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KMID : 1024520170260040433
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Journal of the Environmental Sciences
2017 Volume.26 No. 4 p.433 ~ p.445
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Application of the Load Duration Curve (LDC) to Evaluate the Achievement Rate of Target Water Quality in the Nakdong River Unit Watersheds
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Jung Kang-Young
Kim Hong-Tae
Kim Hong-Tae
Kim Sang-Soo
Kim Shin
Shin Dong-Seok
Kim Gyeong-Hoon
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Abstract
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In recent years, the United States has used the Load Duration Curve (LDC) method to identify water pollution problems, considering the size of the pollutant load in the entire stream flow condition to effectively evaluate Total Maximum Daily Loads (TMDLs). A study on the improvement of the target water quality evaluation method was carried out by comparing evaluations of two consecutive years of water quality and LDC data for 41 unit watersheds (14 main streams and 27 tributaries). As a result, the achievement rate of the target water quality evaluation method, according to current regulations, was 68-93%, and that by the LDC method was 82-93%. Evaluating the target water quality using the LDC method results in a reduction in the administrative burden and the total amount of planning as compared to the current method.
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KEYWORD
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Nakdong-river, LDC, Target water quality, TMDLs
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