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Modification of Surface Flow Analysis Algorithm in SWAT
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 Title & Authors
Modification of Surface Flow Analysis Algorithm in SWAT
Lee, Jeongwoo; Kim, Nam Won; Lee, Jeong Eun;
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 Abstract
SWAT model usually underestimates daily peak discharges. To resolve this problem, in this study, the algorithm related with the surface flow simulation was modified by partitioning excessive infiltration based on the relative length between overland flow time of concentration and percolation travel time in soil water zone and by computing time of concentration varying with the amount of surface flow. The modified SWAT was applied to the Chungju dam watershed to assess the increasing effects of daily peak discharges. The daily peaks simulated by the modified SWAT were on average 10% higher than those by original SWAT for the peaks above . The modified SWAT was found to be able to more accurately reproduce daily peaks, particularly showing increase rates of 9.9%, 18.6% and 12.6%, respectively, for top three peaks that occurred in the years of 1990, 2002, and 2006.
 Keywords
SWAT;Daily peak discharge;Excessive infiltration;Time of concentration;
 Language
Korean
 Cited by
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