Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020519 |
Trade-off between cost and accuracy in large-scale surface water dynamic modeling | |
Getirana, Augusto1,2; Peters-Lidard, Christa1; Rodell, Matthew1; Bates, Paul D.3 | |
2017-06-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | Recent efforts have led to the development of the local inertia formulation (INER) for an accurate but still cost-efficient representation of surface water dynamics, compared to the widely used kinematic wave equation (KINE). In this study, both formulations are evaluated over the Amazon basin in terms of computational costs and accuracy in simulating streamflows and water levels through synthetic experiments and comparisons against ground-based observations. Varying time steps are considered as part of the evaluation and INER at 60 s time step is adopted as the reference for synthetic experiments. Five hybrid (HYBR) realizations are performed based on maps representing the spatial distribution of the two formulations that physically represent river reach flow dynamics within the domain. Maps have fractions of KINE varying from 35.6 to 82.8%. KINE runs show clear deterioration along the Amazon river and main tributaries, with maximum RMSE values for streamflow and water level reaching 7827 m(3) s(-1) and 1379 cm near the basin's outlet. However, KINE is at least 25% more efficient than INER with low model sensitivity to longer time steps. A significant improvement is achieved with HYBR, resulting in maximum RMSE values of 3.9-292 m(3) s(-1) for streamflows and 1.1-28.5 cm for water levels, and cost reduction of 6-16%, depending on the map used. Optimal results using HYBR are obtained when the local inertia formulation is used in about one third of the Amazon basin, reducing computational costs in simulations while preserving accuracy. However, that threshold may vary when applied to different regions, according to their hydrodynamics and geomorphological characteristics. Plain Language Summary Recent efforts have led to the development of the local inertia formulation (INER) for an accurate but still cost-efficient representation of surface water dynamics, compared to the widely used kinematic wave equation (KINE). In this study, both formulations are evaluated over the Amazon basin in terms of computational costs and accuracy in simulating streamflows and water levels through synthetic experiments and comparisons against ground-based observations. Varying time steps are considered as part of the evaluation and INER with a 60-second time step (dt) is adopted as the reference for synthetic experiments. Five hybrid (HYBR) realizations are performed based on maps representing the spatial distribution of the two formulations that minimally represent river reach flow dynamics within the domain. Overall conclusions are: (1) a cost-accuracy tradeoff is observed when choosing between KINE and INER; but (2) hybrid models are a viable alternative that can reduce computational costs in continental and global scale simulations while preserving accuracy, in particular, in representing backwater effects. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000405997000026 |
WOS关键词 | AMAZON BASIN ; RIVER FLOW ; DATA ASSIMILATION ; ROUTING SCHEME ; CLIMATE MODELS ; RESOLUTION ; SIMULATION ; PARAMETERS ; IMPACTS ; BALANCE |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21869 |
专题 | 资源环境科学 |
作者单位 | 1.NASA, Goddard Space Flight Ctr, Hydrol Sci Lab, Greenbelt, MD 20771 USA; 2.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA; 3.Univ Bristol, Sch Geog Sci, Bristol, Avon, England |
推荐引用方式 GB/T 7714 | Getirana, Augusto,Peters-Lidard, Christa,Rodell, Matthew,et al. Trade-off between cost and accuracy in large-scale surface water dynamic modeling[J]. WATER RESOURCES RESEARCH,2017,53(6). |
APA | Getirana, Augusto,Peters-Lidard, Christa,Rodell, Matthew,&Bates, Paul D..(2017).Trade-off between cost and accuracy in large-scale surface water dynamic modeling.WATER RESOURCES RESEARCH,53(6). |
MLA | Getirana, Augusto,et al."Trade-off between cost and accuracy in large-scale surface water dynamic modeling".WATER RESOURCES RESEARCH 53.6(2017). |
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