1. 서 론
![]() | Fig. 1.(a) Map of Pohang New Port with locations of detached breakwater construction outside the port and the two wavebreakers inside the port (Ssangyong Engineering & Construction Co., Ltd., 2016), (b) Schematics of detached breakwater (Ssangyong Engineering & Construction Co., Ltd., 2019). |
2. 자료 수집 및 분석
2.1 도제 건설
2.2 현장관측
Table 1.
2.3 선행 수치실험
![]() | Fig. 3.Comparison of observed wave conditions with numerical model results for a period before the detached breakwater construction (Jul. 4∼9, 2018). (a) wave height measured at St. W0 with modeled height (red line), (b) wave period and direction measured at St. W0, (c) wave height measured at St. W1 with modeled height (dashed line), (d) wave height measured at St. W2 with modeled height (dashed line), (e) wave height measured at St. W3 with modeled height (dashed line), (f) wave height measured at St. W4 with modeled height (dashed line). |
![]() | Fig. 4.Same as Fig. 3 but for a period after the detached breakwater construction (Feb. 16∼20, 2020). |
3. 관측 결과
3.1 시계열 비교
![]() | Fig. 5.(a) Time series of observed wave height (Hm0) during a period before construction of the detached breakwater (Oct. 10∼25, 2017). Left panel (dark blue line): measurements at St. W0. Right panel (green, yellow, light blue and orange lines): measurements at Sts. W1∼W4 respectively, (b) time series of wave period (Tp) and direction (Dirmn) measurements, (c) ratio of wave heights (light blue: H_W1/H_W0, yellow: H_W2/H_W0, green: H_W3/W0, orange: H_W4/H_W0). |
![]() | Fig. 6.Same with Fig. 5 but for another period before the detached breakwater construction (Mar. 5∼10, 2018). |
![]() | Fig. 7.Same with Fig. 5 but for a period after the detached breakwater construction (Sep. 21∼25, 2019). |
![]() | Fig. 8.Same with Fig. 5 but for another period after the detached breakwater construction (Jan. 26∼Feb. 3, 2020). |
3.2 항내 파고 저감율 검토
![]() | Fig. 9.(a) Wave height distribution measured at St. W0 (x-axis) and W1 (y-axis) before the construction of detached breakwater (Jan. 1, 2017∼Feb. 13, 2019) with different incident wave directions (reds: NNE, orange: NE, yellow: ENE). The solid lines are the linear regression results of corresponding colored dots. (b) same with (a) but after the construction of detached breakwater (Aug. 6, 2019∼May 6, 2020). |
![]() | Fig. 10.Same with Fig. 9 but between W0 and W2. |
![]() | Fig. 11.Same with Fig. 9 but between W0 and W3. |
![]() | Fig. 12.Same with Fig. 9 but between W0 and W4. |