Monitoring of Vegetation Cover Dynamic in Xinjiang Based on SPOT-VGT Date from 1998 to 2007

DONG Yin; JIAO Li; YANG Guang-hua; ZHAN Li

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Monitoring of Vegetation Cover Dynamic in Xinjiang Based on SPOT-VGT Date from 1998 to 2007

- Monitoring of Vegetation Cover Dynamic in Xinjiang Based on SPOT-VGT Date from 1998 to 2007
- Bulletin of Soiland Water Conservation Vol. 28, Issue 2, Pages: 125-128(2009)
- 作者机构：
  
  1. 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011
  2. 中国科学院研究生院,北京,100049
  4. 新疆师范大学地理科学与旅游学院,新疆,乌鲁木齐,830054
- 作者简介：
- 基金信息：
- DOI：
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- Published：2009
- 稿件说明：
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DONG Yin, JIAO Li, YANG Guang-hua, et al. Monitoring of Vegetation Cover Dynamic in Xinjiang Based on SPOT-VGT Date from 1998 to 2007[J]. Bulletin of Soiland Water Conservation, 2009, 28(2): 125-128.
DOI：

DONG Yin, JIAO Li, YANG Guang-hua, et al. Monitoring of Vegetation Cover Dynamic in Xinjiang Based on SPOT-VGT Date from 1998 to 2007[J]. Bulletin of Soiland Water Conservation, 2009, 28(2): 125-128. DOI：

摘要

利用1998—2007年1 km×1 km的SPOT—VGT数据

采用MVC法和差值法分析了新疆植被覆盖随时间的变化特征。通过-元线性回归法模拟了新疆维吾尔族自治区年最大化NDVI的变化趋势。结果表明

过去10 a间

全疆年均最大化NDVI值略有下降;春季NDVI呈增加趋势

秋季减势显著;7月为年内植被最丰盛期

10 a间NDVI累积增长主要发生在3

6月份

9月份累积减量最大。模拟结果显示

全疆植被改善区域面积小于退化区域面积

植被覆盖整体上呈退化趋势;植被改善幅度较大的主要为绿洲农业区

退化趋势明显的主要为森林、草场分布的山区。

Abstract

The dynamic of vegetation cover in Xinjiang Wei Autonomous Region was analyzed based on 1 kmX 1 km SPOT-VGT data from 1998 to 2007. The MVC method，difference value method were used to analyze the annual，seasonal and monthly NDVI changes. The univariate linear regression of one variable was used to simulate the changing trend of the NDVI values. The results show that from 1998 to 2007，the annual maximum NDVI value declineds slightly in Xinjiang. The NDVI values showed an increasing trend in spring while decrease strikingly in autumn. The maximal NDVI value of a year appears in July in Xinjiang. In the last 10 years，the accumulation of monthly NDVI evidently increased in March，April and June; the maximal decrease was in September. The simulating results indicated that there were some regions where vegetation cover was increasing

but the increasing range was smaller than the decreasing range on the whole. The improved regions of vegetation cover mainly were oasis agriculture areas; the degenerated regions mainly appeared in mountain areas.

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