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中国沙漠 ›› 2024, Vol. 44 ›› Issue (6): 330-341.DOI: 10.7522/j.issn.1000-694X.2024.00152

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20002023年河西走廊-塔克拉玛干沙漠边缘阻击战核心区风蚀起尘量变化

邢瑜1,2(), 柳本立1(), 马涛3, 王伊蒙1,2   

  1. 1.中国科学院西北生态环境资源研究院 干旱区生态安全与可持续发展重点实验室/敦煌戈壁荒漠生态与环境研究站,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
    3.甘肃省水土保持科学研究所,甘肃 兰州 730020
  • 收稿日期:2024-09-23 修回日期:2024-11-05 出版日期:2024-11-20 发布日期:2024-12-06
  • 通讯作者: 柳本立
  • 作者简介:柳本立(E-mail: liubenli@1zb.ac.cn
    邢瑜(1998—),女,甘肃酒泉人,博士研究生,主要从事风蚀模型研究。E-mail: xingyu@nieer.ac.cn
  • 基金资助:
    水利部重大科技专项(SKR-2022053);甘肃省水利科学试验研究与推广项目(23GSLK006)

Wind erosion and dust emission in the core area of Hexi Corridor-Taklimakan Desert edge in 2000-2023

Yu Xing1,2(), Benli Liu1(), Tao Ma3, Yimeng Wang1,2   

  1. 1.Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands / Dunhuang Gobi and Desert Ecology and Environment Research Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.Gansu Institute of Soil and Water Conservation,Lanzhou 730020,China
  • Received:2024-09-23 Revised:2024-11-05 Online:2024-11-20 Published:2024-12-06
  • Contact: Benli Liu

摘要:

基于土壤风蚀预报系统(WEPS)算法,结合多源地理数据,计算了河西走廊-塔克拉玛干沙漠边缘阻击战核心区2000—2023年土壤风蚀及PM10范围,分析其时空变化特征及主要影响因素。结果表明:在研究区总面积80.67万km2内,多年平均风蚀模数为3 553 t·km-2,风蚀高值区集中在塔克拉玛干沙漠东南缘及河西走廊中部。总体上,由于研究区风速下降、植被覆盖度和降水量增加,风蚀模数呈下降趋势,年代下降速率为41 t·km-2,减少区域占总面积的48%。同期,PM10的多年平均释放量为3.11×107 t,平均释放速率为38.53 t·km-2·a-1。在各季节中,春季风蚀模数最高,占年内风蚀总量的47%。风速、植被覆盖度和土壤湿度是关键影响因素,风速对风蚀的贡献率超过90%。

关键词: 河西走廊-塔克拉玛干沙漠边缘, 土壤风蚀, PM10, WEPS

Abstract:

This study utilizes the Wind Erosion Prediction System (WEPS) algorithm, combined with multi-source geographical data, to calculate soil wind erosion and PM10 in the core area of the battle against desertification along the Hexi Corridor-Taklimakan Desert edge since 2000. It analyzes the spatiotemporal variation characteristics and primary influencing factors. The results indicate that within the total study area of 806 700 km2, the multi-year average wind erosion modulus is 3 553 t·km-2, with high wind erosion concentrations observed in the southeastern margin of the Taklamakan Desert and the central Hexi Corridor. Overall, due to decreasing wind speeds, increasing vegetation cover, and increased precipitation in the study area, the wind erosion modulus exhibits a downward trend, with an average decrease rate of 41 t·km-2 per decade, and the area experiencing reduction accounts for 48% of the total. Meanwhile, the annual average PM10 emission is 3.11×107 t, with an average annual rate of 38.53 t·km-2. Among the seasons, spring exhibits the highest wind erosion modulus, accounting for 47% of the annual total. Correlation analysis reveals that wind speed, vegetation cover, and soil moisture are key influencing factors, with wind speed contributing over 90% to wind erosion.

Key words: Hexi Corridor-Taklimakan Desert edge, soil wind erosion, PM10, WEPS

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