摘要
基于3S技术分析了2000—2015年间黔南州植被覆盖度和不同等级石漠化格局变化特征,为喀斯特山区生态环境保护和石漠化防治提供参考。采用2000年、2005年、2010年、2015年的植被NDVI遥感影像计算植被覆盖度,通过图像差值分析和石漠化转移矩阵定量分析研究期间石漠化格局变化特征。2000年黔南州无石漠化面积占总面积的51%,重度石漠化面积占11%,石漠化程度最严重的是长顺县、惠水县和独山县;2005年其无石漠化面积达到研究期间的最大值,重度石漠化面积达到最小值,长顺县石漠化较严重;2010年无石漠化面积为研究期间的最小值,重度石漠化面积为最大值,整个黔南州石漠化程度加深,面积在扩大,黔南州各县、市均有较严重的石漠化分布;2015年其无石漠化面积在2010年的基础上有所上升,而重度石漠化面积在2010年的基础上有所下降、石漠化程度有所减弱,黔南州中西部、东南部石漠化较为严重。黔南州生态环境脆弱,在石漠化治理过程中要坚持生态治理模式,促进经济社会可持续发展。
The variation characteristics of rocky desertification pattern were studied from 2000 to 2015 in Qiannan Prefecture of Guizhou Province. The study will provide reference for ecological environment protection and rocky desertification prevention and control in Karst mountain area. The NDVI derived from remote sensing images were used to analyze the changes of vegetation coverage and rocky desertification area in 2000, 2005, 2010 and 2015. Additionally, the image difference and the transfer matrix were adopted to analyze the change patterns of rocky desertification in quantity. In 2000, the area of rocky desertification in Qiannan Prefecture was accounted for 51% of the total area with severe rocky desertification being 11%. The most serious rocky desertification areas were in Changshun, Huishui and Dushan Counties. In 2005, the area of rocky desertification was the minimum value in Qiannan, while the rocky desertification in Changshun County. This indicated that the vegetation coverage was better in 2005 compared with 2000. In 2010, the area of rocky desertification in Qiannan Prefecture was the smallest, while the area of severe rocky desertification was the maximum during the study period. In this period, the serious rocky desertification was distributed in Qiannan counties. In 2015, the area of rocky desertification was increased on the basis of 2010, and the area of severe rocky desertification was declined compared with 2010. The rocky desertification was more serious in midwest and southeast of Qiannan. The Qiannan Prefecture had a fragile ecological environment. In the process of rock desertification control, we must adhere to the ecological management model to promote sustainable economic and social development.
作者
许玉凤
黄敏
潘网生
张永雷
姚兴
孙连群
XU Yufeng;HUANG Min;PAN Wangsheng;ZHANG Yonglei;YAO Xing;SUN Lianqun(School of Tourism and Resource Environment,Qiannan Normal University for Nationalities,Duyun 558000,China)
出处
《生态科学》
CSCD
2018年第4期105-113,共9页
Ecological Science
基金
贵州省教育厅创新群体重大研究项目(黔教合KY字[2016]055)
贵州省教育厅创新群体重大研究项目(黔教合KY字[2016]054)
关键词
植被覆盖度
石漠化
变化特征
黔南州
vegetation coverage
rocky desertification
variation characteristics
Qiannan Prefecture
