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High-Resolution Dynamic Monitoring of Rocky Desertification of Agricultural Land Based on Spatio-Temporal Fusion

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  • Xin Zhao

    (School of Geography and Environmental Science/School of Karst Science, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guiyang 550025, China)

  • Zhongfa Zhou

    (School of Geography and Environmental Science/School of Karst Science, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guiyang 550025, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550025, China)

  • Guijie Wu

    (School of Geography and Environmental Science/School of Karst Science, Guizhou Normal University, Guiyang 550025, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550025, China)

  • Yangyang Long

    (School of Geography and Environmental Science/School of Karst Science, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guiyang 550025, China)

  • Jiancheng Luo

    (Key Laboratory of Remote Sensing and Digital Earth, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China)

  • Xingxin Huang

    (School of Geography and Environmental Science/School of Karst Science, Guizhou Normal University, Guiyang 550025, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550025, China)

  • Jing Chen

    (School of Geography and Environmental Science/School of Karst Science, Guizhou Normal University, Guiyang 550025, China
    State Engineering Technology Institute for Karst Desertification Control, Guiyang 550025, China)

  • Tianjun Wu

    (School of Land Engineering, Chang’an University, Xi’an 710064, China)

Abstract

The current research on rocky desertification primarily prioritizes large-scale surveillance, with minimal attention given to internal agricultural areas. This study offers a comprehensive framework for bedrock extraction in agricultural areas, employing spatial constraints and spatio-temporal fusion methodologies. Utilizing the high resolution and capabilities of Gaofen-2 imagery, we first delineate agricultural land, use these boundaries as spatial constraints to compute the agricultural land bedrock response Index (ABRI), and apply the spatial and temporal adaptive reflectance fusion model (STARFM) to achieve spatio-temporal fusion of Gaofen-2 imagery and Sentinel-2 imagery from multiple time periods, resulting in a high-spatio-temporal-resolution bedrock discrimination index (ABRI*) for analysis. This work demonstrates the pronounced rocky desertification phenomenon in the agricultural land in the study area. The ABRI* effectively captures this phenomenon, with the classification accuracy for the bedrock, based on the ABRI* derived from Gaofen-2 imagery, reaching 0.86. The bedrock exposure area in the farmland showed a decreasing trend from 2019 to 2021, a significant increase from 2021 to 2022, and a gradual decline from 2022 to 2024. Cultivation activities have a significant impact on rocky desertification within agricultural land. The ABRI significantly enhances the capabilities for the dynamic monitoring of rocky desertification in agricultural areas, providing data support for the management of specialized farmland. For vulnerable areas, timely adjustments to planting schemes and the prioritization of intervention measures such as soil conservation, vegetation restoration, and water resource management could help to improve the resilience and stability of agriculture, particularly in karst regions.

Suggested Citation

  • Xin Zhao & Zhongfa Zhou & Guijie Wu & Yangyang Long & Jiancheng Luo & Xingxin Huang & Jing Chen & Tianjun Wu, 2024. "High-Resolution Dynamic Monitoring of Rocky Desertification of Agricultural Land Based on Spatio-Temporal Fusion," Land, MDPI, vol. 13(12), pages 1-22, December.
  • Handle: RePEc:gam:jlands:v:13:y:2024:i:12:p:2173-:d:1543202
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    References listed on IDEAS

    as
    1. Shiwen Zhang & Yan Wang & Xuehua Wang & Yang Wu & Chengrong Li & Chao Zhang & Yuhang Yin, 2022. "Ecological Quality Evolution and Its Driving Factors in Yunnan Karst Rocky Desertification Areas," IJERPH, MDPI, vol. 19(24), pages 1-19, December.
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