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抚仙湖流域生态用地时空演变及其驱动因素
尹娟1, 资本飞2, 阳利永1, 陈婧祎1
1.玉溪师范学院 地理与国土工程学院, 云南 玉溪 653100;2.玉溪市基础地理信息中心, 云南 玉溪 653100
摘要:
[目的] 研究生态用地时空演变规律及形成机制,为维持区域生态平衡和保障生态文明建设提供科学参考。[方法] 运用土地利用变化幅度、洛伦兹曲线、基尼系数、回归分析及GIS技术等方法,分析2010-2018年抚仙湖流域生态用地时空演变特征及其形成机理。[结果] ①抚仙湖流域生态用地以耕地、林地和水域及水利设施用地为主。8 a来,耕地面积减少5.15 km2,林地面积减少1.94 km2,草地面积减少0.81 km2,园地面积减少0.19 km2,其他土地面积减少1.40 km2,水域及水利设施用地面积增加0.03 km2。②流域各种生态用地空间分布差异较大,耕地、林地空间分布较均匀,洛伦兹曲线比较靠近绝对均匀线,基尼系数居0~0.25之间。草地、园地、水域及水利设施用地和其他土地分布相对集中,洛伦兹曲线下凹程度较大,基尼系数多处于0.5之上。生态用地空间分布不均的趋势有所加强。③从驱动机制来看,导致流域生态用地时空变化的主要驱动因素为人口密度、城镇化水平、政策、到主要公路距离、到水域距离、到城镇建成区距离。[结论] 研究时段内,抚仙湖流域生态用地时空变化较显著,其变化是自然条件、社会经济条件及空间区位条件多种因素协同作用的结果。
关键词:  生态用地  时空演变  驱动因素  抚仙湖流域
DOI:10.13961/j.cnki.stbctb.2020.06.033
分类号:F301.24
基金项目:云南省教育厅科学研究项目“抚仙湖流域生态用地供需平衡与优化研究”(2020J0643);云南省地方本科高校(部分)基础研究联合专项“基于改进生态足迹模型的抚仙湖流域土地承载力研究”(2017FH001-045)
Spatial-temporal Evolution and Driving Factors of Ecological Land Use in Fuxian Lake Basin
Yin Juan1, Zi Benfei2, Yang Liyong1, Chen Jingyi1
1.College of Geography and Land Engineering, Yuxi Normal University, Yuxi, Yunnan 653100, China;2.Yuxi Geomatics Center, Yuxi, Yunnan 653100, China
Abstract:
[Objective] The spatial and temporal evolution and formation mechanism of ecological land was studied in order to provide scientific reference for maintaining regional ecological balance and ensuring the construction of ecological civilization.[Methods] The land use change amplitude, Lorentz curve, Gini coefficient, regression analysis and GIS technology were used to comprehensively analyze the spatial-temporal evolution characteristics of ecological land in Fuxian Lake basin from 2010 to 2018, and discuss its formation mechanism.[Results] ① The main types of ecological land use in Fuxian Lake basin were cultivated land, forest land, water area and water conservancy facilities. In the past 8 years, the area of arable land, woodland, grassland, garden land and other land decreased by 5.15, 1.94, 0.81, 0.19 and 1.40 km2, respectively, while the area of water and water conservancy facilities increased by 0.03 km2. ② The spatial distribution of various ecological land in the river basin was quite different, the spatial distribution of cultivated land and forest land was relatively uniform. The Lorentz curve was relatively close to the absolute uniform line, and the Gini coefficient was 0~0.25. The distribution of grassland, garden land, water area and water conservancy facilities, unused land were relatively concentrated. The Lorentz curve was more concave, and the Gini coefficient was mostly above 0.5. The uneven spatial distribution of ecological land has strengthened. ③ From the perspective of driving mechanism, the main driving factors that driving the temporal and spatial changes of ecological land in the river basin were population density, urbanization level, policy, distance to major roads, distance to waters, and distance to urban built-up areas.[Conclusion] During the study period, the temporal and spatial changes of the ecological land in Fuxian Lake basin were significant, which is the result of the synergistic effect of various factors, such as natural conditions, socio-economic conditions and spatial location conditions.
Key words:  ecological land  spatial and temporal evolution  driving factors  Fuxian Lake basin