2000—2017年甘肃省生态环境质量时空演变格局及其影响因素  

Spatiotemporal evolution pattern and influencing factors of eco-environmental quality in Gansu from 2000 to 2017

作　　者：宋媛 石惠春[1] 谢敏慧 赵鹏霞 SONG Yuan;SHI Hui-chun;XIE Min-hui;ZHAO Peng-xia(College of Geographical and Environmental Science,Northwest Normal University,Lanzhou 730070,China)

机构地区：[1]西北师范大学地理与环境科学学院

出　　处：《生态学杂志》2019年第12期3800-3808,共9页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(41161022);甘肃省科技支撑计划项目(090NKCA075)资助

摘　　要：以生态环境较为脆弱的甘肃省为研究区,基于RS和GIS,从自然因素和人为因素两个方面,选取11个指标,运用空间主成分分析法构建生态环境质量指数,对甘肃省生态环境质量时空分布特征及其影响因素进行了分析。结果表明:从甘肃省生态环境质量空间分布特征来看,2000和2017年的生态环境质量在空间分布上存在一定的两极分化现象,生态环境质量等级为差、较差等级主要集中在甘肃省西北地区,而生态环境质量等级为良、优等级主要集中在甘肃省东南地区;从甘肃省生态环境质量时间演变格局来看,17年间生态环境质量整体上呈现有所好转的趋势;从甘肃省生态环境质量影响因素来看,总体上气候条件、植被覆盖、土地利用方式和土壤基质等因素的影响作用占据主导地位,而人口经济、地形地貌和水文环境等因素的影响作用较弱。With RS and GIS,spatial principal component analysis was used to construct the ecoenvironmental quality index of Gansu,a region with relatively fragile eco-environment,by selecting 11 indicators including natural and anthropogenic factors.The spatiotemporal distribution and influencing factors of eco-environmental quality were analyzed.The results showed that eco-environmental quality in 2000 and 2017 showed a polarization phenomenon in term of spatial distribution.The areas with poor and fair grades of eco-environmental quality were mainly concentrated in northwest Gansu,while the areas with good and excellent grades of eco-environmental quality were mainly concentrated in southeast Gansu.Temporally,there was a trend of improvement for eco-environmental quality in the past 17 years.Generally,climate,vegetation cover,land use type,and soil matrix were dominant factors affecting eco-environmental quality,while the role of population economy,landform and hydrological environment were relatively minor.

关 键 词：生态环境质量 时空变化 空间主成分分析 地理探测器 甘肃省 

分 类 号：F32[经济管理—产业经济]