摘要
以2006年和2009年两期遥感影像为信息源,基于GIS和RS,对长乐市进行土地利用变化的生态风险研究,利用景观干扰度指数和景观脆弱度指数,构建生态风险指数.运用网格模型,采用普通克里格法对生态风险指数进行插值,编制长乐市生态风险空间分布图,对插值结果图进行归一化等级划分,揭示生态风险时空演变特征,并借助地统计学中的空间自相关方法对生态风险度进行粒度效应分析与空间自相关分析.结果表明,长乐市生态风险等级高的区域面积在增长,等级低的区域在不断减少,生态风险的空间分布具有层次性和区域性,且存在一定的空间正相关关系,随着空间粒度增大,呈下降的趋势.
In this paper, a study of land use eco - risk assessment was discussed in the Changle city, using GIS and RS technology, two remote sensing images of 2006 and 2009 were the basic data sources, the eco - risk index was constructed based on landscape disturbance index and landscape fragility. The maps of the spatial distribution of eco - risk and the eco - risk level that obtained using the grid model, ordinary Kring and normalization methods were analyzed, which to reveal the spatial temporal evolution characteristics of eco - risk. The grain size effect and the spatial autocorrelation of the eco -risk degree were also analyzed in this article. The conclusions from the study showed that： the area of the high eco - risk was increased, the area of the low eco - risk was decreased and the spatial distribution of eco - risk has hierarchical and regional characteristics. Eco - risk degree was positive correlation, and a decreasing trend exited with the increasing of grain size.
出处
《福州大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第1期62-69,共8页
Journal of Fuzhou University(Natural Science Edition)
基金
福建省自然科学基金资助项目(2011J05109)
