四种拉格朗日粒子浓度计算方法的评估——箱式计数法、高斯核、均匀核和抛物线核

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Abstract The efficiency of four concentration calculation methods for Lagrangian particle dispersion model (the Box counting, Gaussian kernel, Uniform kernel and Parabolic kernel) was investigated, by simulating the local-scale dispersion of radionuclides ¹³⁷Cs released from the Fukushima Daiichi nuclear accident. The meteorological diagnostic model CALMET was used to calculate the input wind field for the Lagrangian particle dispersion model LAPMOD. The simulated ¹³⁷Cs concentrations were validated with measured data at the Futaba and Naraha monitoring stations. The four methods successfully reproduce most of the measured peaks at the two stations (average FAC10 of Futaba: 0.57; average FAC10 of Naraha: 0.55) was indicated by the results. The results of the Box counting, Uniform kernel and Parabolic kernel were closer to the observed peaks and generally met the statistical acceptance criteria, but the results of the Gaussian kernel were significantly underestimated. The concentration distribution results indicated that the Box counting, Uniform kernel, and Parabolic kernel follow the same numerical trend. In addition, the plumes of the Uniform kernel and Parabolic kernel spread more widely, while the concentration results of Gaussian kernel decayed rapidly in the downwind direction.

Key words： Fukushima nuclear accident radionuclide atmospheric dispersion particle concentration calculation method CALMET LAPMOD

Received: 10 November 2022

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X591

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	Articles by authors
	YANG Li
	WANG Cun-you
	CHEN Yi-xue
	ZHUANG Shu-han
	LI Xin-peng
	FANG Sheng

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YANG Li,WANG Cun-you,CHEN Yi-xue等. Evaluation of four Lagrangian particle concentration calculation methods-Box counting, Gaussian kernel, Uniform kernel and Parabolic kernel[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(7): 3404-3415.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I7/3404

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