基于遥感和GIS的森林生产力空间格局与分异

Spatial pattern and variance of forest productivity based on remote sensing and GIS

借助遥感和地理信息系统及其集成技术,以通过克里格插值获得的闽江流域林地多年平均温度、多年平均降水量栅格图层及主要土壤质量因子栅格图层为基础,建立森林气候生产力、森林生产力和林木产量栅格图层。运用ERDAS建模功能及动态聚类方法生成闽江流域林地森林气候生产力、森林生产力及林木产量分布图。通过对各生产力空间格局和分异分析,全流域各生产力类型以高、中生产力面积占绝对优势,总体空间分布上大致呈从东南向西北略有递增的趋势,中部和西北部较高,东南和西部相对较低的状态。研究结果为闽江流域林地资源合理利用提供决策和技术支持。

The raster layer of forest climate productivity, forest productivity and sanding crop yield was constructed based on many years average temperature and rainfall data by Kriging interpolation method by means of remote sensing, GIS and other integrated technology in Minjiang watershed. The distribution map of forest climate productivity, forest productivity and sanding crop yield in Minjiang watershed was generated by used ERDAS model and dynamic cluster. Through analyzing the spatial pattern and variance of all types of productivity, the results showed that the middle and high types of area occupied absolute superiority, the overall spatial distribution of 3 types of productivity presented slightly increasing trend from southeast to northwest in general, and it was higher in middle and northwest parts while relatively lower in southeast and west parts. The results provide the decision and technology support for forest land resources rational utilization in Minjiang watershed.