基于多源遥感数据的荒漠植被覆盖度估测-生命科学研究.pdfVIP

应 用 生 态 学 报摇 2012年12月摇 第23卷摇 第12期摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 ChineseJournal of Applied Ecology,Dec. 2012,23(12):3331-3337 基于多源遥感数据的荒漠植被覆盖度估测* ** 万红梅摇 李摇 霞 摇 董道瑞 (新疆农业大学草业与环境科学学院,乌鲁木齐830052) 摘摇 要摇 以塔里木河下游为靶区,根据地面调查和不同分辨率的多源遥感数据,逐级建立荒 漠植被覆盖度遥感估测模型,并对不同模型、不同估测方法的估测精度进行比较.结果表明: 随着遥感数据空间分辨率的提高,植被覆盖度遥感估测模型精度增加;基于高分辨率、中高分 辨率及中低分辨率遥感数据建立的植被覆盖度模型的估测精度分别为89.5%、87.0%和 84郾6%;遥感模型法的估测精度高于植被指数法.不同分辨率遥感数据估测荒漠植被覆盖度 的精度变化规律,实现了荒漠植被覆盖度估测的高、中、低分辨率遥感数据参数及尺度的定量 转换,可为研究区生态恢复遥感综合监测方案的制定和实施提供直接依据. 关键词摇 荒漠植被覆盖度摇 多源遥感数据摇 遥感模型摇 尺度转换 文章编号摇 1001-9332(2012)12-3331-07摇 中图分类号摇 TP79摇 文献标识码摇 A Estimation of desert vegetation coverage based on multi鄄source remote sensing data. WAN Hong鄄mei,LI Xia,DONG Dao鄄rui (College of Pratacultural and Environmental Science,Xinjiang Agricultural University,Urumqi830052,China).鄄Chin.J.Appl.Ecol.,2012,23(12):3331-3337. Abstract:Taking the lower reaches of Tarim River in Xinjiang of Northwest China as study area and based on the ground investigation and the multi鄄source remote sensing data of different resolu鄄 tions,the estimation modelsfor desert vegetation coverage were built,with the precisions of differ鄄 ent estimation methods and models compared. The results showed that with the increasing spatial resolution of remote sensing data,theprecisionsof the estimation modelsincreased. The estimation precision of the models based on the high,middle鄄high,and middle鄄low resolution remote sensing data was89.5%,87.0%,and 84.56%,respectively,and the precisions of the remote sensing modelswerehigherthanthat of vegetationindex method. Thisstudy revealedthechangepatternsof the estimation precision of desert vegetation coverage based o