基于GIS与Geo-CA模型的半干旱区土壤盐碱化动态模拟研究

土壤盐碱化是半干旱地区土壤退化的重要表现形式之一,其发生发展是一个复杂的非线性动力学过程.利用地理元胞自动机对复杂系统时空动态演化过程具有较强的计算与模拟能力的特点,以吉林省西部盐碱化土地为研究区,在GIS的支持下系统分析了土壤盐碱化的特征及其影响因子,建立了基于Geo-CA的土壤盐碱化动态模型,模拟了吉林省西部土地盐碱化发生发展的时空动态规律.

Studys on the modeling of soil salinization in semi-arid area based on GIS and Geo-CA model

As one of the principal aspects of soil degradation in semi-arid area, soil salinization has affected economic sustainable development of this region, so it is more important to imitate its changing and developing in spatiotemporal. The CA model possesses the feature of imitating the evolution of complicated system in time and space and the coupling of CA and GIS fixes in with the soil salinization. Semi-arid area in Jilin Province is one of the more serious area in soil salinization and both the area and the degree present the tendency of increasing, which impacts the sustainable development. Taking it as example to try out to establish the CA model of soil salinization, it must be analysis the feature of soil salinization system so that to ascertain the impacting factors at fist and then establish the related database. The imitating of the change and the development of soil salinization in spatiotemporal based on the CA model at GIS's back has the directing significance to the prevention and governing of soil salinization and its sustainable development of economy in semi-arid area in Jilin Province.