Journal ArticleDOI
A terrain-following grid transform and preconditioner for parallel, large-scale, integrated hydrologic modeling
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TLDR
Cases where the analytical Jacobian is used for the Newton iteration and as a non-symmetric preconditioner for the linear system are shown to have faster computation times and better scaling, demonstrating the importance of solver efficiency in parallel scaling through the use of an appropriate preconditionser.About:
This article is published in Advances in Water Resources.The article was published on 2013-03-01. It has received 200 citations till now. The article focuses on the topics: Preconditioner & Newton's method.read more
Citations
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Modeling Soil Processes: Review, Key Challenges, and New Perspectives
Harry Vereecken,Andrea Schnepf,Jan W. Hopmans,Mathieu Javaux,Dani Or,Tiina Roose,Jan Vanderborght,Michael H. Young,Wulf Amelung,Matt Aitkenhead,Steven D. Allison,Shmuel Assouline,Philippe C. Baveye,Markus Berli,Nicolas Brüggemann,Peter Finke,Markus Flury,Thomas Gaiser,Gerard Govers,Teamrat A. Ghezzehei,Paul D. Hallett,Harrie-Jan Hendricks Franssen,J. Heppell,Rainer Horn,Johan Alexander Huisman,Diederik Jacques,François Jonard,Stefan Kollet,François Lafolie,Krzysztof Lamorski,Daniel Leitner,Alex B. McBratney,Budiman Minasny,Carsten Montzka,Wolfgang Nowak,Ya. A. Pachepsky,José Padarian,Nunzio Romano,Kurt Roth,Youri Rothfuss,Edwin C. Rowe,Andreas Schwen,Jirka Šimůnek,Aaldrik Tiktak,J.C. van Dam,S.E.A.T.M. van der Zee,Hans-Jörg Vogel,Jasper A. Vrugt,Thomas Wöhling,Iain M. Young +49 more
TL;DR: Key challenges in modeling soil processes are identified, including the systematic incorporation of heterogeneity and uncertainty, the integration of data and models, and strategies for effective integration of knowledge on physical, chemical, and biological soil processes.
Journal ArticleDOI
Connections between groundwater flow and transpiration partitioning
Reed M. Maxwell,Laura E. Condon +1 more
TL;DR: In this paper, the authors used integrated hydrologic simulations that couple vegetation and land-energy processes with surface and subsurface hydrology to study transpiration partitioning at the continental scale.
Journal ArticleDOI
Global hydrology 2015: State, trends, and directions
TL;DR: A review of the current state of global hydrological modeling can be found in this article, which discusses past and recent developments, and extrapolates these to future challenges and directions.
Journal ArticleDOI
Hyper-resolution global hydrological modelling: what is next?
Marc F. P. Bierkens,Victoria A. Bell,Peter Burek,Nathaniel W. Chaney,Laura E. Condon,Cédric H. David,Cédric H. David,Ad de Roo,Petra Döll,Niels Drost,James S. Famiglietti,James S. Famiglietti,Martina Flörke,David Gochis,Paul R. Houser,Rolf Hut,Jessica Keune,Stefan Kollet,Reed M. Maxwell,John T. Reager,John T. Reager,Luis Samaniego,Edward A. Sudicky,Edwin Sutanudjaja,Nick van de Giesen,Hessel Winsemius,Eric F. Wood +26 more
TL;DR: In this paper, the authors reflect the discussions that were held among the authors during and after the Workshop ‘Hyper-resolution global hydrological modelling: the next======¯¯¯¯¯¯step’ held on 13-14 February 2014 in Utrecht, the======Netherlands.
Journal ArticleDOI
Surface-subsurface model intercomparison: A first set of benchmark results to diagnose integrated hydrology and feedbacks
Reed M. Maxwell,Mario Putti,Steven B. Meyerhoff,Jens-Olaf Delfs,Ian M. Ferguson,Ian M. Ferguson,Valeriy Y. Ivanov,Jongho Kim,Olaf Kolditz,Olaf Kolditz,Stefan Kollet,Mukesh Kumar,S. R. Lopez,Jie Niu,Claudio Paniconi,Young-Jin Park,Mantha S. Phanikumar,Chaopeng Shen,Edward A. Sudicky,Mauro Sulis +19 more
TL;DR: An intercomparison study of seven coupled surface-subsurface models based on a series of benchmark problems shows good agreement for the simpler test cases, while the more complicated test cases bring out some of the differences in physical process representations and numerical solution approaches between the models.
References
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Journal ArticleDOI
A closed-form equation for predicting the hydraulic conductivity of unsaturated soils
van Genuchten,M. Th. +1 more
TL;DR: Van Genuchten et al. as mentioned in this paper proposed a closed-form analytical expression for predicting the hydraulic conductivity of unsaturated soils based on the Mualem theory, which can be used to predict the unsaturated hydraulic flow and mass transport in unsaturated zone.
Journal ArticleDOI
Capillary conduction of liquids through porous mediums
TL;DR: In this article, the authors used Darcey's law to derive the equation K∇2ψ+∇K·∇ψ +g∂K/∂z=−ρsA∆ψ/∆t for the capillary conduction of liquids in porous mediums.
Journal ArticleDOI
Jacobian-free Newton-Krylov methods: a survey of approaches and applications
Dana A. Knoll,David E. Keyes +1 more
TL;DR: The aim of this paper is to present the reader with a perspective on how JFNK may be applicable to applications of interest and to provide sources of further practical information.
Journal ArticleDOI
Hybrid Krylov methods for nonlinear systems of equations
Peter Brown,Youcef Saad +1 more
TL;DR: To improve the global convergence properties of these basic algorithms, hybrid methods based on Powell's dogleg strategy are proposed, as well as linesearch backtracking procedures.
Journal ArticleDOI
Integrated surface-groundwater flow modeling: A free-surface overland flow boundary condition in a parallel groundwater flow model
Stefan Kollet,Reed M. Maxwell +1 more
TL;DR: Ashby et al. as discussed by the authors proposed a more general coupled model that incorporates a new two-dimensional overland flow simulator into the parallel three-dimensional variably saturated subsurface flow code ParFlow.
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Integrated surface-groundwater flow modeling: A free-surface overland flow boundary condition in a parallel groundwater flow model
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