基于GEE的日照市近30年生态质量时空演变分析  

Spatiotemporal Variation Analysis of Ecological Quality in Rizhao City over the Past 30 Years Based on GEE

作　　者：田文琴 胡彦香 徐敏 王大海 郭明霞 TIAN Wenqin;HU Yanxiang;XU Min;WANG Dahai;GUO Mingxia(Rizhao City Bureau of Natural Resources and Planning,Rizhao Shandong 276800;Rizhao Big Data Development Service Center,Rizhao Shandong 276800)

机构地区：[1]日照市自然资源和规划局,山东日照276800 [2]日照市大数据发展服务中心,山东日照276800

出　　处：《山东林业科技》2024年第6期43-49,共7页Journal of Shandong Forestry Science and Technology

摘　　要：日照市是我国东部沿海地区的重要城市,评估和监测其生态质量对指导该地区生态环境保护工作具有重要意义。基于GEE平台,利用主成分分析法构建遥感生态指数(RSEI),实现对日照市近30年生态质量的动态监测。结果表明:(1)1990年和2020年日照市RSEI均值分别为0.569和0.597,整体生态质量处于中等水平,呈现明显的空间异质性。生态质量差和较差的区域主要分布在城市建成区,而优和良等级的区域主要分布在山区。(2)1990年至2020年,生态质量改善、稳定和退化的区域所占比例分别为30.93%、51.42%和17.65%,总体呈现改善趋势。改善和稳定的区域主要分布在五莲山区、绣针河流域等生态空间以及中草药种植区、粮食主产区等农业空间,而退化的区域主要分布在东部沿海中心城区、莒县中部建成区等城镇区域。(3)1990年至2020年,岚山区、莒县和五莲县的RSEI均值有所提高,东港区的RSEI基本保持不变。Rizhao City is an important urban center in the eastern coastal region of China.Evaluating and monitoring its ecological quality is crucial for guiding ecological environment protection efforts.This study utilizes the GEE platform to construct a remote sensing ecological index(RSEI)using principal component analysis.The aim is to evaluate the spatiotemporal changes in ecological quality in Rizhao City from 1990 to 2020.The results show that:(1)The mean RSEI of Rizhao City in 1990 and 2020 were0.569 and 0.597 respectively,indicating moderate overall ecological quality with significant spatial heterogeneity.Regions with poor and inferior ecological quality are mainly distributed in urban built-up areas,whereas regions with excellent and good grades are mainly in mountainous areas.(2)Over the period from 1990 to 2020,the proportions of areas with improved,stable,and degraded ecological quality were 30.93%,51.42%,and 17.65%,respectively,showing an overall improvement trend.Regions with improved and stable ecological quality are mainly distributed in ecological spaces such as Wulian Mountain area,Xiuzhen River basin,as well as agricultural spaces such as medicinal herb planting areas,and main grain-producing areas,whereas degraded areas are mainly in urban areas such as the central coastal area of Donggang and built-up zones in Juxian County.(3)From 1990 to 2020,the mean RSEI values in Lanshan,Juxian,and Wulian have increased,while those in Donggang have remained relatively stable.

关 键 词：谷歌地球引擎 生态质量 遥感生态指数 日照市 

分 类 号：X321[环境科学与工程—环境工程]