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1970 2015年秦岭北麓径流重建及变化.pdf


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1970_2015年秦岭北麓径流重建及变化第29卷第2期 水土保持研究 Vol.29,No.2
2022年4月 based on the principle of hydrological similarity and applied typical watershed reference method to retrieve
the changes of runoff in the northern foothills of Qinling Mountains.The results show that VIC model has a
high applicability in the observed watershed;in monthly runoff simulation,Nash coefficient(NS)is greater
than 0.76,correlation coefficient(R2)is greater than 0.91,and relative error(RE)is less than±15%;the
hydrological parameter transplantation model can be used to restore the runoff change in unobserved water-
2 
shed;in the validation period,NS,R and RE were 0.81,0.94and 4.6,respectively;the runoff volume of
the northern foothills had fluctuated between 1.601billion m3 and 6.54billion m3 per year in the past 46
years;the maximum runoff reached 6.54billion m3 in 1983and the minimum runoff was only 1.6billion m3
per year in 1977;the runoff in high flow year was four times higher than that in low flow year,which
showed the obvious interannual variation of runoff;the average annual runoff in the northern foothills of
Qinling Mountains was 3.52billion m3 per year in many years over the last 46years.Precipitation is the lead-
ing factor of runoff variation and the most important influencing factor in 

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  • 时间2022-03-02