基于GIS技术的藏药材渣驯在西藏自治区境内出露与蕴藏区域空间分布研究

Study on the Spatial Distribution of the Exposure and Reserves of Tibetan Medicinal Zhaxun in the Tibet Autonomous Region based on GIS Technology

系统分析西藏自治区出露的藏药材渣驯的空间分布特征,为其资源的可持续利用与保护提供科学依据。实地调研测取渣驯出露点的地质类型、地貌特点、高程、坡度、分布植被类型及年平均温度6个生态影响因子。利用ArcGIS10.8软件,结合西藏自治区的GIS数据,对影响因子进行空间叠加分析,以预测藏药材渣驯在西藏自治区内的空间分布。结果显示:(1)西藏自治区内藏药材渣驯资源主要分布于日喀则市、山南市、林芝市、拉萨市及阿里地区的共计30个县;渣驯出露点多数位于高山峡谷河流区域的悬崖峭壁、岩层缝隙或洞穴中;主要位于古近纪、三叠纪、白垩纪地层中;广泛分布于郎钦藏布、象泉河、马甲藏布河流域等10个流域。(2)GIS技术预测范围成功覆盖了实际采样的6个验证点,证明了该研究方法的科学性和可行性,值得在相关领域进一步推广和应用。

This study aims to systematically analyze the spatial distribution characteristics of exposed Tibetan medicinal Zhaxun in the Tibet Autonomous Region,providing scientific evidence for their sustainable utilization and conservation.Conducted on-site measurements of six ecological impact factors related to the exposure points of Tibetan medicinal Zhaxun,including geological types,geomorphological characteristics,elevation,slope,distribution of vegetation types,and annual average temperature.Using ArcGIS 10.8 software and GIS data of the Tibet Autonomous Region,the research team performed spatial overlay analysis of the gathered impact factors from field research to predict the spatial distribution of Tibetan medicinal Zhaxun within the Tibet Autonomous Region.Validation of GIS prediction results was conducted through sampling based on field investigation data.The resultes show that:(1)Tibetan medicinal are primarily distributed in 30 counties across Shigatse City,Shannan City,Nyingchi City,Lhasa City,and Ngari Prefecture within the Tibet Autonomous Region.Most residues are found in cliff faces,rock crevices,or caves within high mountain valleys and river areas.Mainly located in formations from the Paleogene,Triassic,and Cretaceous periods,widespread across ten river basins including the Langqin Tsangpo,Xiangquan River,and Majia Tsangpo River basins.The GIS technology successfully covered the predicted range of six validation points sampled in actual fieldwork,validating the scientific rigor and feasibility of this research approach.(2)This study successfully analyzed the spatial distribution characteristics of Tibetan medicinal Zhaxun in the Tibet Autonomous Region through a combination of field surveys and GIS technology.The resulting predictions not only provide clues for future surveys and research on Tibetan medicinal resources but also offer a scientific basis for the sustainable utilization and conservation of Tibetan medicinal Zhaxun resources.