郑州市“三生空间”用地转型及其生态效应.

There are some issues in urban areas, especially in mega-cities, such as low efficiency of intensive utilization, imbalance of ecological space, production space and living space. Taking Zhengzhou City, the capital of Henan Province as an example, this paper discussed the ecological-production-living spaces land use transformation and the temporal and spatial variation generation of environmental effects, based on the four phases of land use data from 1990 to 2019 and on the basis of building the classification system of ecological-production-living spaces. The results show that the area of production and ecological land use has been decreased by 353.33 km² and 186.43 km² respectively, and the area of domestic land use has been increased by 539.76 km². Among the land use types, the largest amount of conversion is agricultural production land use, which is mainly converted to urban and rural living land use. During the study period, the center production land use mainly shifted to southeast. The center of ecological land use is moved not much, and the center of living land use is moved to the east of 3,106 m. The ecological environment quality of Zhengzhou City shows a pattern of “high in the west and low in the east” and is gradually deteriorated from 1990 to 2000. After 2000, it continues to spread in the periphery of the main urban area. The wetlands along the Yellow River and Shuanghe Lake to Yuanboyuan Park are the most improved areas in each period, showing a point distribution. There are two trends of ecological environment in Zhengzhou City: Improvement and deterioration, and the latter is much stronger than that of the former. The transfer of agricultural production land use to urban and rural living land use, water and forest land use to agricultural production land use are the two main factors of deterioration. [ABSTRACT FROM AUTHOR]