首页|基于遥感生态指数的杭州湾大湾区生态质量演化监测及其对土地利用响应分析

基于遥感生态指数的杭州湾大湾区生态质量演化监测及其对土地利用响应分析

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生态质量监测与评价是合理、高效开展生态环境保护工作的基础和关键.通过构建遥感生态指数(RSEI)监测了杭州湾大湾区1995~2020年生态质量时空变化,通过耦合土地利用/覆被变化挖掘了生态质量变化和土地利用类型/转化间的定量关系.结果表明:①杭州湾大湾区整体生态质量呈现上升下降再上升的变化过程,RSEI维持在0.62,生态质量较为优良;各地级市生态质量变化迥异,由北向南依次呈现下降、上升和波动3种不同趋势.②杭州湾大湾区生态质量上升区域(57.5%)多于下降区域(42.5%),山区林地、中心城区和滨海湿地是生态质量上升的热点区域,而城镇化和滩涂围垦则是生态质量下降的主要原因.③近25 a森林和建设用地的生态质量快速上升(ΔRSEI>+0.1),耕地生态质量明显下降(ΔRSEI=-0.08),导致人类环境内部的生态质量差异逐步减小,而自然向人类环境转化的生态代价日益增大.研究可为海岸带资源合理利用和生态环境保护提供科学依据,服务湾区城市群社会高质量发展.
Dynamic Monitoring of Ecological Quality for Hangzhou Greater Bay Area and Its Response to Land Use Cover Change Using Remote Sensing based Ecological Index
Ecological quality monitoring and evaluation is the basis and key to carrying out ecological and envi-ronmental protection work reasonably and efficiently.Ecological quality monitoring is the basis and key process for effective ecological conservations,and it also plays an important role in ecological civilization and high quali-ty development of our society.In this study,we constructed a Remote Sensing based Ecological Index(RSEI)to monitor the spatio-temporal changes of ecological quality in the Hangzhou Greater Bay Area during 1995-2020.On the basis of which,we explored the quantitative relationship between ecological quality and land use types or conversions by coupling RSEI and land use data.The results showed that,(1)the overall ecological quality of Hangzhou Greater Bay Area first increased,then decreased,followed by an increase at the end.The RSEI maintained at 0.62,indicating that a relatively good ecological quality.The ecological quality of its be-longing prefecture-level cities exhibited three different trends:decline,rise and fluctuation from north to south.(2)The area with improved ecological quality(57.5% )was greater than the one with degraded ecological quali-ty(42.5% )in the Hangzhou Greater Bay Area.The forests,central urban areas and coastal wetlands were the hotspots for ecological quality imporvement,while the processes of rapid urbanization and tidal flat reclamation were responsible for degraded ecological environments.(3)In recent 25 years,the ecological quality of forest and build-up areas increased rapidly(△RSEI>+0.1),but the ecological quality of cultivated land decreased significantly(△RSEI=-0.08).This migrated the gap of ecological quality within human dominant environ-ments,meanwile increased the ecological cost of the transformation from nature to human dominant environ-ments.The study is expected to provide scientific basis for balancing coastal resource developments and ecologi-cal conservations,and serve for the high-quality development of coastal urban agglomerations.

Remote sensing based ecological indexLand use cover changeHangzhou Greater Bay AreaEco-logical qualitySpatio-temporal analysisChange detection

陈宇骏、王凌宇、李悦、甘聪颖、叶君伟、杨震杰、孙超

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宁波大学 地理与空间信息技术系,浙江 宁波 315211

浙江省协同创新中心"陆海国土空间利用与治理",浙江 宁波 315211

浙江省新型重点专业智库宁波大学东海战略研究院东海海洋生态研究中心,浙江 宁波 315211

遥感生态指数 土地利用/覆被变化 杭州湾大湾区 生态质量评价 时空分析 变化监测

国家自然科学基金项目宁波市自然科学基金项目宁波市重大科技任务攻关项目宁波大学大学生科技创新计划项目浙江省大学生科技创新活动计划暨新苗人才计划项目国家级大学生创新创业训练计划项目国家级大学生创新创业训练计划项目

419011212022J0752022Z1812022SRIP43042022R405A062202211646007202211646024

2024

遥感技术与应用
中国科学院遥感联合中心

遥感技术与应用

CSTPCD北大核心
影响因子:0.961
ISSN:1004-0323
年,卷(期):2024.39(3)
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