[1]FAN Lili,GENG Bin,WANG Jilin,et al.Temporal and Spatial Dynamics of Drought and Its Response to Climate Change in the Loess Plateau from 2001 to 2020[J].Research of Soil and Water Conservation,2022,29(06):183-191.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 06
Page number:
183-191
Column:
Public date:
2022-10-20
- Title:
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Temporal and Spatial Dynamics of Drought and Its Response to Climate Change in the Loess Plateau from 2001 to 2020
- Author(s):
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FAN Lili1, GENG Bin1, WANG Jilin2, CHEN Jie3
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(1.Shijiazhuang Vocational Technology Institute, Shijiazhuang 050081, China; 2.Yellow River Institute of Hydraulic Research, Zhengzhou 450003, China; 3.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China)
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- Keywords:
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TVDI; spatial and temporal dynamics; temperature; precipitation; the Loess Plateau
- CLC:
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P426.6; S165+.2; P429
- DOI:
-
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- Abstract:
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To realise the dynamic and continuous monitoring of drought in the Loess Plateau region, based on the Temperature Vegetation Drought Index(TVDI), the temporal and spatial distribution characteristics of TVDI in the Loess Plateau from 2001 to 2020 and the influence of precipitation and temperature on the change of TVDI were studied. The results showed that:(1)TVDI increased at a rate of 0.000 2/a in 20 years, and severe drought occurred in 2005 and 2007. The increase rate of TVDI is relatively low in spring(growth rate=0.000 2/a, R2=0.000 3), the increase rate of TVDI is 0.001 2/a in summer, the increase rate of TVDI is the greatest in the autumn(growth rate=0.004 4/a, R2=0.283 6), and the increase rate of TVDI is decreasing in the winter.(2)In the spring and summer, TVDI will decrease in most areas of the Loess Plateau in the future. In autumn, TVDI will decrease in most places. In winter, TVDI will continue to increase in the future, especially in central Shaanxi.(3)The relationship between TVDI and precipitation in spring, autumn and winter is mainly a negative correlation, and the correlation coefficient is mainly between -0.5 and 0. There is a positive correlation between TVDI and precipitation in summer. In spring and winter, the temperature is negatively correlated with TVDI, that is, the temperature increases, while the TVDI decreases in summer. There is a positive correlation between TVDI and temperature in summer and autumn. The drought degree of the Loess Plateau may decrease in the future, but the drought varies greatly in different seasons. Therefore, the future ecological restoration project of the Loess Plateau should comprehensively consider the local water resources to achieve ecological sustainable development.