地理国情支撑下的祁连山生态状况精细化评价

Fine evaluation of ecological status in the Qilian Mountains based on national geographic conditions data

针对我国祁连山区的生态对当地社会经济及西北地区的生态安全的重大意义与及时、精准地掌握该地区生态状况的需求,该文以地理国情数据为基础,结合遥感影像和行业专题数据,以30 m栅格为单元对青海祁连山区2014—2020年生态状况进行精细化空间化分析与评价。结果表明,青海祁连山地区整体生态状况以“良”为主,80%以上区域生态状况为“一般”以上,仅在气候环境恶劣、不适宜动植物生存的高海拔山峰附近及植被覆盖较低、污染较重的城镇区域为“差”或“较差”。2014—2020年,该地区生态环境状况基本稳定,受植被覆盖指数影响,生态状况指数(EI)先增后降,生态状况略微变差。

In view of the importance of the Qilian Mountains for local society and economy and the ecological security of western China,meanwhile the need to timely and precisely know ecological status in the Qilian Mountains,in this paper,the national geographical conditions data,remote sensing images and thematic data were used to evaluate ecological status and change in this district with grid as the basic unit.The results showed that the overall ecological status level of the Qilian Mountain was“fine”.More than 80%area’s ecological status level were better than“normal”,and“poor”or“bad”ecological status only occurred near high-altitude peaks and urban areas.From 2014 to 2020,the ecological status of this region was basically stable,and the EI value increased at first and then decreased due to the influence of vegetation coverage index,which leaded to a slightly deterioration of ecological index.