| Cite this article: | 邵天意,包斯琴,王楠,等.基于TVDI的旱情时空动态变化监测-以神东矿区为例[J].灌溉排水学报,0,():-. |
| ShAO Tianyi,BAO Siqin,WANG Nan,et al.基于TVDI的旱情时空动态变化监测-以神东矿区为例[J].灌溉排水学报,0,():-. |
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| Spatial and temporal dynamic monitoring of drought based on TVDI: A case study of Shendong Mining area |
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ShAO Tianyi1, BAO Siqin1, WANG Nan2, HAN Aruhan1
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1.Inner Mongolia Agricultural University;2.China University of Geosciences
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| Abstract: |
| 【 Objective 】 To monitor the temporal and spatial changes of drought, which has guiding significance for land reclamation and ecological restoration in Shendong Mining Area. 【 Methods 】 The Landsat data of 36 scenes in 1991, 2002, 2007, 2010, 2014 and 2018 vegetation growing seasons were used to monitor the spatial and temporal dynamics of drought in Shendong Mining Area from 1991 to 2018 based on TVDI remote sensing inversion model. 【 Results 】 (1) The intermonthly variation showed that TVDI had a low value from June to September each year, and the overall UF ~ UB curve was almost less than 0, and TVDI showed a downward trend. The interannual variation shows that the deviation value of TVDI in 1991, 2002 and 2007 is greater than 0, and TVDI shows an upward trend. The deviation value of TVDI in 2014 and 2018 is greater than 0, and TVDI shows a downward trend. The overall variation trend is consistent with the intermonthly variation. (2) TVDI spatial distribution of Shendong Mining Area is always higher in southwest than northeast, and the area of drought grade decreases year by year. (3) That the area with decreasing trend of TVDI in Shendong Mining Area is larger than that with increasing trend of TVDI. The area with decreasing trend of TVDI is 2394.74km2 at most, and the area with increasing trend is 425.91km2 at least. (4) That the dry state of Shendong Mining Area gradually changes to a relatively dry and normal state. The dry state gradually changed to normal and wetter state. The transition to drought and drier conditions is less extensive. 【 Conclusion 】 The monitoring effect of dynamic change of drought situation in Shendong Mining Area based on TVDI model is good and the change is obvious, which can provide reference value for land reclamation in Shendong Mining Area. |
| Key words: Temperature Drought Vegetation Index (TVDI); Temporal and spatial dynamics; The drought; Shendong Mining Area |
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