伊洛河流域土地利用时空变化特征分析

土地利用/覆被变化(LUCC)问题是全球环境变化关注的热点问题之一。研究伊洛河流域的土地利用变化对黄河流域生态保护与高质量发展具有重要意义。基于长期的LandsatTM卫星遥感影像、 R语言弦图可视化模型以及线性模型冗余分析(RDA分析),对伊洛河流域1990年—2020年30年间的土地利用时空变化特征、土地覆被的流量、流向及内在驱动因素进行了分析。结果表明：(1) 1990年—2020年间，伊洛河流域的土地变化呈现林地先减小后增加、耕地先增加后减小、建设用地整体增加、水域整体减小的变化趋势；(2)在数量上，1990年—2020年每10年间，耕地和林地的总变化量最大，建设用地次之，水域、草地和未利用土地的变化量很小；(3) 1990年—2000年、 2000年—2010年、 2010年—2020年的土地利用类型相互转换主要以耕地和林地的相互转化为主，土地利用变化程度呈上升趋势，在2010年—2020年达到最高；(4) 1990年—2020年间，林地重心整体向东北方向偏移，耕地的重心整体向南迁移，林地和耕地重心的变化与退耕还林政策有关。建设用地总体围绕洛阳市主城区，这与社会经济发展和城镇...

Analysis on Characteristics of Temporal and Spatial Changes of Land Use in the Yiluo River Basin

Land use/cover change (LUCC) is one of global environmental change hot issues. The study of land-use changes in the Yiluo River Basin is significant to ecological protection and high-quality development of the Yellow River Basin. Based on long-term LandsatTM satellite remote sensing images, R language string diagram visualization model and linear model redundancy analysis(RDA analysis), this paper analyzed the temporal and spatial change characteristics of land use, land cover flow rate, directionand internal driving factors in the Yiluo River Basin from 1990 to 2020. The results showed: (1) From 1990 to 2020, the land change in the Yiluo River Basin showed a trend of change in forest land firstly decreasing and then increasing, arable land first increasing and then decreasing, construction land increasing as a whole, and water area decreasing as a whole. (2) In terms of quantity Every 10 years from 1990 to 2020, the total amount of change in cultivated land and forest land is the largest, followed by construction land, and the amount of change in water, grassland and unused land are very small. (3) 1990—2000, 2000—2010, 2010—2020 The mutual conversion activity of land use types and the degree of land-use change showed an upward trend, reaching the highest in 2010—2020. (4) From 1990 to 2020, the center of gravity of forest land shifts to the northeast as a whole, and the center of gravity of cultivated land migrates to the south. The change in the center of gravity of forest land and cultivated land is related to the policy of returning farmland to the forest. The construction land is generally centered around the main urban area of Luoyang City, which is related to the direction of social and economic development and urban development; (5) In terms of the driving force, rapid economic development is the main driving force for the change of land use area in the Yiluo River Basin. The promulgation and implementation of the policy of returning farmland to forest is the main reason for the change of forest land and cultivated land area. The results of this study can provide a scientific basis for the ecological protection and sustainable development of the Yellow River Basin.