Gao Pengwen, Kasim·, Alimujiang, et al. Spatial and Temporal Changes and Driving Forces of Vegetation Coverage in Hami Oasis During 1988-2018[J]. Bulletin of Soiland Water Conservation, 2020, 40(6): 273-280.
DOI:
Gao Pengwen, Kasim·, Alimujiang, et al. Spatial and Temporal Changes and Driving Forces of Vegetation Coverage in Hami Oasis During 1988-2018[J]. Bulletin of Soiland Water Conservation, 2020, 40(6): 273-280. DOI: 10.13961/j.cnki.stbctb.2020.06.039.
Spatial and Temporal Changes and Driving Forces of Vegetation Coverage in Hami Oasis During 1988-2018
[Objective] The temporal and spatial changes and driving forces of vegetation coverage in Hami Oasis in the past 30 years were analyzed in order to provide theoretical reference for the sustainable and healthy development of oasis in this area.[Methods] Based on the 4 images of 1988
1998
2008 and 2018
the vegetation coverage extracted from the AFRISWIR2 index was calculated using the pixel binary model. The vegetation coverage of Hami Oasis was analyzed using the dynamic index and the vegetation coverage transfer matrix. Then
8 influencing factors were detected by the geographic detector
to explore the driving factors of the vegetation coverage of Hami Oasis.[Results] In the past 30 years
the area of Hami Oasis increased from 214 km2 in 1988 to 632.1 km2 in 2018
with increase range of 195%. The development speed was relatively fast
but the level of vegetation coverage in the oasis was low. At the same time
the main expansion area was in the northwest and southeast regions. The development stage was defined as follows:1988-1998 was the low-strength stable period
1998-2008 was the period of extreme expansion
and 2008-2018 was the high-strength stable period.[Conclusion] The change of land use type is the direct cause of the change of vegetation coverage in Hami Oasis. At the same time
in the past 30 years
the influence of human factors on vegetation coverage of Hami Oasis is much higher than natural factors.
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