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environmental-phenomena
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On the use of COMSOL Multiphysics for seawater intrusion in fractured coastal aquifers
, Article 25th Salt Water Intrusion Meeting, SWIM 2018, 17 June 2018 through 22 June 2018 ; Volume 54 , 2018 ; 22671242 (ISSN) ; Fahs, M ; Ataie Ashtiani, B ; Simmons, C. T ; Younes, R ; Sharif University of Technology
EDP Sciences
2018
Abstract
COMSOL Multiphysics is a comprehensive simulation software environment for a wide range of applications. COMSOL has an interactive interface that facilitates the modeling procedure and allows an easy coupling of different physical processes. The Subsurface Flow module extends the COMSOL modeling environment to applications related to fluid flow in saturated and variably saturated porous media. COMSOL is increasingly used in the investigation of geophysical, hydrogeological and environmental phenomena. The main goal of this work is to explore the ability of COMSOL for simulating seawater intrusion (SWI) in fractured coastal aquifers. Numerical modeling of such a problem is of high interest as...
Optimized echo state networks for drought modeling based on satellite data
, Article International Journal of Innovative Computing, Information and Control ; Volume 11, Issue 3 , 2015 , Pages 1021-1031 ; 13494198 (ISSN) ; Mohammadinezhad, A ; Sharif University of Technology
IJICIC Editorial Office
2015
Abstract
Remotely sensed data obtained through satellite imaging is a useful tool for modeling environmental phenomena such as drought. In this manuscript, we apply optimized echo state networks to model and predict drought severity based on satellite images. To this end, a model is constructed in which the satellite-based vegetation index is fed as an input and drought severity index is obtained as output. We use a Kronecker-based approach to reduce the number of parameters of echo state networks to be optimized (i.e., the internal weights of reservoir). A number of evolutionary algorithms are used to optimize the parameters, of Differential Evolution results in the best performance as compared to...