Agricultural land sensitivity classification map of Qinghai Tibet Plateau (2015)

In this study, the cultivated land, forest land and grassland of the Qinghai Tibet Plateau in 2015 were taken as the evaluation objects to analyze the terrain, climate, soil and vegetation factors (terrain: altitude, slope; climate: sunshine hours, ≥ 0 ℃ accumulated temperature, annual average precipitation; soil: soil texture, soil erosion intensity, soil layer thickness; vegetation: vegetation type, NDVI) that have significant impact on land sensitivity and establish agriculture Land sensitivity evaluation index system. Using AHP method to determine the weight of evaluation factors, according to the ArcGIS Jerks classification method to get the sensitivity level of cultivated land, forest land and grassland, output 250m resolution of the Qinghai Tibet Plateau agricultural land sensitivity map, and verify the results.

本研究以2015年青藏高原的耕地、林地和草地为评价对象，分析对土地敏感性具有显著影响的地形、气候、土壤和植被因子（地形：海拔、坡度；气候：日照时数、≥0℃积温、年平均降水量；土壤：土壤质地、土壤侵蚀强度、土层厚度；植被：植被类型、归一化植被指数（NDVI）），并建立农业用地敏感性评价指标体系。采用层次分析法（AHP）确定评价因子权重，依据ArcGIS Jerks分类法得到耕地、林地和草地的敏感性等级，输出分辨率为250米的青藏高原农业用地敏感性图，并对结果进行验证。