基于Landsat 9的威海市植被覆盖度特征分析和生态质量评价
Analysis for Landsat 9-based characterization of vegetation cover and evaluation for ecological quality in Weihai City
张林林 1刘辉1
作者信息
- 1. 山东省地质测绘院,山东 济南 250000
- 折叠
摘要
威海市作为中国重要的海洋经济区,其生态系统服务功能对维护区域生态平衡及促进可持续发展具有重要意义.然而,随着城市化进程的加快,人类活动对自然环境的干扰日益加剧,导致植被破坏、水质下降等生态环境问题频发,亟须科学有效的监测手段来指导生态保护与修复工作.针对山东省威海市植被覆盖度及生态环境质量的评估需求,采用2022年Landsat 9遥感影像与土地利用数据作为信息源,对威海市的植被覆盖度空间格局与生态环境质量分布特征进行了研究.采用像元二分模型法计算了植被覆盖度指数(FVC)与生态环境指数(RSEI),旨在科学、全面地揭示威海市的生态环境现状.结果表明:1)威海市整体植被覆盖度较高,说明该地区具有良好的自然基底条件,但不同行政区之间的植被覆盖度存在显著差异,具体而言,乳山市的植被覆盖度最高,其次是文登区、荣成市,而环翠区相对较低;2)在生态环境质量方面,各辖区呈现出较为一致的等级结构分布.从面积占比来看,具体表现为:生态环境较好>生态环境好>生态环境一般>生态环境差>生态环境较差.采用的遥感技术与指数计算方法,可提高生态环境监测与评估的精度和效率,也为未来大尺度、高精度的生态环境监测与评估工作提供了参考和借鉴.
Abstract
Weihai,as an important marine economic zone in China,its ecosystem service function is of great significance in maintaining regional ecological balance and promoting sustainable development.However,with the acceleration of urbanization,human activities interfered with the natural environment is increasingly severe,resulting in frequent occurrence of ecological and environmental problems such as vegetation destruction and water quality degradation,therefor the scientific and effective monitoring methods are urgently needed to guide ecological protection and restoration work.In response to the needs of assessing vegetation cover and ecological environment quality in Weihai City,Shandong Province,the spatial pattern of vegetation cover and ecological environment quality distribution characteristics of Weihai City were studied using Landsat 9 remote sensing imagery and land use data in 2022 as the information source.The image element dichotomous modeling method is adopted in the study to calculate the vegetation cover index(FVC)and the ecological environment index(RSEI),aiming to reveal the current ecological environment status of Weihai City in a scientific and comprehensive way.The results showed that:1)The overall vegetation cover in Weihai City is high,indicating that the area has good natural substrate conditions,but there are significant differences in vegetation cover among different administrative districts,specifically,Lushan City has the highest vegetation cover,followed by Wendeng and Rongcheng Districts,while there is a relatively lower one in Huancui District.2)In terms of ecological environmental quality,the jurisdictions show a more consistent distribution of the hierarchical structure.But in terms of the area percentage,it is shown as follows:better ecological environment>good ecological environment>general ecological environment>poor ecological environment>poor ecological environment.The remote sensing technology and index calculation method adopted in the study not only improve the precision and efficiency of ecological environment monitoring and assessment,but also provide methodological references and lessons for future large-scale and high-precision ecological environment monitoring and assessment work.
关键词
植被覆盖度/生态环境质量/RSEIKey words
vegetation coverage/ecological environment quality/RSEI引用本文复制引用
出版年
2024
NETL
NSTL
万方数据