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Degradation Risk Assessment of Alpine Wetlands in the Upper Reaches of Kaidu RiverChinese Full TextEnglish Full Text (MT)

LI Chao;LI Xuemei;LUO Dongliang;WANG Shaokun;Faculty of Geomatics, Lanzhou Jiaotong University;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring;Northwest Institute of Eco-Environmental Resources, Chinese Academy of Sciences;

Abstract: With the evolution of the natural environment and the disturbance of human activities, the alpine wetlands has been degenerating and even disappeared, which has caused a serious of problems for the ecological environment and socical development. The distribution area of the alpine wetlands in the upper reaches of Kaidu River, Xinjiang was selected as the research area. Using remote sensing images, terrain data and meteorological data, 11 indicators were selected from the perspective of ecosystem stress degree and degradation degree to construct the risk assessment system for degradation of the alpine wetlands in the research area, we evaluated the degradation risk of the alpine wetlands in 2000 and 2018. The results showed that the average stress degree index of the upper reaches of Kaidu River region increased from 0.35 in 2000 to0.37 in 2018, with an increase of 0.06%. The average degradation degree index increased from 0.21 in 2000 to0.32 in 2018, with an increase of 52.4%. The average wetland degradation risk index in the study area increased from 0.28 in 2000 to 0.34 in 2018, with an increase of 21.43%. The area that wetland degradation risk index increased was 2 378.14 km2, accounting for 64.70% of the total area of the study area, which was mostly located in the east and west parts of the Xiaoyouludusi Basin and the Dayouludusi Basin. Compared with those in 2000, the areas of low-risk area transformed into medium-risk area and high-risk area in 2008 were 569.97 km2 and 465.99 km2, respectively. And the area of medium-risk area transformed into high-risk area was 878.98 km2. Beside, the area of the high-risk wetland degradation increased significantly in 2008. In addition, it was indicated that increased population, decreased water conservation, increased degree of landscape fragmentation, poor habitat suitability, reduced net primary productivity and average elasticity all reflected the ecological environment of the alpine wetlands in the study area on the way to the negative.
  • DOI:

    10.13248/j.cnki.wetlandsci.2020.02.006

  • Series:

    (A) Mathematics/ Physics/ Mechanics/ Astronomy; (B) Chemistry/ Metallurgy/ Environment/ Mine Industry

  • Subject:

    Environment Science and Resources Utilization

  • Classification Code:

    X171.1

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