摘要
生态环境变化关系着社会发展,对六池河流域生态环境进行遥感评价,可为岩溶槽谷流域生态文明建设及岩溶石漠化治理提供参考。采用2000年、2010年和2017年3期Landsat系列遥感影像和DEM数据,提取植被盖度、裸土植被指数、坡度指数、湿度指数和热度指数,构建生态环境评价模型。采用空间自相关等方法,揭示乡镇尺度生态环境时空分异特征。研究得出:2000—2017年间六池河流域生态环境质量总体呈快速修复态势,但县域生态环境质量差别明显;2000—2017年间不同乡镇生态环境质量差异显著,县域中心镇、流域下游乡镇生态改善较慢,中南部地区部分乡镇生态改善明显;2000—2017年间乡镇生态环境质量存在正空间集聚,且多年以高—高、低—低聚集为主;乡镇生态环境质量趋势分析中,流域东南是生态环境质量低值带,北部乡镇高值带分布较多。
The ecological environment changes are related to social development.This paper analyzes the dynamic changes of the ecological environment quality of the Liuchi River Basin in Guizhou,in the hope of providing some reference that can promote the ecological civilization construction and environmental restoration of the watershed in the karst trough.The authors used remote sensing images which were from June to August,2000,2010 and 2017 Landsat satellites and GDEMDEM(30 m)data to extract vegetation cover,soil index,slope index,humidity and temperature index which served as the basis for constructing an ecological environment assessment model.In addition,spatial auto-correlation method was adopted to reveal the ecological environment that had different spatial and temporal characteristics in township scale.Some conclusions have been reached:①From 2000 to 2017,the ecological environment quality showed a rapid restoration trend in the Liuchi River basin,but it varied differently in different counties.②The quality of ecological environment showed significant differences in different towns.Meanwhile,the ecological improvement was slower in the county town and downstream towns,and was improved obviously in some towns of the central and southern area.③The ecological environment quality of towns had significant positive spatial agglomeration characteristics,and were dominated by high-high and low-low concentration in most years.In the trend analysis of towns’ecological environment quality,the southeast basin was always the low-value zone,and the high-value zone is mainly distributed in the northern townships.
作者
应奎
李旭东
程东亚
YING Kui;LI Xudong;CHENG Dongya(School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China)
出处
《国土资源遥感》
CSCD
北大核心
2020年第3期173-182,共10页
Remote Sensing for Land & Resources
基金
国家自然科学基金项目“西南山地流域城市化与生态环境的耦合关系研究——以贵州乌江流域为例”(编号:41261039)
中国清洁机制发展基金项目“贵州省应对气候变化‘十三五’规划思路研究”(编号:2014015)共同资助。
关键词
生态环境质量
遥感评定
空间自相关
岩溶槽谷
流域
ecological environment quality
remote sensing assessment
spatial auto-correlation
karst trough
basin
