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基于主动微波遥感的土壤含水量估测方法研究

Study on the soil moisture estimation method based on active microwave remote sensing
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摘要 农作物长势与土壤含水量密切相关,因此在农作物生长过程中能够及时准确地估测土壤水分十分重要。研究主动微波遥感不同极化方式提取后向散射系数与地表土壤含水量之间的关系,建立土壤水分估测模型;通过分析不同地微波遥感信号基础上,建立土壤后向散射系数与土壤含水量的半经验模型,拟合VV极化、VH极化数据与土壤含水量实测数据。实验结果表明:VV极化的决定系数R^(2)=0.74,VH极化的决定系数R^(2)=0.19,相较于VH极化,VV极化的穿透性强、土壤水分含量变化更加敏感,适合用于土壤旱情监测,有助于把握最佳灌溉时机。
作者 刘钇廷 李旭 吴保升 涂巧针 LIU Yiting;LI Xu;WU Baosheng;TU Qiaozhen
出处 《南方农业》 2021年第34期155-158,共4页 South China Agriculture
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