Method for reckoning environmental background water temperature and calculating temperature rise in temperature rise area of newly-built coastal power plant

A method for reckoning environmental background water temperatures in a temperature rise area of a coastal power plant, comprising:

• Step01, before an operation of the coastal power plant, selecting at least one position based on background characteristics of a hydrological environment of a discharge port of the coastal power plant on a shore or in a sea at a sea area surrounding the discharge port of the coastal power plant to build at least one water temperature reference station;
• wherein a station position of the at least one water temperature reference station is not more than 20 km away from the discharge port of the coastal power plant, and characteristics of a water depth, a sea current and a sea surface heat flux are the same as characteristics of the sea area surrounding the discharge port of the coastal power plant, and are not affected by cold and heat sources, and coastlines surrounding the water temperature reference station will not be artificially changed in a future;
• calculating a maximum temperature rise envelope of the warm water discharge through a temperature rise mathematical model, and selecting sites within the maximum temperature rise envelope range of the warm water discharge to build a plurality of other water temperature observation stations;
• when building the plurality of other water temperature observation stations, according to the maximum temperature rise envelope calculated by the temperature rise mathematical model and a present situation of sea area development and utilization, selecting suitable positions for building the plurality of other water temperature observation stations on temperature rise envelopes of 1° C., 2° C., 3° C. and 4° C., and selecting two or three of the plurality of other water temperature observation stations for each of temperature rise envelopes to carry out a water temperature observation in seasons;
• in addition, setting up 3 or more the other water temperature observation stations between a temperature rise range of 1° C. temperature rise and 0.5° C. temperature rise given by the temperature rise mathematical model;
• the water temperature reference station is the same as the plurality of other water temperature observation stations in terms of sea current distribution characteristics, water depth topography characteristics and meteorological conditions, and a distance between the water temperature reference station and the other water temperature observation stations is less than 30 kilometers, there is a linear relationship in the environmental background water temperatures monitored by the water temperature reference station and the plurality of other water temperature observation stations;
• the environmental background water temperatures are observed values of sea surface water temperatures not affected by heat sources of the coastal power plant through a probe on a sea surface;
• the probe on the sea surface is arranged at a distance of 0.5 meter from the sea surface;
• Step02, carrying out a synchronous continuous observation of the sea surface water temperatures of the water temperature reference station and the plurality of other water temperature observation stations, and recording the environmental background water temperatures of the water temperature reference station and the plurality of other water temperature observation stations;
• Step03, analyzing the environmental background water temperatures obtained in the Step02, and building a linear relationship of the environmental background water temperatures between the water temperature reference station and each of the plurality of other water temperature observation stations, wherein the linear relationship comprises a seasonal linear relationship, and the linear relationship is B=AX+C, wherein B represents environmental background water temperatures monitored by water temperature observation stations, A represents an environmental background water temperatures monitored by the water temperature reference station, and X and C are correlation coefficients;
• and
• Step04, after the operation of the coastal power plant, continuously observing the environmental background water temperatures of the water temperature reference station, and according to the environmental background water temperatures of the water temperature reference station, reckoning and obtaining the environmental background water temperatures of each of the plurality of other water temperature observation stations through the linear relationship of the environmental background water temperatures between the water temperature reference station and each of the plurality of other water temperature observation stations obtained in the Step03.