Hotspots detection and driving forces analysis of land use functions on geographical grid scale

On the basis of defining land use function conception and classification, this paper selects 12 indices from land use, environment and social-economic development conditions, and selects Analytical Hierarchy Process (AHP) method to identify land use functions distribution of Harbin-Daqing-Qiqihaer region in the northeast of China of the year 1976 and 2005 on geographical grid scale. Spatio-temporal changing hotspots of land use functions in the past thirty years are analyzed. The results show that correlativity between resources provision function and other functions are negative, which means functional land use conflicts. Grassland and unused land convert to farmland continually under the increase of temperature and food demand are the dominant factors that influence functional changes. However, urban expansion will become a new notable factor in the coming future.