Sun Yuqing, Yang Xin, Hao Lina. Spatial and temporal Differentiation and Driving Mechanism of Ecological Vulnerability Along Sichuan-Tibet Railway During 2010-2020 Based on SRP Model[J]. Bulletin of Soiland Water Conservation, 2021, 41(6): 201-208.
DOI:
Sun Yuqing, Yang Xin, Hao Lina. Spatial and temporal Differentiation and Driving Mechanism of Ecological Vulnerability Along Sichuan-Tibet Railway During 2010-2020 Based on SRP Model[J]. Bulletin of Soiland Water Conservation, 2021, 41(6): 201-208. DOI: 10.13961/j.cnki.stbctb.2021.06.027.
Spatial and temporal Differentiation and Driving Mechanism of Ecological Vulnerability Along Sichuan-Tibet Railway During 2010-2020 Based on SRP Model
[Objective] The spatial and temporal distribution characteristics of ecological vulnerability along Sichuan-Tibet railway from 2010 to 2020 was explored
and the pattern and spatial correlation of ecological vulnerability was clarified
in order to provide scientific basis for ecological environment protection and sustainable development after construction.[Methods] Taking the Sichuan and Tibet railway (Ya'an-Xinduqiao section) as an example
15 factors closely related to ecological vulnerability were selected based on the field characteristics and SRP model to construct the ecological vulnerability evaluation index system. Spatial principal component analysis (PCA)
spatial autocorrelation
hot spot analysis and geographic detector were used to carry out the research.[Results] ① In terms of spatial and temporal distribution
the overall vulnerability of the study area decreased from west to east
and the ecological status of the study area improved from 2010 to 2020. The severe and extremely vulnerable areas were small
accounting for 3.95% of the total area
and mainly distributed in the junction of Kangding City
Tianquan County and Luding County
which was an alpine zone with the most serious freezing-thawing erosion. ② The distribution of ecological vulnerability in the study area has strong clustering characteristics
with high and low values co-existing. In the west
hot spots are highly concentrated
while in the east
cold spots are highly concentrated. ③ Elevation
average annual temperature and net primary productivity of vegetation were the main factors leading to ecological fragility in the study area.[Conclusion] The construction of the Sichuan-Tibet railway (Ya'an to Xinduqiao section) was greatly affected by precipitation and temperature
and the terrain was complicated. Therefore
attention should be paid to geological disaster prevention and control
environmental protection and ecological maintenance.
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