长株潭核心区土地利用生态风险多尺度调控决策

Multi-Scale Controlling Decision of Land Use Ecological Risk in Chang-Zhu-Tan Core Area

根据长株潭核心区1989、1996、2000和2008年的遥感影像数据资料,提取区域土地利用变化数据进行时间、空间及功能尺度特征分析。结果表明,长株潭核心区土地利用生态风险调控的尺度选择具有多尺度性。8—9年是最佳的时间分析尺度,2km左右的分析粒径是最佳的空间分析尺度,而功能尺度则是融合了时间与空间尺度及生态功能的特征,具有更复杂的变化,并依据分析结果提出了多尺度的差异化土地利用生态风险调控策略。

Changsha,Zhuzhou and Xiangtan,the key components of Chang-Zhu-Tan urban agglomeration and the core growth pole of economy development in Hunan province,have been accelerating their economic and social development and urbanization in recent years.The research on the relationship among time,location and land use change characteristics scale from analysis on study area,on the basis of the data of land use change extracted from the remote sensing image data in four periods from 1989 to 2008 shows that the scale change in Changsha-Zhuzhou-Xiangtan core area to determine their selection in land use characteristic scale,which is supported by ：①The temporal analysis about 8 to 9 years being the most appropriate scale;②The spatial analysis about 2 km being the most appropriate scale;③The function scale emerged spatio-temporal and ecological risk of land use,combined the variation of land use,is the most complicated scale.Finally,different controlling strategy of multi-scale land use ecological risk had been proposed.