Guo Ze Cheng, Wei Wei, Zhang Xue Yuan, Li Zhen Ya, Zhou Jun Ju, Xie Bin Bin
College of Geographical and Environment Science, Northwest Normal University, Lanzhou 730070, China.
School of Urban Economics and Tourism Culture, Lanzhou City University, Lanzhou 730070, China.
Ying Yong Sheng Tai Xue Bao. 2019 Sep;30(9):3075-3086. doi: 10.13287/j.1001-9332.201909.013.
Based on RS and GIS, 11 indexes from three aspects including natural capital, social pressure and economic supports were selected. The natural capital index (NCI), social pressure index (SPI), economic support index (ESI), and environment quality evaluation index (EQEI) were constructed by using spatial principal component analysis, variation coefficient method, and analytic hierarchy process. The spatial distribution characteristics and influencing factor of the environmental quality in Shiyang River Basin were analyzed. The results showed that the overall environmental quality was at poor level in Shiyang River Basin. The regions with better classes of environmental quality were mainly concentrated in the upper reaches of Qilian Mountains, and those with poorer classes were mainly concentrated in the middle-lower reaches of low hills land and desert. The EQEI value in Shiyang River Basin had polarization phenomenon from southwest to northeast. With the variation of distance, the value had large variation range, with obvious spatial heterogeneity. The environmental quality showed both high and low aggregation patterns, with "fault" distribution. There were highly clustered hot spots and highly clustered cold spots in the basin. Among the influen-cing factors of environmental quality, natural capital was the dominant one, social pressure was the second, and economic support was the least contributor.
基于遥感（RS）和地理信息系统（GIS），从自然资本、社会压力和经济支撑三个方面选取了11个指标。利用空间主成分分析法、变异系数法和层次分析法构建了自然资本指数（NCI）、社会压力指数（SPI）、经济支撑指数（ESI）和环境质量评价指数（EQEI）。分析了石羊河流域环境质量的空间分布特征及影响因素。结果表明，石羊河流域整体环境质量处于较差水平。环境质量较好的区域主要集中在祁连山上游，较差的区域主要集中在中下游低山丘陵地带和沙漠地区。石羊河流域EQEI值从西南向东北呈现极化现象。随着距离的变化，该值变化幅度较大，具有明显的空间异质性。环境质量呈现高低聚集格局，存在“断层”分布。流域内存在高度聚集的热点和高度聚集的冷点。在环境质量的影响因素中，自然资本占主导地位，社会压力次之，经济支撑的贡献最小。
