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冰川冻土 ›› 2017, Vol. 39 ›› Issue (1): 61-69.doi: 10.7522/j.issn.1000-0240.2017.0008

• 冰冻圈与全球变化 • 上一篇    下一篇

青藏高原冻融侵蚀敏感性评价与分析

王莉雁1,2, 肖燚1, 江凌1, 欧阳志云1   

  1. 1. 中国科学院 生态环境研究中心 城市与区域生态国家重点实验室, 北京 100085;
    2. 中国科学院大学, 北京 100049
  • 收稿日期:2016-08-04 修回日期:2016-12-06 出版日期:2017-02-25 发布日期:2017-06-03
  • 通讯作者: 肖燚,E-mail:xiaoyi@rcees.ac.cn. E-mail:xiaoyi@rcees.ac.cn
  • 作者简介:王莉雁(1989-),女,山东烟台人,2012年毕业于南京林业大学,现为中国科学院生态环境研究中心在读博士研究生,从事生态系统服务功能评估研究.E-mail:wangliyan15010@126.com
  • 基金资助:
    国家重点研发计划项目(2016YFC0502102)资助

Assessment and analysis of the freeze-thaw erosion sensitivity on the Tibetan Plateau

WANG Liyan1,2, XIAO Yi1, JIANG Ling1, OUYANG Zhiyun1   

  1. 1. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-08-04 Revised:2016-12-06 Online:2017-02-25 Published:2017-06-03

摘要: 冻融侵蚀是我国仅次于水蚀和风蚀的土壤侵蚀类型。青藏高原由于其海拔高、辐射强、气温低的特点,是我国冻融侵蚀较严重的区域。选择影响冻融侵蚀的5个主要因子:气温年较差、降水量、坡度、坡向、植被覆盖度进行定量研究,分析青藏高原冻融侵蚀敏感性强度及空间分布特征。结果表明:(1)青藏高原冻融侵蚀区面积为149.02×104 km2,占青藏高原总面积的62.20%;冻融侵蚀敏感区的面积为56.80×104 km2,中度及以上敏感区面积为27.39×104 km2,占冻融侵蚀敏感区面积的48.22%;(2)冻融侵蚀敏感性空间分布差异明显,中度以上敏感区主要分布在青藏高原南部和东南部、喀喇昆仑山、祁连山、横断山区等地区。

关键词: 冻融侵蚀, 敏感性评价, ArcGIS, 青藏高原

Abstract: Following the water erosion and wind erosion, freeze-thaw erosion is the third strong soil erosion in China. The Tibetan Plateau is a severe freeze-thaw erosion area owing to its high altitude, strong radiation and low temperature. Five indices are chosen to assess freeze-thaw erosion. They are annual range of temperature, annual precipitation, slope, slope aspect and vegetation coverage. The results show:(1) The distribution of freeze-thaw erosion is very extensive in the Tibetan Plateau, with the freeze-thaw erosion area of 149.02×104 km2, accounting for 62.20% of the total area of the Tibetan Plateau. Freeze-thaw erosion sensitive area is 56.80×104 km2, among which moderate and more sensitive area is 27.39×104 km2, accounting for 48.22% of the total freeze-thaw erosion sensitive area in the Tibetan Plateau; (2) The regional differentiation of freeze-thaw erosion sensitivity is obvious. Different intensities of freeze-thaw erosion sensitivity appear in different regions. The sensitivity is heavy in south and southeast of the plateau, Karakoram Mountains, Qilian Mountains, and Hengduan Mountains.

Key words: freeze-thaw erosion, sensitivity assessment, ArcGIS, Tibetan Plateau

中图分类号: 

  • S157