| 基于RS和GIS的藏北地区草地退化动态监测与驱动力分析——以申扎县为例 |
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| 引用本文： | 陈涛,杨武年,徐瑶.基于RS和GIS的藏北地区草地退化动态监测与驱动力分析——以申扎县为例[J].西南师范大学学报(自然科学版),2011,36(5):134-139. |
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| 作者姓名： | 陈涛 杨武年 徐瑶 |
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| 作者单位： | 成都理工大学地球科学学院;西华师范大学国土资源学院; |
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| 基金项目： | “西藏重大农业生态环境问题防护技术研究”基金资助项目([2007]71) |
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| 摘 要： | 该文运用遥感(RS)和地理信息系统(GIS)技术,以1990年、2000年和2009年陆地卫星遥感影像为信息源,通过提取植被指数和遥感二分像元模型,估算了西藏申扎县不同时期的植被覆盖度.结果表明:在整个研究时段内,草地退化的面积在增加,从1990年到2009年,草地植被覆盖面积减少了92.88万hm2,占申扎县草地面积...
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| 关 键 词： | 申扎县 草地退化 归一化植被指数 植被覆盖 |
Research on the Dynamic Change of the Grassland Degradation in Shenzha County with RS and GIS Technology |
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| CHEN Tao ,YANG Wu-nian,XU Yao, .College of Earth Science,Chengdu University of Technolog,Chengdu ,China,.L, Resources College,China West Normal University,Nanchong Sichuan.Research on the Dynamic Change of the Grassland Degradation in Shenzha County with RS and GIS Technology[J].Journal of Southwest China Normal University(Natural Science),2011,36(5):134-139. |
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| Authors: | CHEN Tao YANG Wu-nian XU Yao College of Earth Science Chengdu University of Technolog Chengdu China L Resources College China West Normal University Nanchong Sichuan |
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| Institution: | CHEN Tao 1,2,YANG Wu-nian1,XU Yao1,2 1.College of Earth Science,Chengdu University of Technolog,Chengdu 610059,China,2.Land and Resources College,China West Normal University,Nanchong Sichuan 637002 |
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| Abstract: | In this paper,on the basis of RS technique and GIS technique,remote sensing images acquired from Landsat of three periods(1990,2000 and 2009) as information source were used to estimate the vegetation coverage of study area in different periods by extracting NDVI and improved dimidiate pixel estimating model.And the results show that the area of grassland degradation is on the increase in the whole studied periods,and 928800 hm2 grassland lost in the past 20 years,taking up 33.24% of the total grassland are... |
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| Keywords: | Shenzha county grassland degradation NDVI vegetation coverage |
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