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Ecological Evaluation of Land Resources in the Yangtze River Delta Region by Remote Sensing Observation

Author

Listed:
  • Yanlong Guo

    (Social Innovation Design Research Center, Anhui University, Hefei 203106, China)

  • Peiyu He

    (Social Innovation Design Research Center, Anhui University, Hefei 203106, China)

  • Pengyu Chen

    (Social Innovation Design Research Center, Anhui University, Hefei 203106, China)

  • Linfu Zhang

    (Faculty of Arts and Social Sciences, Lancaster University, Lancaster LA1 4 YW, UK)

Abstract

The evaluation of land ecological security (LES) evaluates how human activity and land use affect land ecosystems. Its ultimate objective is to provide guidance and assistance for decision making in order to preserve and restore the efficacy and health of terrestrial ecosystems. The assessment model presented in this article is comprehensive and integrates the advantages of both subjective and objective weighting techniques. This study extends the “Pressure–State–Response” (PSR) model to “Driver–Pressure–State-Impact–Response” (DPSIR) and combines it with TOPSISI to determine the weights of each contributing component. Furthermore, the geographical and temporal distribution patterns of regional land ecological security levels were investigated using GIS geostatistical approaches. According to this study, (1) the Yangtze River Delta region’s LES index, with a mean value in the fairly safe range, is generally safe. The year 2019 marks an inflection point for the index, with the highest level of ecological safety on land. The primary element is the modification of environmental policies that are enacted by the government. (2) The LES status is divided into two stages during the course of this study. The Yangtze River Delta region’s LES quickly develops throughout the first stage (2012–2019), which sees a shift in the safety rating from IV to II. The second stage (2019–2023) sees a progressive improvement in the LES index and a shift in the safety category from Class II to Class I. (3) Important variables influencing the geographical distribution of LES in the Yangtze River Delta region include barrier elements, including soil and water erosion areas, flood disaster areas, grain planting areas, urban green covering areas, and effective irrigation areas of farmland.

Suggested Citation

  • Yanlong Guo & Peiyu He & Pengyu Chen & Linfu Zhang, 2024. "Ecological Evaluation of Land Resources in the Yangtze River Delta Region by Remote Sensing Observation," Land, MDPI, vol. 13(8), pages 1-18, July.
    • Handle: RePEc:gam:jlands:v:13:y:2024:i:8:p:1155-:d:1444501
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    References listed on IDEAS

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