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| DOI：10.13522/j.cnki.ggps.2019112 |
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| Characteristics of drought spatio-temporal transformation in Shanxi Province |
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LIU Liwen, DUAN Yonghong*, XU Lishuai, LIU Zhengchun, JIANG Xin
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College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
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| Abstract: |
| 【Objective】Remote sensing as a tool can obtain soil moisture data quickly and accurately, and then provides scientific basis for agricultural drought monitoring.【Method】Based on the data of surface temperature and vegetation index of MODIS in the summer between 2009 and 2018, the data of agricultural drought condition was obtained through the TVDI model, and the spatio-temporal variation of agricultural drought in Shanxi province was studied by means of trend analysis, stability analysis, Hurst index and so on.【Result】In the past 10 years, the drought condition of Shanxi Province in the summer was generally normal, and the drought was mainly concentrated in the southern area. And the change of the trend showed that the central part of Shanxi was becoming more humid, while the southern area became more arid. In addition, the value of TVDI was negatively correlated with the elevation and the slope. The stability analysis showed that the change of the TVDI value tended to be moderately stable, meanwhile the H-index indicated that the center of Shanxi's region will continue to become significantly wet, while the southern area will continues to become slightly dry.【Conclusion】In the future, most areas will still be in a stable and humid state of agricultural drought in summer in Shanxi Province. |
| Key words: Shanxi province; soil moisture; agricultural drought; TVDI; trend analysis; stability analysis; hurst index |
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