Low-rank Kalman filtering for efficient state estimation of subsurface advective contaminant transport models
Type
ArticleKAUST Department
Applied Mathematics and Computational Science ProgramComputational Transport Phenomena Lab
Earth Fluid Modeling and Prediction Group
Earth Science and Engineering Program
Environmental Science and Engineering Program
Physical Science and Engineering (PSE) Division
Date
2012-04Permanent link to this record
http://hdl.handle.net/10754/562146
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Accurate knowledge of the movement of contaminants in porous media is essential to track their trajectory and later extract them from the aquifer. A two-dimensional flow model is implemented and then applied on a linear contaminant transport model in the same porous medium. Because of different sources of uncertainties, this coupled model might not be able to accurately track the contaminant state. Incorporating observations through the process of data assimilation can guide the model toward the true trajectory of the system. The Kalman filter (KF), or its nonlinear invariants, can be used to tackle this problem. To overcome the prohibitive computational cost of the KF, the singular evolutive Kalman filter (SEKF) and the singular fixed Kalman filter (SFKF) are used, which are variants of the KF operating with low-rank covariance matrices. Experimental results suggest that under perfect and imperfect model setups, the low-rank filters can provide estimates as accurate as the full KF but at much lower computational effort. Low-rank filters are demonstrated to significantly reduce the computational effort of the KF to almost 3%. © 2012 American Society of Civil Engineers.Citation
El Gharamti, M., Hoteit, I., & Sun, S. (2012). Low-Rank Kalman Filtering for Efficient State Estimation of Subsurface Advective Contaminant Transport Models. Journal of Environmental Engineering, 138(4), 446–457. doi:10.1061/(asce)ee.1943-7870.0000484Sponsors
This publication utilized work supported in part by funds from the KAUST GCR Collaborative Fellow program.ae974a485f413a2113503eed53cd6c53
10.1061/(ASCE)EE.1943-7870.0000484
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