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A tank model application to Soyanggang Dam and Chungju Dam with snow accumulation and snow melt



A tank model application to Soyanggang Dam and Chungju Dam with snow accumulation and snow melt



Han'gug Sujaweon Haghoe Nonmunjib = Journal of Korea Water Resources Association 36(5): 851-861



Snow accumulation and snow melt was simulated and included in the computation of the watershed runoff for Soynaggang Dam and Chungju Dam. A modified Tank Model was used for the simulation, which has three serial tanks and a pulse response function. The model parameters were estimated through the global optimization method of Shuffled Complex Evolution-University of Arizona (SCE-UA). A watershed was divided into four zones of elevation. The temperature decrease of the zones was a rate of -0.6 degrees C/100 m. Almost all precipitation from December to February become accumulated as snow, and then the snow melts and runs off from March to April. The average runoff with snow melt was greater than the average runoff without snow melt during the period from March to April. The improved amount from snow melt simulation was about one fifth of the observed one for Soyanggang Dam. The increased amount for Chungju Dam was about one fourth of the observed average runoff during the same period. Although the watershed runoff was simulated including snow melt, it was less than the observed one for both of the dams.

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Accession: 029816148

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