[1]ZHANG Zhaopeng,DUAN Keqin.Change and Retrieval of Runoff in the Northern Foothills of Qinling Mountains from 1970 to 2015[J].Research of Soil and Water Conservation,2022,29(02):206-211.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 02
Page number:
206-211
Column:
Public date:
2022-03-20
- Title:
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Change and Retrieval of Runoff in the Northern Foothills of Qinling Mountains from 1970 to 2015
- Author(s):
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ZHANG Zhaopeng, DUAN Keqin
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(School of Geography and Tourism, Shaanxi Normal University, Xi'an 710100, China)
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- Keywords:
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Qinling Mountains; VIC model; runoff; precipitation
- CLC:
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P333
- DOI:
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- Abstract:
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The key point whether Weihe River Basin can develop in a high quality depends on the water resources. However, the northern foothills of Qinling Mountains is the important area of water production in Weihe River Basin. In order to explore the change characteristics of the water resources in the northern foothills of Qinling Mountains in recent years, we adopted VIC(Variable Infiltration Capacity)model which 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 watershed; in the validation period, NS, R2 and RE were 0.81, 0.94 and 4.6, respectively; the runoff volume of the northern foothills had fluctuated between 1.601 billion m3 and 6.54 billion m3 per year in the past 46 years; the maximum runoff reached 6.54 billion m3 in 1983 and the minimum runoff was only 1.6 billion 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 3.52 billion m3 per year in many years over the last 46 years. Precipitation is the leading factor of runoff variation and the most important influencing factor in hydrological simulation.