Evaluation of Land Sustainable Use Based on Matter-Element Model

The land is foundation of human survival and development, land sustainable use is related to human survival and development. Taking Daqing City as an example, the paper constructs evaluating indicator system basing on the characteristics of Daqing's land. Combining the entropy theory and the matter-element to construct the evaluate model, the paper evaluates the land sustainable use degree with macroscopic view. The results indicate that the land sustainable use degree of Daqing has been an increase trend. Within the subsystems, the natural resources system presents sustainable and unsustainable degree in the year of 1987 and 2005. The social economic system presents unsustainable degree and the ecological landscape system presents comparative sustainable degree in 1987 and 2005. On the same time, there are some unsustainable indicators threaten the land sustainable use, such as the great density of oil well, the low fraction of forest coverage, the high proportion of the land for industrial and mining use, the high energy consumption per ten thousand yuan GDP.