干旱区生态环境知识资源中心(Arid): 黄土高原典型干旱区退耕还林后植被覆盖变化研究

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	黄土高原典型干旱区退耕还林后植被覆盖变化研究
其他题名	Study on changes of land cover in the typical arid region of the Loess Plateau after the Grain for Green Project
	张玉东; 谭红兵
来源期刊	生态科学
ISSN	1008-8873
出版年	2017
卷号	36 期号:1 页码:139-146
中文摘要	以MODIS NDVI为数据源,选择退耕还林意义最为典型的甘肃省会宁地区为示范区,应用像元二分模型计算该地区20002010年11 a的植被覆盖度,分析了退耕还林后该地区植被覆盖度动态变化特征及趋势。结果表明:从实施退耕还林还草政策以来,会宁县植被覆盖度虽然年际间有较大波动,但总体上呈微弱的增加趋势,并以低植被覆盖度类型和中低植被覆盖度类型为主, 11 a监测期植被覆盖度增加的面积达到70.60%,且植被覆盖度主要向10%45%范围内转化。空间上植被覆盖度差异较大,南部高、中部和北部显著偏低。人类活动与气候变化是影响植被覆盖度变化的主要因素。
英文摘要	Huining county is located in the southern Loess Plateau in China. As a very typical arid/semi-arid area in hilly and gully regions of the Loess Plateau, it seems to be a very significant test area for evaluation of Grain for Green Project. In this paper, MODIS NDVI was selected as the data source to track the variation of vegetation coverage in Huining from 2000 to 2010 and vegetation coverage maps from different periods using the two sub-pixel model. In this study, results show that the vegetation coverage exhibits higher in the southern region, but lower in the central and northern regions in Huining county. Since the policy of Grain for Green Project was put into force, the vegetation coverage in the county has increased and maintained above 20% in most years whereas it has reached to peak value of 36.60% in 2005. During 11 monitoring years, the land is dominated by low and medium-low vegetation coverage type with a large spatial variation. The increased areas of the vegetation coverage are about 70.60%, where the transformation of vegetation coverage is mainly focused on the range from 10% to 45%. Both human activities and climate changes are the main factors to induce the changes of vegetation coverage. Meanwhile, there is a significant correlation (R~2 = 0.688) between precipitation and vegetation coverage.
中文关键词	退耕还林 ; 植被覆盖度 ; 像元二分模型 ; 会宁
英文关键词	Grain for Green Project vegetation coverage two sub-pixel model Huining
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:5961759
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236419
作者单位	河海大学地球科学与工程学院, 南京, 江苏 211100, 中国
推荐引用方式 GB/T 7714	张玉东,谭红兵. 黄土高原典型干旱区退耕还林后植被覆盖变化研究[J],2017,36(1):139-146.
APA	张玉东,&谭红兵.(2017).黄土高原典型干旱区退耕还林后植被覆盖变化研究.生态科学,36(1),139-146.
MLA	张玉东,et al."黄土高原典型干旱区退耕还林后植被覆盖变化研究".生态科学 36.1(2017):139-146.