干旱区研究

干旱区研究 ›› 2012, Vol. 29 ›› Issue (1): 59-63.

• 植物生态 • 上一篇    下一篇

陕西关中地区植被指数变化多尺度分析

莫宏伟1, 2,任志远2   

    1. 湖南科技大学 建筑与城乡规划学院，湖南 湘潭 411201
    2. 陕西师范大学 旅游与环境学院，陕西 西安 710062
  • 收稿日期:2010-12-28 修回日期:2011-02-15 出版日期:2012-01-15 发布日期:2012-02-27
  • 作者简介:莫宏伟（1968-），男，湖南衡阳人，博士，副教授，研究方向为城乡国土资源评价与GIS. E-mail: mhw819@sina.com
  • 基金资助:

    国家自然科学基金项目(40771019)；湖南科技大学博士科研启动基金（E510C6）

Analysis on the Change of NDVI in the Guanzhong Region, Shaanxi Province

MO Hong-wei1, 2,REN Zhi-yuan2   

    1. College of Architecture and Urban & Rural Planning, Hunan University of Science and Technology, Xiangtan 411201, Hunan Province, China
    2.  College of Tourism and Environment Science ,Shaanxi Normal University, Xi’an 710062,China
  • Received:2010-12-28 Revised:2011-02-15 Online:2012-01-15 Published:2012-02-27

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被引次数

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摘要： 以关中地区遥感影像、数字高程(DEM)、地貌类型等资料为依据，运用地学信息图谱理论和方法，在RS和GIS的支持下生成关中地区1986-2007年NDVI变化图谱，并从栅格、地貌单元、坡度带及行政区划等多个尺度上，分析该区近22 a来NDVI的时空变化特征。研究表明：1986-2007年，关中地区年度NDVI]增加了20.91%，2000-2007年年均增幅约为1986-2000年的2.31倍；各地貌单元NDVI增幅表现为：黄土台塬＞黄土墚峁＞山地＞平原＞黄土塬；各坡度带NDVI]基本随坡度的增加而加大，且均呈增大态势；各地市年度NDVI增速为：渭南市>铜川市>宝鸡市>西安市>咸阳市。关中地区NDVI的时空变化是土地利用/覆被变化的结果，“退耕还林”政策的实施，促使了植被覆盖状况的改善。

关键词: 植被指数NDVI, 时空变化, 地学信息图谱, 植被恢复, 驱动力, 关中地区, 陕西

Abstract: Based on remote sensing images, digital elevation model (DEM) and other information of the Guanzhong region, in this paper the spatiotemporal change of NDVI at different scales (such as the grid units, terrain units, slope units and administrative units) in the Guanzhong region during the period from 1986 to 2007 was analyzed using the theory of geographic information images and RS and GIS means. The results show that the NDVI in the Guanzhong region was increased by 20.91% during the period of 1986-2007, and its increase rate was about 2.31 times of that during the period of 1986-2000. The NDVI in all the geomorphologic units was increased in an order of loess tableland > loess ridge > mountain > plain > loess plateau. The NDVI in all the slope zones was also increased, and its increase rate was increased with the increase of slope. The increase rate of NDVI in all the prefectures and cities was in an order of Weinan City > Tongchuan City > Baoji City > Xi’an City > Xianyang City. The spatiotemporal change of NDVI in the Guanzhong region was caused by land use/cover change, and the improvement of vegetation coverage in the study area was brought about by implementing the project of returning land for farming to forest and grassplot.