This paper studies the spatial distribution of rural residential land of the town of Yihe, Shilong and Runxi in Chongqing, and optimizes the spatial pattern based upon their urban-rural linkages. According to the intensity of urban-rural linkage derived from gravity model, the three towns are categorized into three types of rural areas, namely industrial expansion area at urban fringe, ecological conservation districts in the suburbs and agricultural districts in remote mountainous areas. The authors construct an evaluation system, consisting of general index and featured index. Every plaque of rural residential land is classified as developing, adjusting or removing according to the result of evaluation. Three modes of optimization are concluded from the case study. The proposed method of spatial optimization focuses on the diversity of rural development and deals with challenges for rural areas in contemporary China. It contributes to a balanced urban-rural development and provides scientific evidence for the New-Type urbanization plan.

The authors introduce the development of relative researches on land use hydrological effects, and explore the sources of uncertainty of current studies. Generally, current researches, in the aspect of contents, focus on more kinds of land use forms in variable scales. Furthermore, they progress to analyze the impacts of land use allocation and distinguish the impacts between land use and climate change. As for the methods, physical-based distributed hydrological model and scenario analysis are widely used in current researches. Meanwhile, the land use/cover change models such as CA and CLUEs are employed by more and more researches. On the trajectory to modeling the complexity of linkage between land use and water resource, current researches are confronted with an increasing uncertainty so that it would be critical to quantify the uncertainty. What’s more, the potential contradiction between the objectives of land use planning and water resources management and the feedback of water resources to land use changes in the long run are worthy to be taken into consideration.

The research seeks to develop a land use ecological security pattern for the Jungar Banner in Ordos, which is a typical farming-pastoral zone with great vulnerability. The spatial-temporal dynamic change of land use during the past 30 years is analyzed firstly with physical geographical information, socio-economic statistics and multi-year land use data. Then the Minimum Cumulative Resistance (MCR) model is employed to build the suitability map of curial land use forms with GIS technology. Through judging the suitability for different land use forms from one land use unit to another, regional land use ecological security pattern is developed, which provides the basis for the management. This research extends the application of MCR models as well as its result is significant for regional sustainable land use.