项目名称: 合成孔径雷达数据反演内蒙古草原土壤湿度机理研究
项目编号: No.61461040
项目类型: 地区科学基金项目
立项/批准年度: 2015
项目学科: 无线电电子学、电信技术
项目作者: 黄平平
作者单位: 内蒙古工业大学
项目金额: 45万元
中文摘要: 合成孔径雷达(Synthetic Aperture Radar, SAR)数据反演土壤湿度是国内外研究的热点和难点。准确、快速、大尺度获取时空动态的土壤湿度信息,在植被长势预测、生态模型建立等方面具有不可替代的作用。本课题拟对内蒙古草原不同植被生长期的土壤湿度反演进行深入研究。研究内容及关键科学问题包括:针对裸土或稀疏草原区土壤经验参数特点,开展单极化SAR数据土壤湿度反演方法研究;针对茂盛草原区土壤及植被经验参数特点,开展双极化SAR数据土壤湿度反演方法研究;针对全极化SAR数据反演植被茂盛草原区土壤水分的需要,开发适用于草原地区的极化分解方法,将体散射有效分离,进而根据表面散射信息提取土壤湿度。课题内容的设置对内蒙古草原地区指导畜牧业生产,保护生态环境有积极意义。
中文关键词: 合成孔径雷达;极化;反演;土壤湿度;草原
英文摘要: The application of Synthetic Aperture Radar data to monitor soil moisture has become a hot research issue in recent decades. We need to acquire soil moisture information on a large scale accurately and rapidly, it plays a significant role in the vegetation growth forecasting and ecological environment modeling. In this research project, we intend to study the soil moisture inversion deeply for different vegetation growth phases in Inner Mongolia, including: the inversion method using single polarimetric SAR data for bare soil or sparse vegetated grassland; the inversion approach employing dual polarimetric SAR data for vegetated grassland; the polarimetric decomposition techniques for vegetated grassland, which can be used to remove the volume scattering contribution in order to retrieve the soil moisture from surface scattering contribution. Therefore, this study is beneficial for the stock farming and ecological environment protection in Inner Mongolia grassland.
英文关键词: Synthetic Aperture Radar(SAR);Polarimetric;Iversion;soil moisture;Grassland