区域环境与生态
陈鹏.基于遥感和GIS的景观尺度的区域生态健康评价——以海湾城市新区为例[J].环境科学学报,2007,27(10):1744-1752
基于遥感和GIS的景观尺度的区域生态健康评价——以海湾城市新区为例
- Ecological health assessment at the landscape scale based on RS and GIS,A case study from the New District of a Bay-type city
- 摘要：依据PSR概念模型,建立了景观尺度的区域生态健康评价指标体系.以2004年SPOT5影像及其派生数据作为基础信息源,在遥感和GIS技术支持下获取了生态健康评价相关宏观生态指标,评价的指标体系划分为5个等级.采用空间单元网格(2km×2km)作为评价单元,借助GIS的空间分析功能制作出各单项指标和综合指标的空间分布图,并完成对区域生态健康的综合评价.得到了区域生态健康的空间分布,综合评价结果划分为很健康、健康、亚健康、不健康和疾病5个等级.结果表明,生态健康处于亚健康及其以下类型的面积占整个区域的52.76%,生态系统退化有在整个研究区域蔓延的趋势.
- Abstract：Ecological health is a new goal for environment management and sustainable development.Diagnosis of ecological health associated with spatial distribution analysis can provide a reference for landscape ecological restoration and pattern optimizing.In this study,an assessment system of ecological health on the landscape scale is established according to a pressure-state-response(PSR) conceptual model.These correlative ecological indices for ecological health assessment are extracted using SPOT5 images(from 2004) and its derivative data as basic information resources,with the support of remote sensing(RS) and geographical information system(GIS) data.Accordingly,the index system is classified into five grades,"I,II,III,IVand V".Spatial unit grids(2 km×2 km) were selected as assessment units,and the spatial analysis? function of GIS was applied to create a spatial distribution map of each single index and general indices.Therefore,an overall evaluation of regional ecological health is realized,and the spatial distribution pattern of regional ecological health is also revealed.General evaluation results are classified into five different grades(including very healthy,healthy,sub-healthy,unhealthy,sick).When applied assess the health of Xiang’an district,the results indicated that 52.76% of the whole area were classified as sub-healthy or below,and ecological degradation is spreading over the whole study area.
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