Modeling man-land tensity of Chinabased on 1km grid data
基于公里格网的中国人地关系紧张度定量模拟

Man-land tensity,a value that quantitatively indicates the tension between human activity and physical environment,can be calculated by function with human pressure on the physical environment and environment carrying capacity to the human activity.A man-land tensity model is put forward in this paper through three steps.Firstly,the Environment Carrying Capacity Model(EC) is built by using the idea of Land Carrying Capacity Model and Ecological Footprint Model for reference.EC comes from the physical capacity normalized by Equivalence Factor and Yield Factor,and modified by human factors of city distribution and transport network density.Secondly,integrating production and consumption,the Human Activity Pressure Model(MP) is set up with 1 km population and GDP data.Thirdly,the Man-Land Tensity Model(MLT) is constructed based on EC and MP at 1km grid data platform.Compared with the previous research based on administrative region,1km grid is smaller on grain size and it can present the more detailed areal differentiation.The result shows that,the high-value of man-land tensity has a spot-shaped or belt-shaped distribution at cities or their suburbs or along the main economic axes,where the human activity is intense.The highest value area appears in the Pearl River Delta,the Yangtze River Delta and the Beijing-Tianjin-Hebei Metropolitan Region.The middle-value zones are distributed in North China Plain,the Two-Lake Plain(in Central China),Sichuan Basin,etc.The ecological environment is fragile in West China,where the human activity exists mainly in cities and the farming-pastoral zones,and here are distributed the high-value zones of man-land tensity.