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- W2470245600 abstract "ABSTRACTSWAT model usually underestimates daily peak discharges. To resolve this problem, in this study, the algorithm related with the surface flow simulation was modified by pa rtitioning 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 5,000 m 3 /s. The modified SWAT was found to be able to more accurately reproduce daily peaks, particularly showing increase rates of 9.9%, 1 8.6% and 12.6%, respectively, for top three peaks that occurred in the years of 1990, 2002, and 2006.Key words : SWAT, Daily peak discharge, Excessive infiltration, Time of concentration초 록본 연구에서는 SWAT 모형으로 일 유출량을 모의할 경우에 수문곡선의 첨두부가 과소하게 산정되는 문제를 개선하기 위해서 지표유출의 집중시간과 토양수의 연직 유하시간의 상대적 길이를 고려하여 초과침투량의 일부를 지표유출량에 추가로 할당하고 지표유출량의 크기에 따라 집중시간이 가변적으로 계산되도록 지표유출해석 알고리즘을 수정하였다 . 개선된 SWAT 모형을 충주댐 상류유역에 적용한 결과 첨두유량이 5,000 m" @default.
- W2470245600 created "2016-07-22" @default.
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- W2470245600 date "2016-06-01" @default.
- W2470245600 modified "2023-09-23" @default.
- W2470245600 title "Modification of Surface Flow Analysis Algorithm in SWAT" @default.
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- W2470245600 doi "https://doi.org/10.12652/ksce.2016.36.3.0417" @default.
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