| 基于MODIS/EVI的额尔古纳河流域植被变化分析 |
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| 引用本文： | 余晓. 基于MODIS/EVI的额尔古纳河流域植被变化分析[J]. 中国水利水电科学研究院学报, 2009, 0(Z1) |
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| 作者姓名： | 余晓 |
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| 作者单位： | 中国水利水电科学研究院 |
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| 基金项目： | 科技基础性工作专项，国家自然科学基金项目 |
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| 摘 要： | 本文选取了额尔古纳河流域2000-2009年5-9月共十年80个时相的MODIS-EVI数据，以每年EVI最大值和平均值为指标对额尔古纳河流域研究区的植被变化趋势进行了分析。分析表明，整个区域的植被指数总体呈下降的趋势，其中显著下降的面积约15197km2（10.05%）；显著增加的面积约为2733km2（1.81%）。根据区域土地利用分类数据以及DEM数据的分析发现，植被呈显著减小趋势的区域主要分布在海拔较低的湿地和海拔较高的林地，林地EVI指数呈显著下降意味着它们发生了大面积的退化，结合1979-2008年4-9月的径流分析发现由于近年来流域径流量的明显减小所以湿地EVI指数呈显著下降也意味着它发生了大面积的退化。额尔古纳河流域气温逐年升高、降水量减少、蒸发量增加等气候条件的变化，是该区域植被指数下降的主要原因。
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| 关 键 词： | MODIS；植被指数；趋势分析；额尔古纳河流域 |
| 收稿时间： | 2010-12-09 |
| 修稿时间： | 2011-01-13 |
Vegetation cover change assessment in Argun basin based on MODIS/EVI |
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| Yuxiao. Vegetation cover change assessment in Argun basin based on MODIS/EVI[J]. Journal of China Institute of Water Resources and Hydropower Research, 2009, 0(Z1) |
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| Authors: | Yuxiao |
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| Affiliation: | China Institute of Water Resources and Hydropower Research |
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| Abstract: | his paper selected 80 periods of MODIS-EVI data of May to September each year from 2000 and 2009 in Argun Basin. The maximum and average of EVI each year were chosen as indicators to analyze vegetation changing trends. Three types of trend were observed- null, positive and negative. Over the study area the negative area reached 15197km2(10.05%) and the positive area was 2733km2(1.81%). Based on a land cover map and DEM data, the analysis showed that the negative areas were mainly located at low altitude wetland and high altitude forest. The forest and wetland negative trend could associate a state of vegetation cover degradation. Increasing of the temperature and evaporation, decreasing of precipitation of Argun Basin should be the main reasons of the negative trend. |
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| Keywords: | MODIS vegetation index trend analysis Argun Basin |
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