地理学报 ›› 2019, Vol. 74 ›› Issue (3): 504-519.doi: 10.11821/dlxb201903008

• 气候变化与地表过程 • 上一篇    下一篇

2001-2015年中国植被覆盖人为影响的时空格局

王建邦1(), 赵军1(), 李传华1, 朱钰2, 康重阳1, 高超1   

  1. 1. 西北师范大学地理与环境科学学院, 兰州 730070
    2. 云南大学国际河流与生态安全研究院, 昆明 650500
  • 收稿日期:2017-12-08 修回日期:2018-12-07 出版日期:2019-03-25 发布日期:2019-03-19
  • 作者简介:

    王建邦(1991-), 男, 四川广元人, 硕士生, 研究方向为环境遥感与GIS应用。E-mail: jayden_fykx@outlook.com

  • 基金资助:
    国家自然科学基金项目(41661084;41761083);National Natural Science Foundation of China, No.41261016;No.41761083

The spatial-temporal patterns of the impact of human activities on vegetation coverage in China from 2001 to 2015

Jianbang WANG1(), Jun ZHAO1(), Chuanhua LI1, Yu ZHU2, Chongyang KANG1, Chao GAO1   

  1. 1. College of Geography and Environment Sciences, Northwest Normal University, Lanzhou 730070, China
    2. Institute of International Rivers and Eco-security, Yunnan University, Kunming 650500, China
  • Received:2017-12-08 Revised:2018-12-07 Online:2019-03-25 Published:2019-03-19

摘要:

基于MODIS-NDVI和气温、降水数据,使用基于变异系数的人为影响模型定量计算了2001-2015年中国植被覆盖人为影响,辅以趋势分析、Hurst指数等方法探讨了中国植被覆盖人为影响的时空变化特征及未来演变趋势。研究发现:① 2001-2015年,中国植被覆盖人为影响由南向北空间分异愈发明显,年均值为-0.0102,植被覆盖在人类活动影响下轻微减少,负影响面积占51.59%,略大于正影响面积。② 中国植被覆盖人为影响年际变化特征明显,整体呈负影响波动减少趋势,降速为0.5%/10a,其中正影响、负影响均呈增大趋势,正影响增速(0.3%/10a)远大于负影响(0.02%/10a)。③ 2001-2015年间,中国植被覆盖人为正影响重心向东北方向移动,负影响重心向西南方向移动,东北部植被覆盖在人为影响下不断改善,西南部人类活动对植被破坏程度不断增大。④ 中国植被覆盖人为影响主要呈负影响减少和正影响增大趋势,面积占比分别为28.14%和25.21%,生态环境趋于改善。⑤ Hurst指数分析表明,中国植被覆盖人为影响未来演变趋势的反向特征强于正向特征,主要呈人为负影响先减少后增大趋势,面积占比15.59%。

关键词: 植被覆盖, 人为影响, 空间分布, 变化趋势

Abstract:

Based on MODIS-NDVI and climate data, using an artificial influence model based on coefficient of variation to quantitatively calculate the human impact of vegetation cover(NDVIH) in China from 2001 to 2015, Sen+Mann-Kendall model and Hurst index were used to analyze the spatial-temporal feature and the future trends. It was found that: (1) In the year from 2001 to 2015, the Spatial Differentiation of NDVIH in China was more obvious from southern part to northern part, with an average annual mean value of -0.0102, the vegetation coverage decreased slightly under human activities, the negative impact area accounting for 51.59% which is slightly larger than the positive impact area. (2) The interannual variation of NDVIH in China is obvious, showing the negative impact volatility decreased, the rate of decline is 0.5%/10a; among which the positive and negative effects all showed an increasing trend, the positive growth rate (0.3%/10a) is much larger than the negative impact (0.02%/10a). (3) During 2001-2015, the center of gravity of positive impact has moved to the northeast, the center of gravity of negative impact has moved to the southwest, vegetation cover in northeastern China has improved under the influence of mankind, and human activities in the southwest have increased the degree of vegetation destruction. (4) The proportion of "negative impact reduction" and "positive impact increase" trend of NDVIH in China appeared to be the largest which accounting for 28.14% and 25.21% of the total, and the ecological environment is improving. (5) The reverse characteristics of NDVIH change were stronger than the same characteristic in China, mainly showed a negative impact which decreased at the first and then increased with the rate of 15.59% of the total area.

Key words: vegetation cover, human impact, spatial distribution, trend