用微信扫码二维码

分享至好友和朋友圈

WE ARE COMMITTED TO REPORTING THE LATEST FORESTRY ACADEMIC ACHIEVEMENTS

赵昊天, 王林青, 郑勇, 谢天资, 蒋雨轩, 龚固堂, 骆宗诗, 陈俊华. 基于Landsat的青神县植被覆盖动态变化分析[J]. 四川林业科技, 2019, 40(5): 23-28,87. DOI: 10.16779/j.cnki.1003-5508.2019.05.005
引用本文: 赵昊天, 王林青, 郑勇, 谢天资, 蒋雨轩, 龚固堂, 骆宗诗, 陈俊华. 基于Landsat的青神县植被覆盖动态变化分析[J]. 四川林业科技, 2019, 40(5): 23-28,87. DOI: 10.16779/j.cnki.1003-5508.2019.05.005
ZHAO Hao-tian, WANG Lin-qing, ZHENG Yong, XIE Tian-zi, JIANG Yu-xuan, GONG Gu-tang, LUO Zong-shi, CHEN Jun-hua. Dynamic Change Analysis of Vegetation Coverage in Qingshen County Based on Landsat[J]. Journal of Sichuan Forestry Science and Technology, 2019, 40(5): 23-28,87. DOI: 10.16779/j.cnki.1003-5508.2019.05.005
Citation: ZHAO Hao-tian, WANG Lin-qing, ZHENG Yong, XIE Tian-zi, JIANG Yu-xuan, GONG Gu-tang, LUO Zong-shi, CHEN Jun-hua. Dynamic Change Analysis of Vegetation Coverage in Qingshen County Based on Landsat[J]. Journal of Sichuan Forestry Science and Technology, 2019, 40(5): 23-28,87. DOI: 10.16779/j.cnki.1003-5508.2019.05.005

基于Landsat的青神县植被覆盖动态变化分析

Dynamic Change Analysis of Vegetation Coverage in Qingshen County Based on Landsat

  • 摘要: 以Landsat TM/OLI系列遥感数据为基础,利用RS和GIS为技术手段提取NDVI值,通过像元二分模型得出青神县2009年、2013年、2018年三期的植被覆盖度分级图,并用转移矩阵和差值法分析其动态变化情况。结果表明:青神县植被覆盖总体良好,植被覆盖度以中高以上为主。2009-2013年该地区中高以上植被覆盖区占总面积的比例由71.73%降到62.69%,2018年有所改善,占总面积的67.77%,说明2009-2018年青神县植被覆盖度经历了先退化后改善的趋势,但整体发生了小幅度退化,退化面积比改善面积多出6.22 km2,占总面积的1.6%。据分析,城区的扩张、基础设施的建设侵占了耕地和林地,是造成青神县植被覆盖度退化的主要原因。为促进区域生态环境的可持续发展,应进一步提升中心城区及周边的植被覆盖度。

     

    Abstract: Based on Landsat TM/OLI series remote sensing data, NDVI values were extracted by RS and GIS, and vegetation FVC grading maps of Qingshen county in 2009, 2013 and 2018 were obtained by pixel binary model, and their dynamic changes were analyzed by transfer matrix and difference method. The results showed that the vegetation coverage in Qingshen county was generally good, and the vegetation coverage was mainly above medium and high.In 2009-2013, the 71.73% medium and high vegetation coverage in the region above derceased to 62.69%,and the proportion of the total improvement in 2018 accounted for 67.77% of the total area,showing that the vegetation coverage shows in Qingshen county from 2009 to 2018 experienced degradation before improving trend, but overall the small-amplitude degradation.The degradation area was more 6.22 km2 than the improve area, accounting for 1.6% of the total area. According to the analysis, the expansion of urban areas and the construction of infrastructure encroached on the cultivated land and forest land, which was the main cause of vegetation coverage degradation in Qingshen county. In order to promote the sustainable development of regional ecological environment, the vegetation coverage in and around the central city should be further improved.

     

/

返回文章
返回