Proof of concept of regional scale hydrologic simulations at hydrologic resolution utilizing massively parallel computer resources
Proof of concept of regional scale hydrologic simulations at hydrologic resolution utilizing massively parallel computer resources
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DOI：
10.1029/2009wr008730
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发表时间：
2010-04
影响因子：
5.4
通讯作者：
S. Kollet;R. Maxwell;C. Woodward;Steve S. Smith;J. Vanderborght;H. Vereecken;C. Simmer
中科院分区：
文献类型：
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作者：
S. Kollet;R. Maxwell;C. Woodward;Steve S. Smith;J. Vanderborght;H. Vereecken;C. Simmer
我们提出了一个独特的，并行缩放研究的结果，使用3-D饱和流问题，包括土地表面过程，范围从一个单一的处理器，最大数量的16,384处理器。在所应用的有限差分框架中，对于每个处理器的固定问题大小，这导致最大数量约为8 × 109个网格单元（未知数）。详细的时间信息表明，所应用的仿真平台ParFlow具有良好的并行效率。这项研究表明，区域尺度水文模拟的数量级为103平方公里是可行的水文分辨率（100-101米横向，10 - 2-10 - 1米垂直）与合理的计算时间，这一直被认为是一个棘手的计算问题。
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 (∼100–101 m laterally, 10−2–10−1 m vertically) with reasonable computation times, which has been previously assumed to be an intractable computational problem.