Multi-temporal Remote Sensing Temporal Disturibution Of The Thermal Discharge Of The Daya Bay Nuclear Power Plant And The Analysing Of The Influence Factors.

The nuclear Power technology solve the problem of energy shortage.However,thermal discharge from the nuclear Power Plants affect the coastal environment. Thermal discharge could make the sea surface temperature increase dramatically in some extent,which accelerates the chemical reaction rate and reduces the reproductive rate of the aqutic organism. The temperature rising of the sea water could changes the quality of water. The temperature rising could influent the coastal organisms. It not only changes the custom of life, growth and reprodictivity, but also makes them be extinct completely. Therefore,monitoring by Remote Sensing method is one of the most important methods to monitor the thermal discharge of the nuclear Power Plants,in order to keep the healthy coastal environment and ecological system.The nuclear power plant thermal discharge monitoring, the traditional methods are mainly depend on the coastal marine stations, ships sailing, or buoys point measurement. These methods have weaknesses of poor data synchronization, which result that it could not directly reflect the characteristics of the spatial structure and the change of space-time of the temperature field. What’s more, these methods are time-consuming and energy-consuming. However, they are high accuracy and become authenticity testing means and the important information supplements of satellite remote sensing technology. The basic principle of thermal infrared remote sense monitoring is the inversion of water surface’s temperature. It has the advantages of low cost, high speed, large-area simultaneous observation and so on. With the enhancement of spatial and temporal resolution of thermal infrared remote sensing systems, satellite remote sensing technology will be the first choice of nuclear power plant thermal discharge monitoring and evaluation in the future.Based on the 69 cloudless satellite remote sensing data of HJ-1B acquired between 2009-2013, the study carried out data preprocessing, land and water separation, sea surface temperature inversion and the reference temperature extraction. We study the regular thermal diffusion thermal discharge under the factors of the tide, wind, work-conditions and season, also we study the impact on the Daya Bay Nature Reserve of the nuclear power plant thermal discharge. Studies have shown that: 1) thermal diffusion is affected by the tidal flow rate largely, large, medium tide and wind from west to east are more conducive to high-temperature water diffusion. 2) The impacts of the season to the thermal diffusion show: 1?C, 2?C temperature-rise area is larger in summer than that in winter, and the temperature-rise area in summer rise approximately 1.005 to 1.484 than that in winter. 3?C, 4?C temperature-rise area is smaller in summer than that in winter, and the temperature-rise area in winter rise approximately 1.005 to 1.484 than that in summer. 3) With the increase of nuclear power plant units, the total temperature-rise area keeps increasing either in summer or in winter, the increasing area is between 0.7 ~ 6.3 km2 and the increasing area of 2km2 is most welcome. But if the work units have 3,4,5,6, the 4?C mean temperature-rise area is within 1 km2. 4) Impact on the surrounding environment analysis showed, 1 ? C temperature rise envelope region of the Daya Bay Nuclear Power Base thermal discharge covers a large part of the central core region., 2?C temperature-rise envelope region covers a small part of the central core area, 3?C, 4?C temperature-rise envelope region are not in the central core area region. It does not exceed the ‘water quality standard’(GB3097-1997) the first and second water quality objectives, it has limited impact on the growth and reproduction of plants and animals in the core area.