摘要
基于甘州区1991—2020年7期Landsat遥感影像提取绿度、湿度、干度、热度并构建RSEI指数,考虑数字高程数据及人口数据,利用景观格局指数、空间自相关等分析甘州区生态环境质量时空变化特征,通过地理探测器对甘州区生态环境质量变化的影响因子进行探究。结果表明:1991—2020年甘州区RSEI从0.306 9上升到0.368 0,生态环境质量稳中有升;生态环境质量整体空间布局较稳定,但中部绿洲向外扩展的同时内部破碎化程度加剧,南端花寨乡和安阳乡生态环境质量极不稳定;生态环境质量空间聚类特征明显,高-高聚类区集中分布在中部绿洲,低-低聚类区主要分布在北部和南部;30 a内甘州区生态环境质量改善面积大于恶化面积,生态环境质量整体好转;从影响因子来看,所有因子的影响均显著,多因子交互作用明显,主导因子为绿度和干度,人口密度的影响力在逐渐提升。
Based on the seven sets Landsat images of Ganzhou District from 1991 to 2020, greenness, humidity, dryness and heat were extracted and RSEI indexes were built. Taking into account digital elevation model data and population data, the landscape pattern index and spatial autocorrelation were used to analyze the temporal and spatial change characteristics of the ecological environment quality in Ganzhou District. The influencing factors of ecological environment quality changes in Ganzhou District were explored. The results show that the average RSEI of Ganzhou District increases from 0.306 9 to 0.368 0 and the trend of ecological environment quality is stable with progress. The overall spatial layout of the ecological environment is relatively stable, but the degree of internal fragmentation is intensifying, at the time the central oasis expands outwards. The ecological environment quality of Huazhai Township and Anyang Township in the southern end is extremely unstable. The ecological environment quality has obvious clustering characteristics, high-high clusters are concentrated in the central oasis, low-low clusters are mainly distributed in the north and south;the improved area of ecological environment quality is greater than that of the deteriorated area in the past 30 years, and the overall ecological environment quality has maintained improvement. From the perspective of influencing factors, all indicators are significant, and the multi-factor interaction is obvious. The dominant factors are greenness and dryness, and the influence of population density is gradually increasing.
作者
张晓山
张旺锋
高新宇
韦建芳
刘影
ZHANG Xiaoshan;ZHANG Wangfeng;GAO Xinyu;WEI Jianfang;LIU Ying(College of Resources and Environment,Lanzhou University,Lanzhou 730000,China;Lanzhou Urban&Rural Planning and Design Institute,Lanzhou 730000,China)
出处
《人民黄河》
CAS
北大核心
2023年第2期114-120,共7页
Yellow River
基金
国家自然科学基金青年科学基金项目(41701170)
中央高校基本科研业务费专项(18LZUJBWZY068)。
关键词
RSEI
生态环境质量
动态评估
地理探测器
张掖市甘州区
RSEI
ecological environment quality
dynamic evaluation
geographic detector
Ganzhou District of Zhangye City
