摘要
利用老哈河流域红山水库坝址处1961—2000年逐月径流资料,采用M-K等多种趋势分析方法,检验了流域径流的变化特征及演变趋势.结果表明:近40 a期间(1961—2000年)老哈河流域年径流量减少趋势不显著,而1961—1990年近30 a期间则有显著的减少趋势,1961—1975年的径流量较1976—1990年的径流量明显要高;径流月变化趋势:各年代与60年代相比,尤其是80年代径流有减少趋势的月份占大多数,其中7月和8月减少量最为明显;月径流年变化趋势:40 a期间,多数月份表现为负趋势变化,其中4月份表现出很强的负趋势变化;40 a期间,春、夏、秋3季径流均有减少,夏季减幅最大,80年代减幅最明显,冬季径流表现为弱正趋势变化,夏季与秋季表现为弱负趋势变化,春季表现为显著的负趋势变化;无论洪水季节,还是枯水季节,70、80和90年代径流都比60年代同期径流有所减少.其中,80年代减少最为明显,洪水季节较枯水季节径流减少更为显著.洪、枯季节径流都表现为不显著的负趋势变化.另外,近40 a来,年径流量跃变不显著;而春季,尤其是4月份径流量有显著跃变,跃变年份为1980年,1980年以后春季径流量较之前明显降低.
Using monthly runoff data at Hongshan reservoir dam in Laohahe river basin, and through a variety of trend analysis, the characteristics and trend of runoff in the basin was examined. The runoff in Laohahe river basin from 1961-2000 showed non-significant reduction, while from 1961-1990 showed signifieant decrease. Runoff from 1961-1975 was significantly higher than 1976-1990. In terms of monthly runoff, when compared with 1960s, months with reduced runoff in each decade, especially in 1980s, accounted for the majority, with July and August runoff reductions most apparent. In the 40 year period, most monthly runoff had negative trend, with April showing a strong negative trend. In the 40 year period, runoff was reduced in spring, summer and autumn. The greatest reduction was in summer, with the most significant reduction found in 1980s. Winter runoff has a slight increasing trend, summer and autumn runoff showed slight decreasing trend. The runoff in 1970s, 1980s and 1990s all declined when compared with 1960s, both in flood or dry seasons. Of these, the most obvious decrease occurred in 1980s. The runoff in both flood and dry seasons showed no significant negative trend. In addition, during the 40 year period, the runoff showed nonsignificant jump. In spring, particularly in April, the runoff showed a significant jump in 1980. After the 1980, runoff was significantly lower than before.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第6期629-634,共6页
Journal of Beijing Normal University(Natural Science)
基金
国家重点基础研究发展规划资助项目(2006CB400505)
中国气象局气候变化专项资助项目(CCSF2006-17)
关键词
径流
趋势检测
跃变
老哈河流域
runoff
trend analysis
jump
Laohahe river basin
