基于GIS的阴山北麓地区土地生态安全评价  

Assessment based on the geographic information system for the land ecological security as to the area of northern side of Yin Mount

作　　者：张宏伟[1] 阿如旱[1] 孙紫英[1] 包亮[1] 

机构地区：[1]内蒙古农业大学生态环境学院,呼和浩特010018

出　　处：《安全与环境学报》2017年第6期2421-2426,共6页Journal of Safety and Environment

基　　金：内蒙古教育厅项目(NJZY12097)

摘　　要：以阴山北麓地区为研究区,利用遥感影像数据、图形矢量数据、统计监测数据,运用GIS空间叠加法,以30 m×30 m栅格为评价单元,对土地生态安全状况进行分析和评价。结果表明:2013年阴山北麓地区土地安全级别、较安全级别、较不安全级别和不安全级别区域面积分别占研究区总土地面积的18.48%、58.31%、20.95%、2.26%;研究区土地生态安全空间分异特征明显,土地生态安全状态以安全和较安全状态为主,土地整体生态安全状况良好。The purpose of this paper is to introduce a report of its investigation and evaluation results for the land ecological security situation of the northern side of Yin Mount with the description of the geographical information system（ GIS）. In the paper,we have quoted the principal information data sources from the satellite remote sensing data results,graphics vector data,as well as the statistical monitoring data. According to the regional features,we have set up an evaluation index system of the land ecological security for the aforementioned area by means of the＂natural-economic-social＂framework model,and given a description of the confident specific indexes. And,next,efforts have been made to apply the AHP to determining the weights of the indexes,an important step to work out the land ecological security indexes in combination with the GIS spatial overlay method and the comprehensive index model. The results of our investigation reveal that the safety value tends to be greater while the land ecological security status remains still better. Judging by the above said model,the land ecological security can be categorized into higher grades.Technically speaking,the land ecosystem in the said northern side of Yin Mount in 2013 can be classified into four grades（ the safe grade,17 966. 90 km^2,accounting for 18. 48% of the total area; the comparatively safe grade,56 707. 04 km^2,58. 31%;the comparatively unsafe grade,20 378. 06 km^2,or 20. 95%;the unsafe grade,2 198. 53 km^2,or 2. 26%）. The said safe grade is mainly made up of the middle area grasslands and eastern hillsides,whereas the comparatively safe grade tends to cover widely all the areas under study. On the other hand,the comparatively unsafe grade and unsafe grade areas are mainly scattering in the western,eastern and southerner areas of the quoted northern side of Yin Mount. Thus,it can be concluded that the land ecological security in the northern side of Yin Mountain turns to be sound on the whole and comparatively safe. What is more,the la

关 键 词：环境学 土地生态安全 综合评价 栅格 阴山北麓地区 

分 类 号：X171.1[环境科学与工程—环境科学]