Download PDF by G. Gambolati, G. Verri (eds.): Advanced Methods for Groundwater Pollution Control

By G. Gambolati, G. Verri (eds.)

ISBN-10: 3211827145

ISBN-13: 9783211827147

ISBN-10: 3709126967

ISBN-13: 9783709126967

In fresh years the research, keep watch over, renovation, remediation and proper administration of underground assets have obtained a turning out to be consciousness in numerous sectors, together with business, specialist and educational environments. the quantity describes new advancements in either utilized examine and layout expertise to take care of sustainability of an important source (groundwater) that is consistently threatened through illness caused by reliable waste disposal operations, website reutilization, in depth extraction, unintended leakage of spill in operating installations and non-point resource pollutants in agriculture. it truly is directed to managers, execs, and researchers operating in any of the components curious about the keep watch over, prediction, and remediation of soil and groundwater contamination.

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In the present paper a new strategy of solution is implemented. The procedure is shown to coincide with a block Gauss-Seidel iterative method and therefore can be mathematically generalized into a block SOR iterative procedure, in which each aquifer block is solved with the MCG (modified conjugate gradient) method and each aquitard block is solved with the direct Thomas algorithm for a tridiagonal matrix. The iterations can be accelerated with the aid of the optimum block relaxation factor Wopt· The convergence property of the new scheme is analyzed and compared in relation to the geometry and the physical properties of linear and non-linear multiaquifer systems.

30, 1980. 17. Gambolati, G. and A. M. Perdon, The conjugate gradients in flow and land subsidence modeling. In: Bear, J. and Y. ) Fundamentals of Transport Phenomena in Porous Media. , The Hague, pp 953-984, 1984. 44 G. Gambolati and P. Teatini 18. Varga, R. , Matrix Iterative Analysis. Prentice-Hall, Englewood Cliffs, New Jersey, 1962. 19. , Iterative methods for solving partial differential equations ofthe elliptic type, Trans. Amer. Math. Soc. 76, 92-111, 1954. 20. Rudolph, D. and E. 0. Frind, Hydraulic response ofhighly compressible aquitards during consolidation, Water Resour.

We present a common framework for comparing these two methods, and introduce other approaches that range from simplifications of the Picard scheme to approximations of Newton 's method. These other approaches include explicit discretizations, first and second order accurate linearizations, and quasi-Newton schemes. onvergence of the Picard, Newton, and quasi-Newton methods will also be considered. The effectiveness of these various iterative and noniterative methods will be assessed according to criteria of efficiency and robustness.

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Advanced Methods for Groundwater Pollution Control by G. Gambolati, G. Verri (eds.)

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