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中国沙漠 ›› 2025, Vol. 45 ›› Issue (4): 227-240.DOI: 10.7522/j.issn.1000-694X.2025.00083

• • 上一篇    

科尔沁沙地防风固沙服务时空变化

张慧琳1,2(), 王卫国3(), 薄一览1, 晋子振1   

  1. 1.忻州师范学院 地理系,山西 忻州 034000
    2.山西大学 黄土高原研究所,山西 太原 030006
    3.山西师范大学 地理科学学院,山西 太原 030031
  • 收稿日期:2025-05-12 修回日期:2025-06-16 出版日期:2025-07-20 发布日期:2025-08-18
  • 通讯作者: 王卫国
  • 作者简介:张慧琳(1993—),女,山西大同人,在读博士研究生,讲师,主要从事生态系统服务流变化。E-mail: zhanghlmm@163.com
  • 基金资助:
    山西省基础研究计划(自由探索类)青年项目(202303021222182);山西省基础研究计划(自由探索类)青年项目(202403021212316);山西省哲学社会科学规划课题(2023YJ055)

Spatiotemporal dynamics of wind erosion prevention and sand fixation service in the Horqin Sandy Land

Huilin Zhang1,2(), Weiguo Wang3(), Yilan Bo1, Zizhen Jin1   

  1. 1.Department of Geography,Xinzhou Teachers University,Xinzhou 034000,Shanxi,China
    2.Institute of Loess Plateau,Shanxi University,Taiyuan 030006,China
    3.College of Geographical Sciences,Shanxi Normal University,Taiyuan 030031,China
  • Received:2025-05-12 Revised:2025-06-16 Online:2025-07-20 Published:2025-08-18
  • Contact: Weiguo Wang

摘要:

科尔沁沙地土地沙化严重,研究其防风固沙服务的时空演变规律对区域生态安全与可持续发展具有重要意义。本研究利用修正风蚀方程(RWEQ)模型、XGBoost-SHAP、HYSPLIT(Hybrid Single-Particle Lagrangian Integrated Trajectory Model)等方法,系统分析了2000—2020年科尔沁沙地防风固沙服务时空演变、驱动机制。结果表明:(1)科尔沁沙地防风固沙服务呈现显著的时空异质性特征,单位面积固沙量呈先降后升态势,空间格局表现为中南高、北部低的分异特征。(2)XGBoost-SHAP模型显示,植被覆盖度是实际风蚀作用的核心驱动因子,而风速、降水与气温气象要素通过非线性作用影响风蚀过程。(3)HYSPLIT模拟揭示2000—2020年共产生3 559条风沙传输路径,轨迹数量整体下降,表明固沙能力提升。聚类分析识别出4条主导路径:31.67%向东入太平洋,29.92%向东北影响吉林省和黑龙江省,20.46%跨境扩散至朝鲜、日本等区域,17.95%南下抵达东南沿海。本文研究结果可为优化沙地治理策略、协调区域生态补偿机制提供科学依据,同时为干旱半干旱区生态系统服务流动研究提供方法参考。

关键词: 防风固沙服务, HYSPLIT, XGBoost-SHAP, 科尔沁沙地

Abstract:

The Horqin Sandy Land suffers from severe land desertification. Research into the spatiotemporal evolution patterns of the wind erosion prevention and sand fixation service holds significant importance for regional ecological security and sustainable development. This study systematically analyzed the spatiotemporal dynamics, driving mechanisms of wind erosion prevention and sand fixation service in the Horqin Sandy Land from 2000 to 2020 using the Revised Wind Erosion Equation (RWEQ) model, the XGBoost-SHAP algorithm, and HYSPLIT trajectory simulations. The results indicate: (1) The wind erosion prevention and sand fixation service exhibited significant spatiotemporal heterogeneity. The sand fixation per unit area showed a trend of initial decrease followed by increase, with a spatial pattern characterized by a higher in the central-southern regions and lower in the northern areas. (2) The XGBoost-SHAP model quantified vegetation coverage as the core driving factor, while interactions among wind days, precipitation, and temperature nonlinearly influenced wind erosion processes. (3) HYSPLIT simulations identified 3 559 sand transport trajectories over the 20-year period, with an overall decline in trajectory frequency, indicating enhanced sand fixation capacity. Cluster analysis revealed four dominant pathways: 31.67% of trajectories moved eastward into the Pacific Ocean, 29.92% influenced northeastern regions (Jilin and Heilongjiang), 20.46% crossed borders to areas such as North Korea and Japan, and 17.95% migrated southward to China’s southeastern coast. These findings provide a scientific basis for optimizing desertification control strategies and coordinating regional ecological compensation mechanisms, while offering methodological references for studying ecosystem service flows in arid and semi-arid regions.

Key words: wind erosion prevention and sand fixation service, HYSPLIT model, XGBoost-SHAP model, Horqin Sandy Land

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