[1]HOU Liqin,ZHANG Jin.Spatiotemporal Variation of Surface Soil Moisture Based on Temperature Vegetation Dryness Index (TVDI) in Qinshui Coalfield[J].Research of Soil and Water Conservation,2017,24(03):177-182.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 03
Page number:
177-182
Column:
Public date:
2017-06-28
- Title:
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Spatiotemporal Variation of Surface Soil Moisture Based on Temperature Vegetation Dryness Index (TVDI) in Qinshui Coalfield
- Author(s):
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HOU Liqin, ZHANG Jin
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College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, China
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- Keywords:
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soil moisture; normalized difference vegetation index (NDVI); temperature vegetation dryness index (TVDI); space distribution; Qinshui coalfield
- CLC:
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S152.7;TP79
- DOI:
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- Abstract:
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Temperature Vegetation Dryness Index (TVDI) is a valid indicator to reflect the surface drought. TVDI and the spatiotemporal variation of soil moisture are research topics of global environmental change and the surface soil drought. The variation affects the surface cover change. This method can be used to research the change of ecological environment in coal-field. Taking Qinshui coalfield, Shanxi Province, as an example, combining MODND1M and MODLT1M data of 2000—2010, we built NDVI-Ts feature space and analyzed the dry and wet edges. According to TVDI, the spatiotemporal and variation characteristics of soil moisture were studied. The results showed that the soil moisture of coal surface increased in the past 11 years, and in 2005 before and after the change was bigger. Within the year, monthly average the temperature vegetation dryness index was at around 0.5, and it was obvious fluctuation in July. In space, the distribution of soil moisture was consistent with vegetation distribution in the study area. The two characteristics were basically identical. Coalfield gives priority to arid and extremely arid in the north and east, the southern and eastern mountainous areas were given priority to arid and extreme drought. Simultaneously, in the northwest mountainous areas, soil moisture was mainly normal or moist. The content of soil moisture in mined-out areas was significantly lower than the other regions. The drought phenomenon near the mine is more prominent than distant region.