| 引用本文: | 刘立文,段永红,徐立帅,等.山西省农业干旱时空变化特征[J].灌溉排水学报,2020,39(2):114-121. |
| ,et al.山西省农业干旱时空变化特征[J].灌溉排水学报,2020,39(2):114-121. |
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| 摘要: |
| 【目的】通过遥感快速准确地获取土壤湿度数据，为农业旱情的监测提供科学依据。【方法】选择山西省为研究区，以2009—2018年夏季的MODIS地表温度和植被指数数据为基础，通过TVDI模型获取农业旱情状况，并通过趋势分析、稳定性分析、H指数等方法研究山西省农业干旱时空变化特征。【结果】2009—2018年山西省夏季农业旱情总体呈现出正常偏干旱分布，且干旱主要集中在晋南地区。趋势变化表明，山西中部部分地区湿润程度逐步提高，而晋南地区湿润程度则逐步降低，此外TVDI值与高程和坡度负相关，高程越低，坡度越小的地区越干旱。研究区2009—2018年夏季时节的TVDI值变化趋于中度稳定。H指数表明，山西省晋中部分地区将继续显著湿润，而晋南地区继续轻微干旱。【结论】未来山西省夏季农业旱情除晋南会呈现出一种稳定持续轻微干旱外，大部分地区仍然处于一种稳定持续湿润的状态。 |
| 关键词: 山西省；土壤湿度；农业干旱；TVDI；趋势分析；稳定性分析；H指数 |
| 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 |
