Earth Science Frontiers ›› 2021, Vol. 28 ›› Issue (4): 229-237.DOI: 10.13745/j.esf.sf.2020.10.19

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Application of data mining algorithm in correlation analysis of the driving factors for alpine grassland degradation

MA Rongrong1(), YANG Guozhu2, HU Yueming3, ZHOU Wei1,4,5,*()   

  1. 1. School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
    2. College of Eco-Environmental Engineering, Qinghai University, Xining 810016, China
    3. College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
    4. Key Laboratory of Land Consolidation and Rehabilitation, Ministry of Natural Resources, Beijing 100035, China
    5. Technology Innovation Center for Ecological Restoration Engineering in Mining Area, Ministry of Natural Resources, Beijing 100083, China
  • Received:2020-09-29 Revised:2020-12-06 Online:2021-07-25 Published:2021-07-25
  • Contact: ZHOU Wei

Abstract:

The degradation of alpine grassland is affected by a range of natural and human activities, and the coupling relationship between degradation and its driving factors is complex. To study the relationship between the influencing factors and indicators for alpine grassland degradation, this paper refers to Duo County as the research area, extracts the NDVI time series data from 2005 to 2014, combines the temperature, precipitation and socio-economic factors, and uses the data mining-based lift caluation in the correlation analysis. The relationships between the three levels of NDVI, food availability or plant height and the corresponding temperature, precipitation, rodent or grazing intensity were examined, so as to more accurately analyze the contribution rate of each driving factor to different grades of grassland degradation. The conclusions are: (1)The low vegetation coverage in grassland is negatively correlated with temperature and precipitation. (2)The low food availability in grassland is negatively correlated with temperature and population, and positively correlated with livestock. (3)The low plant height is positively correlated with livestock.

Key words: NDVI, data mining, lift calculation, correlation analysis, alpine grassland, degradation index

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