The Contributions of Climate Change and Human Activities on Runoff of the Tingjiang River
Based on 1965-2012 average daily runoff measured data of control hydrometric station ( Xi Kou) in the Tingjiang Basin,and daily precipitation and daily temperature of three meteorological stations in the Tingjiang Basin ( Chang Ting, Shang Hang,Yong Ding) . Paragraph mean comparison, 5a sliding trend line analysis and cumulative anomaly methods are used to analyze runoff series in recent 50 years. The trend of runoff variation is revealed. The mutation years of runoff variation are identified. The stages of runoff variation are divided. The improved cumulative slope rate comparison method is used to quantitatively analyze the contribution rate of the climate change and human activities to runoff variation of Tingjiang in nearly 50 years. The results show that:(1)The runoff shows a down-up-down fluctuation in general, and the mutation year is 1972 and 2001, the variation stages of runoff are 1965-1972 (stage A),1973-2001 (stage B),2002-2012 (stage C). (2)Comparing with stage A, the contribution rates of climate change to runoff variation in stage B and C are 65.1％ and 50.5％, respectively, while the contribution rate of human activities to runoff variation is 34.9％ and 49.5％, respectively. This shows that the contribution of human activities to the change of runoff is increasing prominent.
runoffclimate changehuman activitycontribution rateTingjiang River
NETL
NSTL
万方数据
维普
