Irrigation water effective utilization coefficient measuring and calculating method based on remote sensing

The invention discloses an irrigation water effective utilization coefficient measuring and calculating method based on remote sensing, and the method comprises the steps: (1) obtaining a remote sensing image containing visible light and thermal infrared bands, and carrying out the preprocessing; (2) acquiring meteorological data and digital elevation model data; (3) acquiring irrigation water consumption data of each time in the irrigation area; (4) calculating the total evapotranspiration of the irrigation area; (5) acquiring soil type data, land utilization data, vegetation data and precipitation data, and calculating the total surface runoff in the irrigated area through a hydrological model; and (6) measuring and calculating the effective utilization coefficient of irrigation water. The method overcomes the defects that an existing head-tail measuring and calculating method is high in requirement for the agricultural metering rate, typical fields are difficult to select in the actual operation process of