Proof of concept of regional scale hydrologic simulations at hydrologic resolution utilizing massively parallel computer resources

Stefan J. Kollet; Reed M. Maxwell; Carol S. Woodward; Steve Smith; Jan Vanderborght; Harry Vereecken; Clemens Simmer

doi:10.1029/2009WR008730

Proof of concept of regional scale hydrologic simulations at hydrologic resolution utilizing massively parallel computer resources

Stefan J. Kollet, Reed M. Maxwell, Carol S. Woodward, Steve Smith, Jan Vanderborght, Harry Vereecken, Clemens Simmer

Research output: Contribution to journal › Article › peer-review

187 Scopus citations

Abstract

We present the results of a unique, parallel scaling study using a 3-D variably saturated flow problem including land surface processes that ranges from a single processor to a maximum number of 16,384 processors. In the applied finite difference framework and for a fixed problem size per processor, this results in a maximum number of approximately 8 × 10⁹ grid cells (unknowns). Detailed timing information shows that the applied simulation platform ParFlow exhibits excellent parallel efficiency. This study demonstrates that regional scale hydrologic simulations on the order of 10³ km² are feasible at hydrologic resolution (∼10 ⁰-10¹ m laterally, 10^-2-10^-1 m vertically) with reasonable computation times, which has been previously assumed to be an intractable computational problem.

Original language	English (US)
Article number	W04201
Journal	Water Resources Research
Volume	46
Issue number	4
DOIs	https://doi.org/10.1029/2009WR008730
State	Published - 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Water Science and Technology

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10.1029/2009WR008730

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abstract = "We present the results of a unique, parallel scaling study using a 3-D variably saturated flow problem including land surface processes that ranges from a single processor to a maximum number of 16,384 processors. In the applied finite difference framework and for a fixed problem size per processor, this results in a maximum number of approximately 8 × 109 grid cells (unknowns). Detailed timing information shows that the applied simulation platform ParFlow exhibits excellent parallel efficiency. This study demonstrates that regional scale hydrologic simulations on the order of 103 km2 are feasible at hydrologic resolution (∼10 0-101 m laterally, 10-2-10-1 m vertically) with reasonable computation times, which has been previously assumed to be an intractable computational problem.",

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AU - Kollet, Stefan J.

AU - Maxwell, Reed M.

AU - Woodward, Carol S.

AU - Smith, Steve

AU - Vanderborght, Jan

AU - Vereecken, Harry

AU - Simmer, Clemens

PY - 2010

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AB - We present the results of a unique, parallel scaling study using a 3-D variably saturated flow problem including land surface processes that ranges from a single processor to a maximum number of 16,384 processors. In the applied finite difference framework and for a fixed problem size per processor, this results in a maximum number of approximately 8 × 109 grid cells (unknowns). Detailed timing information shows that the applied simulation platform ParFlow exhibits excellent parallel efficiency. This study demonstrates that regional scale hydrologic simulations on the order of 103 km2 are feasible at hydrologic resolution (∼10 0-101 m laterally, 10-2-10-1 m vertically) with reasonable computation times, which has been previously assumed to be an intractable computational problem.

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Proof of concept of regional scale hydrologic simulations at hydrologic resolution utilizing massively parallel computer resources

Abstract

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