基于NDVI的油松天然林生长状况的遥感监测研究

以黄土高原油松天然林为研究对象,以TM影像为主要数据源,选择能最佳表达研究区油松林信息的植被指数以及植被指数与盖度之间的回归模型,从遥感影像计算NDVI,并获取研究区油松林的盖度信息,反映油松林的生长状态。结果表明,研究区油松林90%以上的覆盖度超过50%,说明蔡家川林场天然油松林的生长状态良好。并对研究成果经过实地验证,通过植被指数获得的油松林覆盖度信息与实地调查结果吻合度达92%,这说明利用植被指数进行油松天然林生长状态的评价是可行的。

A Study on Remote Monitoring of the Growth Status Natural Forests of Chinese Pine Based on the NDVI

Taking natural forest of Chinese pine in loess plateau as research object,by the TM image as primarily data pool,choose the proper model and vegetation index that can best express the relation between vegetation index and forest coverage.Calculateing NDVI from the remote sensing image,and gain cover information of Chinese pine that reflection Chinese pine's growth condition.The result indicated,above 90% of Chinese pine's coverage in research area surpasses 50%,it explained that natural Chinese pine in Cai Jiachuan growed well.Through testing of the research results,coverage information from the NDVI is properly matching the coverage information from on-the-spot investigation,this indicated that evaluatating growth condition of Chinese pine natural forest with the vegetation index is feasible.