Model reduction of stochastic groundwater flow and transport processes
This work presents a comprehensive methodology for the reduction of analytical or numerical stochastic models characterized by uncertain input parameters or boundary conditions. The technique, based on the Polynomial Chaos Expansion (PCE) theory, represents a versatile solution to solve direct or in...
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Alma Mater Studiorum - Università di Bologna
2013
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ndltd-unibo.it-oai-amsdottorato.cib.unibo.it-59372014-03-24T16:30:51Z Model reduction of stochastic groundwater flow and transport processes Ciriello, Valentina <1983> ICAR/01 Idraulica This work presents a comprehensive methodology for the reduction of analytical or numerical stochastic models characterized by uncertain input parameters or boundary conditions. The technique, based on the Polynomial Chaos Expansion (PCE) theory, represents a versatile solution to solve direct or inverse problems related to propagation of uncertainty. The potentiality of the methodology is assessed investigating different applicative contexts related to groundwater flow and transport scenarios, such as global sensitivity analysis, risk analysis and model calibration. This is achieved by implementing a numerical code, developed in the MATLAB environment, presented here in its main features and tested with literature examples. The procedure has been conceived under flexibility and efficiency criteria in order to ensure its adaptability to different fields of engineering; it has been applied to different case studies related to flow and transport in porous media. Each application is associated with innovative elements such as (i) new analytical formulations describing motion and displacement of non-Newtonian fluids in porous media, (ii) application of global sensitivity analysis to a high-complexity numerical model inspired by a real case of risk of radionuclide migration in the subsurface environment, and (iii) development of a novel sensitivity-based strategy for parameter calibration and experiment design in laboratory scale tracer transport. Alma Mater Studiorum - Università di Bologna Di Federico, Vittorio 2013-05-31 Doctoral Thesis PeerReviewed application/pdf en http://amsdottorato.unibo.it/5937/ info:eu-repo/semantics/openAccess |
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ICAR/01 Idraulica Ciriello, Valentina <1983> Model reduction of stochastic groundwater flow and transport processes |
description |
This work presents a comprehensive methodology for the reduction of analytical or numerical stochastic models characterized by uncertain input parameters or boundary conditions. The technique, based on the Polynomial Chaos Expansion (PCE) theory, represents a versatile solution to solve direct or inverse problems related to propagation of uncertainty. The potentiality of the methodology is assessed investigating different applicative contexts related to groundwater flow and transport scenarios, such as global sensitivity analysis, risk analysis and model calibration. This is achieved by implementing a numerical code, developed in the MATLAB environment, presented here in its main features and tested with literature examples. The procedure has been conceived under flexibility and efficiency criteria in order to ensure its adaptability to different fields of engineering; it has been applied to different case studies related to flow and transport in porous media. Each application is associated with innovative elements such as (i) new analytical formulations describing motion and displacement of non-Newtonian fluids in porous media, (ii) application of global sensitivity analysis to a high-complexity numerical model inspired by a real case of risk of radionuclide migration in the subsurface environment, and (iii) development of a novel sensitivity-based strategy for parameter calibration and experiment design in laboratory scale tracer transport. |
author2 |
Di Federico, Vittorio |
author_facet |
Di Federico, Vittorio Ciriello, Valentina <1983> |
author |
Ciriello, Valentina <1983> |
author_sort |
Ciriello, Valentina <1983> |
title |
Model reduction of stochastic groundwater flow and transport processes |
title_short |
Model reduction of stochastic groundwater flow and transport processes |
title_full |
Model reduction of stochastic groundwater flow and transport processes |
title_fullStr |
Model reduction of stochastic groundwater flow and transport processes |
title_full_unstemmed |
Model reduction of stochastic groundwater flow and transport processes |
title_sort |
model reduction of stochastic groundwater flow and transport processes |
publisher |
Alma Mater Studiorum - Università di Bologna |
publishDate |
2013 |
url |
http://amsdottorato.unibo.it/5937/ |
work_keys_str_mv |
AT ciriellovalentina1983 modelreductionofstochasticgroundwaterflowandtransportprocesses |
_version_ |
1716654684551249920 |