青海省生态脆弱度分级1-km栅格数据集(2015)的研发与内容  

Development of Ecological Vulnerability Classification 1-km Raster Dataset in Qinghai Province of China(2015)

作　　者：支泽民 刘峰贵 陈琼 周强 Zhi,Z.M;Liu,F.G.;Chen,Q;Zhou,Q(School of Geographic Science,Qinghai Normal University,Xining,Qinghai 810008,China;Academy of plateau Science and Sustainability,Xining,Qinghai 810008,China)

机构地区：[1]青海师范大学地理科学学院,西宁810008 [2]高原科学与可持续发展研究院,西宁810008

出　　处：《全球变化数据学报（中英文）》2022年第3期409-415,V0409-V0415,共14页Journal of Global Change Data & Discovery

基　　金：中华人民共和国科学技术部(2019YFA0606902)。

摘　　要：青海省作为青藏高原的重要组成部分,对于我国生态安全屏障构建具有十分重要的作用,生态战略意义重大。本数据利用“SPR”(生态敏感性—生态压力—生态恢复力)模型,基于生态敏感性、生态压力以及生态恢复力3个准测,选取坡度、海拔、地形起伏度、土壤侵蚀敏感性、土地退化敏感性、NDVI等共12个指标构建生态脆弱度评价体系,其中原始数据中坡度、海拔与地形起伏度分辨率为30 m×30 m,土壤侵蚀敏感性、土地退化敏感性、NDVI、年平均气温、年平均降水、人口密度、GDP密度、道路密度、放牧强度数据分辨率1 km×1 km,基于随机森林模型进行权重确定对青海省生态脆弱度进行评估。最后,将研究区分为微度、轻度、中度、重度、极度五个脆弱度等级,最终数据分辨率为1 km×1 km,数据格式为.tif格式,由5个文件组成,数据大小为1.30 MB。Qinghai province,an important part of the Qinghai-Tibet Plateau,plays a critical role in establishing China’s ecological security barrier and is of great ecological strategic importance.In this study,we apply the“SPR”(ecological sensitivity-ecological pressure-ecological resilience)model to Qinghai province,whose data is based on three criterion levels of environmental concern,including ecological sensitivity,ecological pressure,and ecological resilience.Collectively,these conceptual ideas generate a total of 12 indicators.Among these indicators,slope,elevation,and topographic relief have a resolution of 30 m×30 m;while the indicators with a 1 km×1 km resolution include:soil erosion sensitivity,land degradation sensitivity,NDVI,average annual temperature,average annual precipitation,population density,GDP density,road density,and grazing intensity.The random forest method is used to determine the weighting of these indicators to assess the ecological vulnerability of Qinghai province.The study area was then divided into five vulnerability levels:slight,mild,moderate,severe,and extreme.The final dataset has a resolution of 1 km×1 km and a.tif format,consisting of five files with 1.30 MB of data.

关 键 词：青海省 生态脆弱性 随机森林 SPR模型 

分 类 号：X321[环境科学与工程—环境工程]