declined since 1980s,and human activity is the main cause of the obvious decrease and its impact has been increasing.
出处
《人民长江》
北大核心
2010年第8期47-50,共4页
Yangtze River
基金
国家重大科技支撑项目(10712)
西北农林科技大学科研专项(08080230)
关键词
年径流
变化趋势
人类活动
秃尾河
annual runoff
variation trend
human activity
the Tuwei River
