面向生态系统服务功能优化的建设用地扩张模拟——以徐州市为例

Simulation of Urban Spraw lunder Ecosystem Service Optimization:A Case Study of Xuzhou City

城市扩张与生态保护矛盾突出,在规划层面统筹考虑城市生态系统服务功能的优化,成为解决该矛盾的关键。本研究构建了基于生态系统服务功能的阻力面模型,并在徐州市2020年建设用地扩张模拟中,将其与传统的CA-Markov土地扩张预测模型比较。发现在面向生态系统服务的阻力面模型中,其建设用地扩张侵占较少的生态用地,且建设用地的破碎化程度低,连接度高,建设用地呈现内嵌式和连片式扩展,阻力面模型可以获得更好的生态系统服务功能保持效果。

The conflict between urban sprawl and ecological protection is serious. The key to resolve this issue is to consider the improvement of ecosystem services in the urban planning stage. This study constructed a resistance model based on ecosystem services. The resistance model was compared with the CA-Markov model, which is a traditional model to simulate land use change. In the simulation of Xuzhou＇s urban sprawl, this paper found the following results. Compared with CA-Markov model, urban sprawl occupied less ecological land in the resistance model. And in this model, construction land has low fragmentation degree and high connection degree, and urban sprawl is embedded and continuous. The resistance surface model can maintain better cities＇ ecosystem services.