Analytic modeling of two-dimensional transient atmospheric pollutant dispersion by double GITT and Laplace Transform techniques

被引：19

作者：

Cassol, Mariana ^{[1
]}

Wortmann, Sergio ^{[2
]}

Rizza, Umberto ^{[1
]}

机构：

[1] CNR ISAC, Inst Atmospher Sci & Climate, I-73100 Lecce, Italy

[2] Univ Fed Rio Grande do Sul, Escola Tecn, BR-90035007 Porto Alegre, RS, Brazil

来源：

ENVIRONMENTAL MODELLING & SOFTWARE | 2009年 / 24卷 / 01期

关键词：

double GITT; analytical solution; Laplace transform; atmospheric dispersion; advection-diffusion equation; LAYER; DIFFUSION; PBL;

D O I：

10.1016/j.envsoft.2008.06.001

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

An analytical solution for the transient two-dimensional atmospheric pollutant dispersion problem is presented. The approach used in this problem utilizes the double GITT (Generalized Integral Transform Technique), the Laplace Transform and the matrix diagonalization. Furthermore, mathematical filters are used due to the existence of non-homogeneous boundary conditions. The results we obtained are compared with experimental data for short range downwind dispersion utilizing two well-known experimental dispersion datasets (Copenhagen and Prairie Grass). It is shown that the present analytical approach give good results for downwind concentration except for receptors very close to the release points were any Euierian approach based on K-closure is known to fail. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：144 / 151

页数：8

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