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基于林分结构响应的PALSAR森林结构参数估测

赵明瑶 刘会云 张晓丽 焦志敏 姚智 杨铭

赵明瑶, 刘会云, 张晓丽, 焦志敏, 姚智, 杨铭. 基于林分结构响应的PALSAR森林结构参数估测[J]. 北京林业大学学报, 2015, 37(6): 61-69. doi: 10.13332/j.1000-1522.20140402
引用本文: 赵明瑶, 刘会云, 张晓丽, 焦志敏, 姚智, 杨铭. 基于林分结构响应的PALSAR森林结构参数估测[J]. 北京林业大学学报, 2015, 37(6): 61-69. doi: 10.13332/j.1000-1522.20140402
ZHAO Ming-yao, LIU Hui-yun, ZHANG Xiao-li, JIAO Zhi-min, YAO Zhi, YANG Ming. Estimation of forest structural parameters based on stand structure response and PALSAR data[J]. Journal of Beijing Forestry University, 2015, 37(6): 61-69. doi: 10.13332/j.1000-1522.20140402
Citation: ZHAO Ming-yao, LIU Hui-yun, ZHANG Xiao-li, JIAO Zhi-min, YAO Zhi, YANG Ming. Estimation of forest structural parameters based on stand structure response and PALSAR data[J]. Journal of Beijing Forestry University, 2015, 37(6): 61-69. doi: 10.13332/j.1000-1522.20140402

基于林分结构响应的PALSAR森林结构参数估测

doi: 10.13332/j.1000-1522.20140402
基金项目: 

“863”国家高技术研究发展计划项目(2012AA102001)。

详细信息
    作者简介:

    赵明瑶。主要研究方向:3S技术在资源环境中应用。Email:zhaomingyao0226@bjfu.edu.cn 地址: 100083北京市海淀区清华东路35号北京林业大学林学院。责任作者: 张晓丽,教授,博士生导师。主要研究方向:3S系统集成与开发、3S技术在资源环境中应用、定量遥感。Email:zhang_xl@263.net 地址:同上。

    赵明瑶。主要研究方向:3S技术在资源环境中应用。Email:zhaomingyao0226@bjfu.edu.cn 地址: 100083北京市海淀区清华东路35号北京林业大学林学院。责任作者: 张晓丽,教授,博士生导师。主要研究方向:3S系统集成与开发、3S技术在资源环境中应用、定量遥感。Email:zhang_xl@263.net 地址:同上。

Estimation of forest structural parameters based on stand structure response and PALSAR data

  • 摘要: 为提高ALOS PALSAR数据估测森林结构参数的精度,引入代表林分结构复杂程度的调整熵值(ENTadj)参与估测,以消除林分结构对雷达后向散射系数的干扰。首先利用野外样地实测的树高计算林分的调整熵值,与Landsat8 OLI第6波段建立线性回归模型,获得基于像元的调整熵值。一般森林结构参数与ALOS PALSAR后向散射系数之间的关系可以用对数模型模拟。引入基于像元的调整熵值作为自变量对原始对数模型进行改进,分别对林分平均高、林分平均胸径、林分蓄积量建立了3种形式的改进模型。利用原始模型和改进模型分别对杉木林、马尾松林、阔叶林和针阔混交林的上述森林结构参数进行估测。最后比较模型拟合精度筛选出3项森林结构参数在各类森林中的最优模型,共计12个。结果表明:考虑林分结构干扰后,雷达估测森林结构参数模型的拟合精度R2均得到了提高。马尾松林各项森林结构参数模型的拟合度提高最大。精度检验结果表明:林分平均高估测精度(RMSE为0.74~2.51 m)、林分平均胸径估测精度(RMSE为2.61~5.61 cm)和林分蓄积量估测精度(RMSE为21.71~30.92 m3/hm2)都比较理想。本研究探讨了林分结构信息应用于合成孔径雷达后向散射系数反演森林结构参数方面的潜力,提高了光学数据结合雷达数据估算森林结构参数的能力。

     

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  • 收稿日期:  2014-10-31

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