基于改进遥感生态指数的玉溪市东部生态质量评价  

Evaluation of ecological quality of eastern Yuxi City based on the improved remote sensing ecological index

作　　者：孙咏琦 刘士鑫 李约翰 李建华 SUN Yongqi;LIU Shixin;LI Yuehan;LI Jianhua(College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,Yunnan,China;Engineering Research Center of Land and Resources Science and Technology,Kunming 650201,Yunnan,China;College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,Yunnan,China)

机构地区：[1]云南农业大学水利学院,云南昆明650201 [2]云南农业大学自然资源科学技术工程研究中心,云南昆明650201 [3]云南农业大学资源与环境学院,云南昆明650201

出　　处：《草业科学》2023年第2期551-560,共10页Pratacultural Science

基　　金：云南省教育厅科学研究基金项目(2022Y288)。

摘　　要：随着玉溪市东部城市化及旅游业不断发展,频繁的人类活动对生态环境产生了不可忽视的影响,对生态质量进行客观的监测和评价具有重要意义。本研究以玉溪市东部为研究区域,结合研究区实际情况在遥感生态指数模型中加入水土保持因子构建改进遥感生态指数(IRSEI)模型,采用标准差椭圆、趋势分析、Hurst持续性分析等方法,探究研究区内2003-2019年生态质量的时空变化情况并提出相应建议。结果表明:1)在研究时段内研究区生态质量呈先恶化后改善的趋势,整体生态水平处于良好偏下的水平,IRSEI均值处于0.5左右。2)生态质量在空间上呈“东北-西南”走向,持续性恶化的区域面积约102665.07 hm^(2),主要分布在阳宗海南部的耕地区域。3)高程和人类活动等因素对生态质量起到不同程度的影响。综上,本研究对促进该地社会经济的可持续发展及为后续空间规划等提供重要参考。With the continuous development of urbanization and tourism in the eastern part of Yuxi City,frequent human activities have a non-negligible impact on the ecological environment,and it is important to conduct objective monitoring and evaluation of ecological quality.This study selects the eastern part of Yuxi City as the study area,adds soil and water conservation factors to the remote sensing ecological index model,and constructs an improved remote sensing ecological index(IRSEI)model.It also uses standard deviation ellipse,trend analysis,and Hurst persistence analysis to investigate the spatial and temporal changes of ecological quality in the study area between 2003 and 2019,making corresponding suggestions.The results showed that:1)the ecological quality of the study area showed a trend of deterioration followed by improvement during the study period,and the overall ecological level was a good to low level,with the average value of IRSEI around 0.5.2)Spatially,the ecological quality shows a“northeast-southwest”trend,and the area of persistent deterioration is about 102665.07 hm^(2),mainly in the arable land the south of Yangzong Lake.3)Factors such as elevation and human activities have different degrees of influence on ecological quality.In summary,this study can provide important reference values for promoting the sustainable socio-economic development of the area and for subsequent spatial planning.

关 键 词：遥感生态指数 生态质量 时空变化 标准差椭圆 趋势分析 重心偏移 抚仙湖流域 

分 类 号：X826[环境科学与工程—环境工程]