基于多源空间信息的湖南省生态环境综合评价

采用多源空间信息,在地理信息系统和遥感技术的支持下,构造以栅格数据为主的数字环境.通过建立省域尺度生态环境综合评价指标体系与评价模型,在空间叠加分析基础上,对湖南省生态环境进行了综合评价,并研究了区域生态环境的空间分异格局.研究结果表明,湖南生态环境综合指数呈正态分布,总体环境状况一般,中等及以下等级的区域占全省总面积的65.01%.在空间格局上,大体表现为由东向西逐渐变差的态势,但局部有差异,这主要与各区域的自然条件、灾害状况及社会经济发展水平等有较强的相关性.

Synthetic Assessment of the Eco-Environment of Hunan Province Based on Multi-Source Spatial Information

Supported by remote sensing(RS) and geographical information system(GIS),this paper adopted multi-source spatial information to construct the digital environment model for areas made of grid data.Through overlay analysis of the synthetic assessment model,the assessment results were achieved,meanwhile,the spatial distribution of the regional eco-environment was studied.The results indicated that the index of eco-environment assessment of Hunan Province was almost symmetric,in which the third and relatively poor grade accounted for 65.04 percent of the whole.From the spatial distribution,the eco-environment quality turned from bad to worse gradually from the east to the west with exception in a few areas,which had strong relativity compared to changing trend of natural condition,climate factor,disaster and status of resource utilization.