基于微波冠层散射模型的水稻生物量遥感估算

为寻求有效的水稻生物量估算方法,尝试开发了微波冠层散射模型。将实测的水稻结构参数作为输入变量,运行微波冠层散射的改进模型来模拟水稻冠层后向散射系数,结合遗传算法优化工具,从星载微波雷达遥感ALOS/PALSAR数据反演水稻的结构参数,进而对水稻生物量进行了空间制图。结果显示,模拟的水稻冠层后向散射系数误差在1 dB以内,估算的水稻生物量的误差小于200 g/m2。表明利用微波遥感机理模型反演水稻结构参数和估算水稻生物量具有应用潜力。...

Full description

Saved in:
Bibliographic Details
Published in农业工程学报 Vol. 27; no. 9; pp. 100 - 105
Main Author 张远 张中浩 苏世亮 吴嘉平
Format Journal Article
LanguageChinese
Published 华东师范大学资源与环境科学学院,上海200062 2011
中国科学院东北地理与农业生态研究所,长春130012
浙江大学环境与资源学院,杭州310058%浙江大学环境与资源学院,杭州,310058
Subjects
散射模型
模型
水稻
生物量
结构参数
遥感
水稻
结构参数
生物量
遥感
散射模型
模型
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2011.09.019

Cover

More Information
Summary:为寻求有效的水稻生物量估算方法,尝试开发了微波冠层散射模型。将实测的水稻结构参数作为输入变量,运行微波冠层散射的改进模型来模拟水稻冠层后向散射系数,结合遗传算法优化工具,从星载微波雷达遥感ALOS/PALSAR数据反演水稻的结构参数,进而对水稻生物量进行了空间制图。结果显示,模拟的水稻冠层后向散射系数误差在1 dB以内,估算的水稻生物量的误差小于200 g/m2。表明利用微波遥感机理模型反演水稻结构参数和估算水稻生物量具有应用潜力。
Bibliography:11-2047/S
Zhang Yuan,Zhang Zhonghao,Su Shiliang,Wu Jiaping （1.School of Resources and Environmental Science,East China Normal University,Shanghai 200062,China;2.Research Center of Remote Sensing and Geoscience,Northeast Institute of Geography and Agroecology of CAS,Changchun 130012,China;3.College of Environmental and Resources Sciences,Zhejiang University,Hangzhou 310029,China）
remote sensing; model; biomass; paddy rice; scattering model; structural parameters
A microwave canopy scattering model was developed for estimating rice biomass effectively. Taking paddy rice biophysical parameters measured in field survey as inputs of modified microwave canopy scattering model to simulate backscattering coefficient of paddy rice canopy, the modified model was integrated with generic algorithm optimization tool （GAOT） for the inversion of rice biophysical parameters from radar data ALOS/PALSAR. And then, a rice biomass map was generated. The results showed that the estimation error of rice canopy backscattering coeffici
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2011.09.019