Modelling of radionuclide migration through the geosphere with radial basis function method and geostatistics
Vrankar, Leopold (Avtor), Turk, Goran (Avtor), Runovc, Franc (Avtor)

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Izvleček
The modelling of radionuclide transport through the geosphere is necessary in the safety assessment of repositories for radioactive waste. A number of key geosphere processes need to be considered when predicting the movement of radionuclides through the geosphere. The most important input data are obtained from field measurements, which are not available for all regions of interest. For example, the hydraulic conductivity, as input parameter, varies from place to place. In such cases geostatistical science offers a variety of spatial estimation procedures. To assess the a long term safety of a radioactive waste disposal system, mathematical models are used to describe the complicated groundwater flow, chemistry and potential radionuclide migration through geological formations. The numerical solution of partial differential equations (PDEs) has usually been obtained by finite difference methods (FDM), finite element methods (FEM), or finite volume methods (FVM). Kansa introduced the concept of solving PDEs using radial basis functions (RBFs) for hyperbolic, parabolic and elliptic PDEs. The aim of this study was to present a relatively new approach to the modelling of radionuclide migration through the geosphere using radial basis functions methods and to determine the average and sample variance of radionuclide concentration with regard to spatial variability of hydraulic conductivity modelled by a geostatistical approach. We will also explore residual errors and their influence on optimal shape parameters.

Jezik: Angleški jezik Kansa metoda, geostatistika, numerične rešitve, parcijalne diferencijalne enačbe, radionuclide migration, porous media, partial differential equation, radial basic function, numerical solution, Kansa method, geostatistics Delo ni kategorizirano (r6) 1.01 - Izvirni znanstveni članek NTF - Naravoslovnotehniška fakulteta 2004 Taylor & Francis 455-462 f. Vol. 27, No. 4 669 0253-3839 10.1080/02533839.2004.9670895 505183 1043 315 (0 glasov) Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. AddThis uporablja piškotke, za katere potrebujemo vaše privoljenje.Uredi privoljenje...

Naslov: Journal of the Chinese Institute of Engineers Journal of the Chinese Institute of Engineers Zhäongguó gäongchéngshäi xuéhui 0253-3839 25716480

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