干旱区生态环境知识资源中心(Arid): 基于MODIS植被指数估算青海湖流域植被覆盖度研究

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	基于MODIS植被指数估算青海湖流域植被覆盖度研究
其他题名	Estimation Vegetation Coverage Based on Vegetation Index of MODIS Data in Qinghai Lake Watershed
	游浩妍 1; 骆成凤 2; 刘正军 2; 于秀娟 2
来源期刊	遥感信息
ISSN	1000-3177
出版年	2012
卷号	27 期号:5 页码:55-60,66
中文摘要	将MODIS数据合成的4种植被指数作为输入参数,采用像元二分模型对研究区的植被覆盖度进行估算,利用2006年的TM数据解译结果和2011年8月的野外实测数据对反演结果进行验证。结果显示:采用ND-VI估算的植被覆盖度比较符合研究区实地状况,样点估算精度达到87.13%;其他3种植被指数估算的植被覆盖度值比实际值低,尤其是对该区域典型植被草原草甸的覆盖度估算结果明显偏低。研究表明:2011年8月青海湖流域植被覆盖度以中高覆盖度为主,占整个流域面积的57%以上;植被覆盖度在空间上呈中部高、西北低的分布特点。
英文摘要	The Qinghai Lake watershed is the natural barrier which controls the desertification spreading for west to the east.Because of the simple structure of the grassland ecological system here,the area is fragile.Vegetation coverage is a effective index that measure the vegetation and ecological environment of the watershed.A dimidiate pixel model was adopted to estimate the vegetation coverage of the study area,and four different vegetation index form MODIS data were used as the input parameters.The vegetation coverage result precision was validated with the reference of 2006 TM data interpretation results and the field investigation data in August 2011.The results show that:the vegetation coverage based NDVI estimation is consistent with the study area condition,sample estimate precision is 87.13%;the vegetation coverage of other three vegetation index estimation value is lower than the actual value,especially the estimation results of the typical grassland meadow coverage is apparent on the low side.The results show the vegetation coverage is high in Qinghai Lake watershed,more than 57% with high and middle vegetation coverage in 2011 August.And the distribution characteristic is middle part high and northwest part low.
中文关键词	植被覆盖度 ; 植被指数 ; 像元二分模型 ; 青海湖流域
英文关键词	MODIS vegetation coverage vegetation index dimidiate pixel model Qinghai Lake watershed MODIS
语种	中文
国家	中国
收录类别	CSCD
WOS类目	REMOTE SENSING
WOS研究方向	Remote Sensing
CSCD记录号	CSCD:4656948
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228805
作者单位	1.辽宁工程技术大学测绘与地理科学学院, 阜新, 辽宁 123000, 中国; 2.中国测绘科学研究院摄影测量与遥感所, 北京 100830, 中国
推荐引用方式 GB/T 7714	游浩妍,骆成凤,刘正军,等. 基于MODIS植被指数估算青海湖流域植被覆盖度研究[J],2012,27(5):55-60,66.
APA	游浩妍,骆成凤,刘正军,&于秀娟.(2012).基于MODIS植被指数估算青海湖流域植被覆盖度研究.遥感信息,27(5),55-60,66.
MLA	游浩妍,et al."基于MODIS植被指数估算青海湖流域植被覆盖度研究".遥感信息 27.5(2012):55-60,66.