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Analysis of morphological characteristics of gravels based on digital image processing technology and self-organizing map

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Abstract

A comprehensive understanding of spatial distribution and clustering patterns of gravels is of great significance for ecological restoration and monitoring. However, traditional methods for studying gravels are low-efficiency and have many errors. This study researched the spatial distribution and cluster characteristics of gravels based on digital image processing technology combined with a self-organizing map (SOM) and multivariate statistical methods in the grassland of northern Tibetan Plateau. Moreover, the correlation of morphological parameters of gravels between different cluster groups and the environmental factors affecting gravel distribution were analyzed. The results showed that the morphological characteristics of gravels in northern region (cluster C) and southern region (cluster B) of the Tibetan Plateau were similar, with a low gravel coverage, small gravel diameter, and elongated shape. These regions were mainly distributed in high mountainous areas with large topographic relief. The central region (cluster A) has high coverage of gravels with a larger diameter, mainly distributed in high-altitude plains with smaller undulation. Principal component analysis (PCA) results showed that the gravel distribution of cluster A may be mainly affected by vegetation, while those in clusters B and C could be mainly affected by topography, climate, and soil. The study confirmed that the combination of digital image processing technology and SOM could effectively analyzed the spatial distribution characteristics of gravels, providing a new mode for gravel research.

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Acknowledgements

This study was funded by the National Natural Science Foundation of China (41971226, 41871357), the Major Research and Development and Achievement Transformation Projects of Qinghai, China (2022-QY-224), and the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA28110502, XDA19030303).

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Authors and Affiliations

  1. College of Earth Science, Chengdu University of Technology, Chengdu, 610059, China

    Tao Xu, Huan Yu & Qing Xiang

  2. Beijing SuperMap Software Co., Ltd., Beijing, 100015, China

    Tao Xu

  3. Sichuan Real Estate Registration Center, Chengdu, 610014, China

    Xia Qiu

  4. Chengdu Institute of Mountain Land and Disasters, Chinese Academy of Sciences, Chengdu, 610041, China

    Bo Kong

  5. School of Earth Systems and Sustainability, Southern Illinois University Carbondale, Carbondale, IL, 62901, United States of America

    Xiaoyu Xu

  6. Environmental Resources and Policy, Southern Illinois University Carbondale, Carbondale, IL, 62901, United States of America

    Xiaoyu Xu

  7. Sichuan Institute of Land and Space Ecological Restoration and Geohazard Prevention, Chengdu, 610081, China

    Hao Fu

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Xu, T., Yu, H., Qiu, X. et al. Analysis of morphological characteristics of gravels based on digital image processing technology and self-organizing map. J. Arid Land 15, 310–326 (2023). https://doi.org/10.1007/s40333-023-0010-y

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