Also, the first 10 PCs among 974 modes computed by the reduced order model conserved approximately over 93% of the system variance.
Findings indicated that MIKE21's results closely matched the experimental data collected by field study. Then, the dominant modes of salinity were determined by PCA technique while MIKE21 simulated results were compared with the output of developed reduced order model. At first, spatial variation of salinity in the lake was simulated by MIKE21 to prepare the input information for the PCA. This article aims to propose a new approach of salinity modeling using a reduced-order model based on MIKE21 simulation model, in conjunction with principal component analysis (PCA) technique. During the last three decades, several considerable man-made changes including river damming and construction of a causeway across the lake affected the lake salinity. Urmia Lake in the northwestern of Iran is a hypersaline water body and has become an environmentally important issue especially due to the presence of an infrequent aquatic species, Artemia Urmiana.
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