Temporal and spatial characteristics of thermal discharge in Tianwan Nuclear Power Plant based on remote sensing data

XING Mengling; WANG Difeng; HE Xianqiang; BAI Yan; CHENG Yinhe

doi:10.3969/j.issn.1001-909X.2020.04.008

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Journal of Marine Sciences ›› 2020, Vol. 38 ›› Issue (4) : 72-79. DOI: 10.3969/j.issn.1001-909X.2020.04.008

Temporal and spatial characteristics of thermal discharge in Tianwan Nuclear Power Plant based on remote sensing data

XING Mengling^1,2,3, WANG Difeng^*2,3, HE Xianqiang^2,3, BAI Yan^2,3, CHENG Yinhe¹

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Abstract

Based on 2007-2018 Landsat series of multi-source remote sensing satellite data, the spatial-temporal characteristics and affecting analysis were carried. The radiative transfer equation algorithm and split-window algorithm were used to retrieve sea surface temperature. After verifying the algorithm through Landsat-MODIS comparison, it shows that the inversed results have a significant linear correlation with the MODIS SST products. Based on the temperature retrieve results of the study area, the characteristics of the seasonal, annual and tidal variation were analyzed. In the aspect of seasonal distribution, the range of spring thermal discharge which is the largest in four seasons is 7 times of autumn one. In the aspect of interannual distribution, with the expansion of installed capacity, the range of thermal discharge continues to expand, reaching to the peak in 2018. In terms of the influence of tides on thermal discharge, the thermal discharge at the moment of high water slack is larger than that of the low water slack. West wind is beneficial to the diffusion of thermal discharge, but its impact on thermal discharge is limited.

Key words

thermal discharge / long time series / spatial-temporal characteristics / Landsat

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XING Mengling, WANG Difeng, HE Xianqiang, BAI Yan, CHENG Yinhe. Temporal and spatial characteristics of thermal discharge in Tianwan Nuclear Power Plant based on remote sensing data[J]. Journal of Marine Sciences. 2020, 38(4): 72-79 https://doi.org/10.3969/j.issn.1001-909X.2020.04.008

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