Method and system for determining background water temperature of thermal discharge from operating nuclear power plants based on remote sensing

A method for determining a background water temperature of thermal discharge from operating nuclear power plants based on remote sensing, comprising following steps:

• S1, collecting distributions of satellite remote sensing sea surface water temperatures with a high spatiotemporal resolution before and after nuclear power plant operations and background information of nuclear power plants, based on the distributions of the satellite remote sensing sea surface water temperatures before and after the nuclear power plant operations and the background information, selecting a water temperature reference station and water temperature estimation stations;
• S2, collecting hourly satellite remote sensing sea surface water temperatures of the water temperature reference station and the water temperature estimation stations in typical seasons before the nuclear power plant operation, based on the satellite remote sensing sea surface water temperatures with the high spatiotemporal resolution, constructing a linear relationship model of water temperatures between the water temperature reference station and the water temperature estimation stations;
• and based on the linear relationship model, screening and eliminating the water temperature estimation stations not in line with predetermined conditions;
• S3, collecting a sea surface water temperature observation value of the water temperature reference station after the nuclear power plant operation and a satellite remote sensing synchronous sea surface water temperature value after the nuclear power plant operation, correcting a value of the satellite remote sensing sea surface water temperature to obtain a corrected parameter of the linear relationship model between the water temperature reference station and the water temperature estimation stations;
• and based on the corrected parameter, obtaining background water temperatures of the water temperature estimation stations after the nuclear power plant operation;
• and
• S4, based on a water temperature of the water temperature reference station, calculating a difference value between the background water temperatures of the water temperature estimation stations and synchronous water temperatures of the water temperature estimation stations, and obtaining a temperature rise water temperature value.