Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024010 |
Assimilation of Satellite Altimetry Data for Effective River Bathymetry | |
Breda, J. P. L. F.1; Paiva, R. C. D.1; Bravo, J. M.1; Passaia, O. A.1; Moreira, D. M.2 | |
2019-09-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:9页码:7441-7463 |
文章类型 | Article |
语种 | 英语 |
国家 | Brazil |
英文摘要 | One of the main problems of hydrologic/hydrodynamic routing models is defining the right set of parameters, especially on inaccessible and/or large basins. Remote sensing techniques provide measurements of the basin topography, drainage system, and channel width; however current methods for estimating riverbed elevation are not as accurate. This paper presents methods of altimetry data assimilation (DA) for estimating effective bathymetry of a hydrodynamic model. We tested past altimetry observations from satellites ENVISAT, ICESAT, and JASON 2 and synthetic altimetry data from satellites ICESAT 2, JASON 3, SARAL, and Surface Water and Ocean Topography to assess future/present mission's potential. The DA methods used were direct insertion, linear interpolation, the Shuffled Complex Evolution-University of Arizona optimization algorithm, and an adapted Kalman filter developed with hydraulically based variance and covariance introduced in this paper. The past satellite altimetry DA was evaluated comparing simulated and observed water surface elevation while the synthetic altimetry DA were assessed through a direct comparison with a true bathymetry. The Shuffled Complex Evolution-University of Arizona and hydraulically based Kalman filter methods presented the best performances, reducing water surface elevation error in 65% in past altimetry data experiment and reducing biased bathymetry error in 75% in the synthetic experiment; however, the latter method is much less computationally expensive. Regarding satellites, it was observed that the performance is related to the satellite intertrack distance, as higher number of observation sites allows more accurate bed elevation estimation. |
英文关键词 | Kalman filter satellite altimetry hydrodynamic model effective bathymetry water surface elevation data assimilation |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000492139200001 |
WOS关键词 | GLOBAL OPTIMIZATION ; KALMAN FILTER ; WATER LEVELS ; RADAR ; DISCHARGE ; MISSION ; OCEAN ; ICE ; ELEVATION ; ACCURACY |
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/186905 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Fed Rio Grande do Sul, Inst Pesquisas Hidraul, Porto Alegre, RS, Brazil; 2.Compannia Pesquisa Recurses Minerals, Rio De Janeiro, Brazil |
推荐引用方式 GB/T 7714 | Breda, J. P. L. F.,Paiva, R. C. D.,Bravo, J. M.,et al. Assimilation of Satellite Altimetry Data for Effective River Bathymetry[J]. WATER RESOURCES RESEARCH,2019,55(9):7441-7463. |
APA | Breda, J. P. L. F.,Paiva, R. C. D.,Bravo, J. M.,Passaia, O. A.,&Moreira, D. M..(2019).Assimilation of Satellite Altimetry Data for Effective River Bathymetry.WATER RESOURCES RESEARCH,55(9),7441-7463. |
MLA | Breda, J. P. L. F.,et al."Assimilation of Satellite Altimetry Data for Effective River Bathymetry".WATER RESOURCES RESEARCH 55.9(2019):7441-7463. |
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