提出利用遥感和GIS来获得合理的城市发展布局和减少浪费土地资源的新方法。该模型是根据环境经济学资源分配原理和可持续发展理论,通过遥感和GIS的结合来实现。模型的核心就是保证在时间和空间上合理地安排土地资源。由此评价了珠江三角洲东莞市近年来的土地开发,获得了有意义的结果。并通过模型的运算,给出了规划期内的土地利用的优化方案,以减少浪费土地资源的现象。

A sustainable land development model is developed using GIS in an attempt to control urban sprawl under rapid rural urbanization in China. The recent land development in the Pearl River Delta is out of control, resulting in excessive encroachment on the best agricultural land in many rural areas as well as the urban fringe areas. Government interventions are needed to control such development because agricultural land use can not compete with urban land use. The objective of the model is to ensure that equity between generations and efficiency in land use can be achieved in land development so that development can be sustained in the future. The model is also used to study the impacts of agricultural land loss in Dongguan in 1988—1993 by comparing the actual development with optimal development derived from the sustainable land development model. Land use problems are identified in both spatial and time dimensions as some land conversions are found to occur at the ‘wrong' time and locations. Future land development which can meet the objective of sustainable development is proposed using the model. By testing different development scenarios and land consumption parameters, planners and government officials can use the model as a decision support system for sustainable land development in China as well as other areas in the world which are under the pressure of rapid urban growth.