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中国沙漠 ›› 2006, Vol. 26 ›› Issue (2): 165-171.

• 研究论文 • 上一篇    下一篇

雨影区对海南岛西部土地沙漠化影响的风洞实验研究

李 森1, 刘贤万2, 孙 武3   

  1. 1.佛山大学 资源与环境科学研究所, 广东 佛山 528000; 2.中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000; 3.华南师范大学 地理科学学院, 广东 广州 510631
  • 收稿日期:2005-02-25 修回日期:2005-03-31 出版日期:2006-03-20 发布日期:2006-03-20

Study of Influence of Rain Shadow Region on Sandy Desertification in West of Hainan Island based on Wind Tunnel Experiments

LI Sen1, LIU Xian-wan2, SUN Wu3   

  1. 1.The Resources and Environmental Science Research Institute, Foshan University, Foshan 528000, Guangdong, China; 2.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 3.College of Geography, South China Normal University, Guangzhou 510631, China
  • Received:2005-02-25 Revised:2005-03-31 Online:2006-03-20 Published:2006-03-20

摘要: 风洞系列实验证明,山体雨影区与垂直平板绕流后回流区的作用原理是一致的, 山体雨影区的宽度是山体高度的15 H。据实验结果分析,海南岛西部雨影区形成的原因是季风气流沿山脉迎风坡面爬升冷却,坡脚形成热低压,在背风面回流收敛形成暖高压,气流变性为焚风。海南岛中南部多道山脉的雨影区和中南半岛长山山脉雨影区叠加、交汇后,强化了海南岛西部的干热化并形成热带半干旱气候环境,始终影响着土地沙漠化发展演变。

关键词: 海南岛西部, 雨影区, 干热化, 焚风效应, 土地沙漠化

Abstract: According to a serial of wind tunnel experiments, it can be proved that mountain rain shadow region has same effect principle as reflow region of airflow over a vertical plane plate, and it is reasonable to calculate the width of mountain rain shadow region according to 15 H of the height of the mountain in Hainan Island. The cause of the formation of rain shadow region in west of Hainan Island is that monsoon airflow cooled while climbing on windward slope and a hot low-pressure formed at the foot of the slope; and it reflows into warm high-pressure on leeward side, then the airflow turn into foehn. The rain shadow regions of four Mountains in mid-south of Hainan Island and Changshan Mountain in Indo-China Peninsula join together, and the effect of superposition intensifies xerothermic process in west of Hainan Island, results in tropical semi-arid climate and affects the development of sandy desertification whenever in geologic time, historic time or nowadays.

Key words: the west of Hainan Island, rain shadow region, dry-hot wind, foehn effect, sandy desertification land

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