Attribution analysis of runoff evolution in Lijiang River basin
Under the background of climate change and human activities,the attribution analysis of runoff evolution in the Lijiang River basin is conducive to the sustainable use of ecological functions of Lijiang River basin.The an-nual runoff,annual precipitation,average annual temperature and NDVI index of the river basin from 1991 to 2020 were analyzed by linear trend method and cumulative distance level method.The results of analysis demonstrate that each index showed an upward trend,with abrupt changes occurred around 2015,2012,2017 and 2010 respec-tively.The correlation between each index and runoff evolution was analyzed by Pearson correlation coefficient method.Finally,the effects of climate change and human activities on runoff were quantitatively analyzed to further support the results of correlation analysis.The results of study show that the correlation between rainfall and runoff is the highest,and the correlation between air temperature and runoff is the weakest.The contribution of climate change to runoff evolution in the Lijiang River basin was 58.59％,and the contribution of human activities to runoff evolution in the Lijiang River basin was 41.41％.
runoff evolutionattribution analysiscumulative slope change rateLijiang River basin
万方数据
维普
