Remote Sensing Monitoring of Vegetation Cover Change in Tarim River Basin

GUAN Wenke; WEI Hong; ZHONG Jiahua; HUO Aidi; DU Weihong; ZHENG Xiaolu

doi:10.13961/j.cnki.stbctb.2018.05.039

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Remote Sensing Monitoring of Vegetation Cover Change in Tarim River Basin

- Remote Sensing Monitoring of Vegetation Cover Change in Tarim River Basin
- Bulletin of Soiland Water Conservation Vol. 38, Issue 5, Pages: 244-248(2018)
- 作者机构：
  
  1. 新疆林业科学院,新疆,乌鲁木齐,830002
  2. 长安大学旱区地下水与生态效应教育部重点实验室,陕西,西安,710054
  3. 长安大学环境科学与工程学院,陕西,西安,710054
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.05.039
  CLC： X821
- Published：2018
- 稿件说明：
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GUAN Wenke, WEI Hong, ZHONG Jiahua, et al. Remote Sensing Monitoring of Vegetation Cover Change in Tarim River Basin[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 244-248.
DOI：

GUAN Wenke, WEI Hong, ZHONG Jiahua, et al. Remote Sensing Monitoring of Vegetation Cover Change in Tarim River Basin[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 244-248. DOI： 10.13961/j.cnki.stbctb.2018.05.039.

摘要

[目的]对塔里木河流域植被恢复成效及发展趋势进行定量分析，为流域生态治理提供基础研究依据。[方法]基于2007—2017年MODIS-MOD13 Q1多光谱遥感资料，以EVI （enhanced vegetation index）植被指数为切入点，综合运用ArcGIS等软件平台，沿塔里木河两岸设立监测区域并构建植被覆盖度时间序列模型，对塔里木河流域植被的变化规律进行动态监测及趋势分析。[结果]①塔里木河流域植被覆盖基数低，且不同河段植被状况差异大，2017年干流植被覆盖度最高仅为23.56%，上游段植被覆盖最高可达下游段的3.36倍，上游植被覆盖度年内极值比达4.28； ②2017年塔里木河流域全年植被覆盖水平相比2007年无显著差异，其未来的生态环境演变时间序列模型呈现出良性趋势； ③NDVI指数与EVI指数的监测结果无显著差异，但NDVI在高植被区易出现饱和现象，在低植被区容易偏低估计。[结论]塔里木河流域当前植被覆盖保持稳定，未来生态环境有好转趋势，基于EVI指数对植被恢复成效的动态监测与定量分析是可行的。

Abstract

[Objective] To analyze the vegetation restoration effectiveness and development trends in the Tarim River basin in order to provide research basis for the ecological management of the basin.[Methods] Based on MODIS-MOD13 Q1 multi-spectral remote sensing data from 2007 to 2017

EVI (enhanced vegetation index) was used as a breakthrough point. ArcGIS software was used and time series models of vegetation cover were constructed to dynamically monitor the vegetation changes in the Tarim River basin.[Results] ①The vegetation coverage of Tarim River basin was low

and the spatial-temporal heterogeneity of vegetation index was large. The highest vegetation cover in the main steam was only 23.56% in July

2017

while the highest vegetation coverage in the upstream was 3.36 times of that of the downstream section

and the annual maximum ratio of the vegetation coverage in the upper reaches was 4.28. ②There was no significant difference in vegetation coverage between 2017 and 2007 in the whole basin. Time series model showed a positive trend for the future vegetation restoration of the Tarim River. ③There was no significant difference between NDVI and EVI

but NDVI tended to be low in areas with low vegetation coverage

while it tended to be high in areas with high vegetation coverage.[Conclusion] The vegetation coverage of the Tarim River basin remains stable currently. Moreover

the ecological environment will be improved in the future. Dynamic monitoring and quantitative analysis of vegetation restoration effectiveness based on EVI index is feasible.

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references

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