Method for establishing content monitoring model of canopy water of winter wheat based on spectral parameters

US10845243B1 · kind B1 · utility

Assignee

• China Institute of Water Resources and Hydropower Research · CN

Inventors

• Baozhong ZHANG · Beijing, CN
• Zhigong PENG · Beijing, CN
• Zheng Wei · Dongguan, CN
• He CHEN · Palatine, US
• Shaozhe Lin · Beijing, CN
• Jiabing CAI · Beijing, CN
• Lu Liu · Shanghai, CN
• Nana Han · Beijing, CN
• Qian Zhang · Cypress, US

Key dates

• Filing date: May 20, 2020
• Grant date: Nov 24, 2020
• Expiry date: May 20, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2021/8466
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for establishing a monitoring model of a water content of a winter wheat canopy based on spectral parameters, includes the following steps: measuring a spectral reflectance and a water content of the winter wheat canopy; constructing the spectral parameters through the spectral reflectance; wherein, the spectral parameters comprise spectral transformation forms and “trilateral” parameters; performing correlation analysis on the water content of the winter wheat canopy and the spectral transformation forms and the trilateral parameters, selecting comprehensive spectral parameters with a significant correlation for each growth stage, performing principal component analysis on the comprehensive spectral parameters, separately constructing a water content monitoring model for each growth stage, and combining the water content monitoring model for each growth stage into the monitoring model of the water content of the winter wheat canopy for the whole growth stage.