基于遥感技术的田湾核电周边海域环境监测

Sea Region Environment Monitoring Surrounding Tianwan Nuclear Power Plant Based on Remote Sensing Technology

基于Landsat5、Landsat8卫星数据,开展田湾核电周边海域岸线和海域温度场的信息提取,分析研究了田湾核电附近海域环境的分布变化特征。结果表明,2008—2020年田湾核电周边工程建设明显增加,周边海域环境变化显著;核电运行前,排水口附近海域未出现明显温度分异,核电运行后,温排水海域具有明显温升现象;核电周边工程建设改变了海域流场,保护了核电冷却水取水安全,但不利于温排水扩散,导致温升分布向东南偏移,温升面积增大;二期3、4号机组扩建后,温升面积进一步增加,1℃以上温升增加约12.11%,4℃以上温升增加约6.98%。遥感技术能有效监测核电周边海域环境变化情况,满足核电对周边海域环境的监测需求。

Based on Landsat5 and landsat8 data,we extracted the information of coastline and sea region temperature field around Tianwan nuclear power plant,and analyzed the distribution characteristics of sea region temperature field near Tianwan nuclear power plant.The results showed that from 2008 to 2020,the construction projects surrounding Tianwan nuclear power plant increased significantly,and the peripheral sea region environment changed significantly.Before the operation of nuclear power plant,the temperature in the nearby sea region was relatively uniform,and there was no obvious temperature difference and temperature rising.After the operation of nuclear power plant,there appeared obvious water temperature of sea region surrounding Tianwan nuclear power plant.The water intake channel construction of nuclear power plant can protect the safety of cooling water intake,but it is not conducive to the diffusion of thermal discharge.After the expansion of nuclear power plant,the heat affected area increased further,that temperature rise above 1℃increased by about 12.11%,and the temperature rise above 4℃increased by about 6.98%.Remote sensing technology can effectively monitor the environmental changes and meet the needs of environmental monitoring in the sea region near the nuclear power plant.