標題: A reduced-order based CE-QUAL-W2 model for simulation of nitrate concentration in dam reservoirs
作者: Noori, Roohollah
Yeh, Hund-Der
Ashrafi, Khosro
Rezazadeh, Najmeh
Bateni, Sayed M.
Karbassi, Abdulreza
Kachoosangi, Fatemeh Torabi
Moazami, Saber
環境工程研究所
Institute of Environmental Engineering
關鍵字: Reduced-order modeling;Karkheh reservoir;Nitrate;CE-QUAL-W2;Proper orthogonal decomposition
公開日期: 1-Nov-2015
摘要: When the number of computational grids increases, water quality simulation complexities arise. Therefore, using a reduced order framework to express the variations of the objective parameter may facilitate the simulation task and also the interpretation of computational results. In this regard, a new reduced-order approach was proposed to link a water quality simulator model (CE-QUAL-W2, W2) with a data reduction technique (proper orthogonal decomposition, POD). The W2 model simulated spatio-temporal variations of nitrate in the Karkheh Reservoir, Iran. Thereafter, the POD model reduced the dimensions of simulated nitrate in the computational grids. The performance of the developed reduced-order model (ROM) results was evaluated through the comparison of the regenerated nitrate data by the model, and the simulated ones by W2. Findings indicated that the first four modes among 1825 computed ones by ROM conserved approximately over 91% of the nitrate variations. It means that the ROM was capable of showing the spatio-temporal variations of nitrate in the reservoir using the first few modes. Finally, confirmation of ROM indicated that the error of order of magnitude was less than 0.001, for nitrate ROM to regenerate nitrate data using 100 basis functions. (C) 2015 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jhydrol.2015.10.022
http://hdl.handle.net/11536/129403
ISSN: 0022-1694
DOI: 10.1016/j.jhydrol.2015.10.022
期刊: JOURNAL OF HYDROLOGY
Volume: 530
起始頁: 645
結束頁: 656
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