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위성추적부이를 이용한 새만금 유출수 이동경로 및 특성에 관한 연구
임은표(Lim Eun-Pyo),이흥재(Lie Heung-Jae),조철호(Cho Cheol-Ho),이석(Lee Seok) 한국항해항만학회 2008 한국항해항만학회 학술대회논문집 Vol.2008 No.공동학술
We analyzed the change of behavior and characteristic of sluice gates outflow water caused by the construction of Saemangeum dike, based on field observation using by TGPS. Saemangeum dike was completed in April 2006. Before closure of dike, the distance of outflow is 12km ~ 14km during one tidal cycle also mean speed is 1.5m/s. After closure of dike, the tidal range in outside of the dike decreased slightly but significantly and the tidal current in outside of the dike decreased about 50 percent. So the distance of outflow and mean speed decreased about 3km and 0.1m/s respectively.
위성추적부이를 이용한 새만금 유출수 이동경로 및 특성에 관한 연구
임은표(Lim Eun-Pyo),이흥재(Lie Heung-Jae),조철호(Cho Cheol-Ho),이석(Lee Seok) 한국마린엔지니어링학회 2008 한국마린엔지니어링학회 학술대회 논문집 Vol.2008 No.-
We analyzed the change of behavior and characteristic of sluice gates outflow water caused by the construction of Saemangeum dike, based on field observation using by TGPS. Saemangeum dike was completed in April 2006. Before closure of dike, the distance of outflow is 12㎞ ~ 14㎞ during one tidal cycle also mean speed is 1.5㎧. After closure of dike, the tidal range in outside of the dike decreased slightly but significantly and the tidal current in outside of the dike decreased about 50 percent. So the distance of outflow and mean speed decreased about 3㎞ and 0.1㎧s respectively.
서남해 해상풍력실증단지에서 X-Band Radar로 관측한 유동 및 파랑 자료 검증
최승삼,임은표,이형래,문광석,전인성,김민석 한국풍력에너지학회 2024 풍력에너지저널 Vol.15 No.1
In order to respond to environmental changes and various events in the nearby sea area due to the operation of an offshore wind substantiation farm in the Southwest Sea, X-band radar has been installed and operated on a fixed platform since 2018. The X-band radar's monitoring system produces wave and current data through Rutter's Ocean WaveS wave and current (Sigma S6 WaMoS II). In this study, to verify the reliability of the produced data, the accuracy of current and wave data was evaluated by analyzing the correlation with the results obtained by an acoustic doppler current profiler (ADCP). The selected analysis period was a total of 30 days from November 29 to December 28, 2021, the period during which the ADCP survey was conducted. As a result of comparative verification, the current, wave height and peak wave period (Hs > 0.69 m) data observed from the X-band radar showed a high correlation with the results investigated from ADCP. In the future, current and wave data produced by X-band radar are expected to be used as basic data to analyze environmental changes in sea areas and provide information on various events.
용수빈,임은표,김행운,곽문성,김인수,전인성,김민석 한국풍력에너지학회 2024 풍력에너지저널 Vol.15 No.1
In order to understand water depth distribution in the waters of the southwestern sea offshore wind power demonstration complex, field observations were conducted using a multi-beam echosounder from before construction (2018.2) to operation (2022.8). After data processing and correction of the observed depth, cross-sectional analysis was performed to calculate the maximum water depth value, and time phase analysis was performed using the maximum water depth value. The maximum water depth change rate over time tended to gradually decrease, and there was little difference in the rate of change before the construction of the wind turbine foundation structure, and the rate of change was rapid when the foundation structure was under construction. As a result of time phase analysis, the rate of change of the first (2018.02) and the second (2018.05) showed a rate between -6.27 and -4.13, on average, as the rate of change before the construction of the offshore wind farm, and there was no difference between the first and second rates. The third (2018.11) rate of change was -4.25 to -1.82, and the fourth (2019.04) rate of change was -2.34 to -1.22, and the rate of change increased rapidly after the third time. The fifth (2019.07) rate of change was -2.11 to -1.31, the sixth (2021.05) rate of change was -2.09 to -1.28, and the seventh (2022.08) was -2.11 to –1.22 rate of change, and after the rate of change reached some extent, the change was analyzed in an insufficient graph.
Characteristics of Semi-diurnal and Diurnal Currents at a KOGA Station over the East China Sea Shelf
노수연,승영호,임은표,유학열 한국해양과학기술원 2014 Ocean and Polar Research Vol.36 No.1
The long-term mooring performed at a KOGA station, located at about 30o20'N, 126o12'E in the East China Sea shelf, shows some different behaviors between “semi-diurnal” and “diurnal currents” defined as the currents with periods around, respectively, a half day and a day. They appear to be predominantly tidal having significant coherences with sea level changes around the semi-diurnal and diurnal frequencies. The “semi-diurnal current” is strongly barotropic all year round. However, contrastingly, it is largely baroclinic in summer in the area about 70 km nearer to the continental slope, referred to as the “slope-area”, as was found in previous current observations. The “diurnal current” of tidal origin is strongly barotropic in winter. In spring and summer, however, it becomes more baroclinic although it still remains largely barotropic, also showing more of its barotropic nature than in the “slope-area”. The inertial oscillation contributing to the “diurnal current” appears to be more prominent when the current is baroclinic, indicating the important role played by stratification in generation of inertial oscillations. Downward energy propagation of inertial oscillation is not observed, suggesting that it is not created at the surface by wind. Considering that the study area is both near a critical latitude and proximity to the continental slope, it is suggested that parametric subharmonic instability (PSI) plays a significant role in creating the baroclinic inertial oscillation.