湖北农业科学 ›› 2019, Vol. 58 ›› Issue (12): 52-57.doi: 10.14088/j.cnki.issn0439-8114.2019.12.013

• 资源·环境 • 上一篇    下一篇

基于RS和GIS的甘南县2006—2016年植被覆盖度时空演变分析

龚文峰1, 曹凯华1, 周莹2   

  1. 1.黑龙江大学水利电力学院,哈尔滨 150086;
    2.黑龙江国防科学研究院,哈尔滨 150040
  • 收稿日期:2018-10-12 出版日期:2019-06-25 发布日期:2019-12-05
  • 作者简介:龚文峰(1976-),男,河南南阳人,教授,博士,主要从事RS和GIS在资源与环境监测上的应用,(电话)13796674248(电子信箱)gwf101@163.com。
  • 基金资助:
    国家科工局高分辨率对地重大观测项目(民用部分:72-Y20A08-9002-16/17); 黑龙江省自然科学基金项目(QC2017036)

Temporal and spatial dynamic change analysis of vegetation coverage based on RS and GIS in 2006—2011 in Gannan county

GONG Wen-feng1, CAO Kai-hua1, ZHOU Ying2   

  1. 1.College of Water Conservancy and Electric Power,Heilongjiang University,Harbin 150086,China;
    2.Heilongjiang Institute of National Deference Science and Technology,Harbin 150040,China
  • Received:2018-10-12 Online:2019-06-25 Published:2019-12-05

摘要: 基于2006、2011和2016年的Landsat TM/OLI影像数据,反演农牧过渡区植被覆盖度。借助于RS和GIS技术,以黑龙江省甘南县为研究对象,采用归一化植被指数及像元二分模型,定量获取研究区域植被覆盖度,基于转移矩阵模型定量分析10年间植被覆盖度时空变化特征和演变进程。结果表明,研究区植被覆盖度整体状况较好,2006、2011、2016年3期数据高覆盖度和中高覆盖度面积比例之和分别为87.29%、87.18%和87.10%。2006—2011年植被覆盖度主要由高覆盖度和中覆盖度转换为中高覆盖度,转换率分别为76.83%和55.49%,2011—2016年中高覆盖度和高覆盖度之间转换强烈,相互间的转换率分别为10.87%和83.00%。10年间,2006—2011、2006—2016年植被变化稳定区的面积比例分别为64.32%和65.54%。2011—2016年较2006—2011年植被退化面积减少257 km2,植被改善面积增加199 km2,植被仍以退化为主。

关键词: 植被覆盖度, 农牧交错带, 时空演变, 甘南县

Abstract: In order to invert the vegetation coverage of the farming-pastoral transition zone by using the Landsat TM/OLI image data of 2006, 2011 and 2016 ,the Gannan county of Heilongjiang province was taken as the study region, based on the RS and GIS technology, the models of normalized difference vegetation index(NDVI) and dimidiate pixel were quantitatively obtained the vegetation coverage of the study area, and the transfer matrix model was used to analyze the temporal and spatial variation characteristics and evolution process of vegetation coverage within 10 years. The results showed that the overall coverage of vegetation cover in the study area was good. The sum of the data coverage and the medium-high coverage area of the three phases in 2006,2011,2016 was 87.29%,87.18% and 87.10%, respectively. In 2006—2011, the vegetation coverage was mainly converted from high coverage and middle coverage to medium and high coverage, and the conversion rates was 76.83% and 55.49%, respectively. In 2011—2016, the conversion between medium and high coverage and high coverage was strong, and the conversion rate was 10.87% and 83.00%, respectively. In the past 10 years, the area ratio of the vegetation change stable area was 64.32% and 65.54%, respectively. 2011—2016 compared with 2006—2011, the area of vegetation degradation decreased by 257 km2, while the area of vegetation improvement increased by 199 km2, and the vegetation was still dominated by degradation.

Key words: vegetation coverage, farming-pastoral transition zone, spatio-temporal evolution, Gannan county

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