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DOI : 10.17640/KSWST.2016.24.2.63 , Vol.24, No.2, 63 ~ 71, 2016
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| Title |
| Hydraulic Characteristics of the Tidal River Dongcheon in Busan City |
| 조영만 Young Man Cho , 류동춘 Dong Choon Ryu , 유평종 Pyeong Jong Yoo , 최민식 Min Sik Choi , 설승수 Seung Su Seol , 김상현 Sang Hyun Kim , 이종진 Jong Jin Lee |
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| Abstract |
| Even though various management practices such as sediment dredging were attempted to improve water quality of Dongcheon located in Busan, the environmental condition of this stream was deteriorated. Therefore, Busan metropolitan city had pumped and diverted sea water to upstream of Dongcheon for several years. This study explored hydraulic characteristics of Dongcheon to configure the best management practice for ecological restoration and water quality improvement of a man made urban stream. Intensive field investigation indicates that average flow velocities at depths of 20% and 80% from the water surface ranged 5 to 10 cm/s and 2 to 5 cm/s, respectively. Concentrations of dissolved oxygen for all depths were less than 0.25 mg/l during low tidal period. Even though density difference can be found along stream depth, density current seems rarely generated in Dongcheon. Short period of high tidal portion and shallow depths are responsible for well mixing nature of Doncheon. |
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| Key Words |
| Density current, Sea water, Velocity, Dongcheon |
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