中文摘要：

旅游小镇是近年旅游业发展的重要热点和乡村城镇化的主要方向之一。研究采取参与式农村评估（PRA）、GIS和高清遥感图像相结合的方法，反演了1986-2010年旅游城镇三坡镇土地利用的演变过程。结果显示：其土地利用在空间上表现为离心扩散和向心集聚交替，集约程度不断提高；扩张速度经过了缓慢增长（1986-1995年），快速扩展（1995-2005年），稳定发展（2005-2010年）3个阶段；在功能变化上，由传统城镇的单一功能向多元旅游功能转变。以旅游住宿、餐饮、购物、娱乐用地不断扩展为核心，旅游企业空间集聚成为旅游城镇成长的主要形式。在驱动机制上，以自然地理环境约束为基础，外部旅游市场需求拉动，市场主体的理性选择和政府干预与调控等成为旅游城镇用地演变的主要动力。

英文摘要：

Tourism town is a hot issue in the process of tourism industrial development as well as one of the main directions of rural urbanization in recent years. By combining methods of PRA （Participatory Rural Assessment）, GIS and high-definition remote sensing images, this study examines the evolution of land use pattern in Sanpo town in recent 25 years. The results are shown as follows. Firstly, centrifugal diffusion and centripetal agglomeration alternate in the spatial layouts of land use patterns. Meanwhile, land-use intensive degree increases constantly. Secondly, the expansion of construction land has gone through three periods： slow growth stage （1986-1995）, rapid expansion stage （1995-2005） and stable development stage （2005-2010）. Thirdly, from the function shift aspect, the function of construction land changes from the single function of traditional town to the multiple tourism function of tourism-town. Furthermore, centralization in the expansion of tourism land-use, such as tourist accommodation, catering, shopping and entertainment, spatial agglomeration of tourism enterprises has become the main development type of tourism-town. Finally, from the driving mechanism aspect, based on the natural geographical features, demand of external tourism market, rational choice of the market subjects, government intervention and regulation have become the main driving force in the evolution of land use in tourism town.