Influence of Hydrothermal Condition and Human Activities on Dynamics of Vegetation Coverage in Shanxi Province

ZHANG Jia-qi; REN Zhi-yuan; ZHANG Chong

doi:10.13961/j.cnki.stbctb.2014.04.038

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Influence of Hydrothermal Condition and Human Activities on Dynamics of Vegetation Coverage in Shanxi Province

- Influence of Hydrothermal Condition and Human Activities on Dynamics of Vegetation Coverage in Shanxi Province
- Bulletin of Soiland Water Conservation Vol. 33, Issue 4, Pages: 128-133(2014)
- 作者机构：
  
  陕西师范大学旅游与环境学院,陕西,西安,710119
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.04.038
  CLC：
- Published：2014
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ZHANG Jia-qi, REN Zhi-yuan, ZHANG Chong. Influence of Hydrothermal Condition and Human Activities on Dynamics of Vegetation Coverage in Shanxi Province[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 128-133.
DOI：

ZHANG Jia-qi, REN Zhi-yuan, ZHANG Chong. Influence of Hydrothermal Condition and Human Activities on Dynamics of Vegetation Coverage in Shanxi Province[J]. Bulletin of Soiland Water Conservation, 2014, 33(4): 128-133. DOI： 10.13961/j.cnki.stbctb.2014.04.038.

摘要

基于山西省1999-2010年的SPOT Vegetation数据及气象资料

运用Sen趋势度+Mann-Kendall法、残差分析法和相关分析法

对山西省近12 a植被覆盖的时空变化进行了分析

探讨了水热条件与人类活动对植被覆盖变化的影响。从年际变化来看

1999-2010年山西省生长季植被NDVI呈现显著上升趋势

其增加速率为0.199 4/a;从空间格局来看

大部分地区NDVI有增加趋势

其中极显著增加的区域占72.94%

主要分布在山西省的黄土丘陵沟壑区及山区;NDVI减少区域极小

仅占0.21%

呈不均匀零星分布。降水量与生长季NDVI的相关性较高

从整体上呈现出由北向南逐渐减少的特点

其中98.54%的区域呈正相关关系;此外

气温与生长季NDVI的相关性较低

平均相关系数仅为-0.415。人类活动对山西省植被覆盖变化的正面和负面作用并存

但正影响远大于负影响

说明近年来退耕还林草以及水土流失治理的生态效益正在显现。

Abstract

Base on the SPOT Vegetation and meteorological data from 1999 to 2010

the spatial and temporal variations of vegetation cover in Shanxi Province were analyzed by the methods of Sen+Mann-Kendall

residual analysis and correlation analysis to discuss the effects of hydrothermal condition and human activities on dynamics of vegetation coverage. The results showed that

from the perspective of the interannual variation

the vegetation coverage in Shanxi Province presented a significant increasing trend and the growth rate reached 0.199 4/a during 1999-2010. From the perspective of the spatial pattern

the NDVI had an increasing trend in most of the study area. The significant increasing areas located mainly in the loess hilly-gully region and mountains in Shanxi Province

which accounted for 72.94%; the areas where the NDVI reduces ws distributed sporadically

which only accounts for 0.21%. The change of vegetation coverage had great correlation with precipitation

and on the whole

it showed an obvious feature that gradually reducing from north to south

among them

the areas where the correlation coefficient was positive accounts for 98.54%; besides

the change of vegetation coverage had little correlation with temperature

and the average correlation coefficient was only -0.415. In addition

the impact of human activities on the vegetation cover change in Shanxi Province was double-edged sword

but positive influence was far greater than negative effect

which indicates that returning the grain plots to forestry and soil erosion controlling brought an important ecological benefit role in recent years.

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