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KMID : 1024520130220050591
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Journal of the Environmental Sciences
2013 Volume.22 No. 5 p.591 ~ p.597
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Characteristics of Runoff on Southern Area of Jeju Island, Korea
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Kang Myung-Su
Yang Sung-Kee
Jung Woo-Yul
Kim Dong-Su
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Abstract
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For Kangjeong stream and Akgeun stream in the central part of the southern Jeju Island, on-site discharge estimation was
carried out for approximately 10 months (July 2011-April 2012) twice a month on a regular basis by using ADCP (acoustic
doppler current profiler) and long term rate of discharge was calculated by using SWAT (soil and water assessment tool)
model. The discharge was 0.28-1.30 m3/sec for Kangjeong stream and 0.10-1.54 m3/sec for Akgeun stream. It showed the maximum in the summer and the minimum in the winter. As a result of parameter sensitivity analysis of SWAT model, CN(NRCS runoff curve number for moisture condition Ⅱ), SOL_AWC (available water capacity of the soil layer), and ESCO
(soil evaporation compensation factor) showed sensitive responses. By using the result, the model was corrected and the rate of discharge was calculated. As a result, the annual discharge rate was 27.12-31.86(%) at the Akgeun basin and
23.55-28.43(%) at the Kangjeong basin.
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KEYWORD
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ADCP, SWAT, Sensitivity analysis, Jeju Island
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