ISSN 1003-8035 CN 11-2852/P
    车鑫倩,倪万魁,牛富俊,等. 基于改进RWEQ的青藏高原冻融风蚀性评价及影响因素分析[J]. 中国地质灾害与防治学报,2024,35(0): 1-12. DOI: 10.16031/j.cnki.issn.1003-8035.202404015
    引用本文: 车鑫倩,倪万魁,牛富俊,等. 基于改进RWEQ的青藏高原冻融风蚀性评价及影响因素分析[J]. 中国地质灾害与防治学报,2024,35(0): 1-12. DOI: 10.16031/j.cnki.issn.1003-8035.202404015
    CHE Xinqian,NI Wankui,NIU Fujun,et al. Evaluation of freeze-thaw wind erosion and analysis of influencing factors on the Tibetan Plateau based on the improved RWEQ[J]. The Chinese Journal of Geological Hazard and Control,2024,35(0): 1-12. DOI: 10.16031/j.cnki.issn.1003-8035.202404015
    Citation: CHE Xinqian,NI Wankui,NIU Fujun,et al. Evaluation of freeze-thaw wind erosion and analysis of influencing factors on the Tibetan Plateau based on the improved RWEQ[J]. The Chinese Journal of Geological Hazard and Control,2024,35(0): 1-12. DOI: 10.16031/j.cnki.issn.1003-8035.202404015

    基于改进RWEQ的青藏高原冻融风蚀性评价及影响因素分析

    Evaluation of freeze-thaw wind erosion and analysis of influencing factors on the Tibetan Plateau based on the improved RWEQ

    • 摘要: 冻融风蚀是指气温变化导致地表结构发生变化的过程,对地表地貌的形成和土壤的性质产生重要影响。然而,青藏高原地区的特殊性和复杂性使得冻融风蚀研究尚未得到广泛关注。针对青藏高原冻融风蚀定量化分析研究相对较少,本文采用引入冻结N因子的修正风蚀方程模型(Revised Wind Erosion Equation,RWEQ),分析2022年青藏高原冻融风蚀量的分布特征,并对青藏高原进行冻融风蚀强度分级。结果表明:①青藏高原冻融风蚀模数为8.90×108~4.95×105 (t·km−2·a−1),冻融风蚀总量为2.87×1013 t,冻融风蚀总面积2.41×106 km2;②青藏高原轻度以上冻融风蚀占全部冻融风蚀面积的84.26%,说明青藏高原冻融风蚀以轻微和轻度为主;③5个因子的显著性检验结果均为显著,对青藏高原冻融风蚀模数影响程度排序为气象因子>土壤结皮因子>土壤可蚀性因子>地表粗糙度因子>植被覆盖度因子。本研究不仅为青藏高原地区的环境保护和可持续发展提供了基础资料和实践参考,而且通过模型的应用,还为其他具有类似气候和地理特征的地区在冻融风蚀研究方面提供了多元方法和经验。

       

      Abstract: Freeze-thaw wind erosion refers to the process in which temperature fluctuations cause changes in the surface structure, significantly impacting on the formation of surface landform and soil properties. However, due to the particularity and complexity of the Tibetan Plateau, the study of freeze-thaw wind erosion has not received widespread attention. Due to the relative scarcity of quantitative studies on the freeze-thaw wind erosion on the Tibetan Plateau, this study utilizes a Revised Wind Erosion Equation (RWEQ) that incorporates a freezing N-factor to analyze the distribution characteristics of freeze-thaw wind erosion on the Tibetan Plateau in 2022. The study also categorizes the intensity of freeze-thaw wind erosion across the Tibetan Plateau. The results indicate: (1) The freeze-thaw wind erosion modulus on the Qinghai- Tibet Plateau ranges from 8.90×108 to 4.95×105 (t·km−2·a−1), with a total erosion amount of 2.87×1013 t and a total affected area of 2.41×10 km2; (2) Moderate or greater freeze-thaw wind erosion accounts for 84.26% of the total affected area, indicating that light and mild erosion are predominant. (3) The significance tests of the five factors were all significant, and the influence of the freezing-thawing wind erosion modulus on the Qinghai-Tibet Plateau was ranked as meteorological factors > soil crust factors > soil erodibility factors > surface roughness factors>vegetation coverage factors. This study not only provides foundational data and practical references for environmental protection and sustainable development in the Qinghai-Tibet Plateau, but also offers a diverse range of methods and experiences for studying freeze-thaw wind erosion in other regions with similar climatic and geographical characteristics through the application of the model.

       

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