표제지
국문요약
영문요약
목차
제1장 서론 15
제2장 연구 지역 18
제3장 연구 방법 20
3.1. 관측 자료 수집 20
3.1.1. 현장 관측 20
3.1.2. 유량 및 염분 자료 수집 21
3.2. 수치모델 구축 24
3.2.1. 모델 개요 24
3.2.2. 격자 구성 25
3.2.3. 초기 조건 및 경계 조건 27
제4장 모델 검증 28
4.1. 조위 29
4.2. 유속 31
4.3. 염분 32
제5장 연구 결과 37
5.1. 체적 및 염 수송량 40
5.2. 단면을 통한 염 수송의 특성 45
5.2.1. A1 지역에서의 염 수송 45
5.2.2. A2 지역에서의 염 수송 47
5.3. 염 수송의 계절적인 변동성 50
제6장 토의 53
6.1. 경기만의 담수 영향범위 54
6.1.1. 유량에 따른 담수 영향범위 55
6.1.2. 유량과 담수 확산 거리의 관계식 58
6.2. 유량에 따른 염 수송 특성 60
6.3. 경기만 한강 하구에서의 물질 이동 특성 62
6.4. 한계점 및 고찰 64
6.4.1. 수온의 영향 64
6.4.2. 바람의 영향 65
제7장 결론 68
References 70
Table 1. Setup details for ADCP and CTD observations 20
Table 2. Statistics for 11 wet seasons R1-R11 suggested by Fig. 2a 23
Table 3. Model validation for tide-level, along-channel velocity, and salinity 29
Table 4. Results for a time-averaged FS for 30 days and its three components QƒS0, FE and FT suggested in Fig. 15[이미지참조] 52
Table 5. 10 numerical model scenarios for QR[이미지참조] 54
Fig. 1. Map of the Gyeonggi Bay and the computational grid for numerical modeling (a), analysis area A1 (b), and A2 (c), and depth variation along Y1-Y2 line (d), showing eight... 19
Fig. 2. Analysis for river discharge and salinity data: (a) daily mean freshwater discharge at Han River over 2011-2020, showing 11 wet seasons R1-R11, (b) monthly mean... 22
Fig. 3. Depth distribution of Gyeonggi Bay (a), analysis area A1 (b) and A2 (c). 26
Fig. 4. Model-data comparison for time series of tide level at ST1, ST3, ST6 and ST8. 30
Fig. 5. Model-data comparison for tidal constituents at ST1-ST8. 31
Fig. 6. Model-data comparison for scatter plot of U and V component at M-YJ. 32
Fig. 7. Comparison of time series data between model and observation data during days 33-78 in 2020 : (a) tide level at Yeongjong-bridge tide station, (b) daily river discharge... 34
Fig. 8. Comparison of time series data between model and observation data during days 234-265 in 2020 : (a) tide level at Yeongjong-bridge tide station, (b) daily river discharge... 35
Fig. 9. Model-data comparison for spatial variation of salinity in W1-W8 at the (a) surface layer and (b) bottom layer. The box plots show the statistical analysis of salinity data over... 36
Fig. 10. Residual volume transport Qƒ and salt transport FS at L1-L6: (a) daily river discharge, (b, c) Qƒ and FS through L1, L2 and L3, (d, e) Qƒ and FS through L4, L5...[이미지참조] 41
Fig. 11. Monthly-averaged Qƒ (Qƒ) and monthly-averaged Fs (Fs) at L1~L6 during (a) dry season and (b) wet season. Positive and negative values indicate the landward (e.g.,...[이미지참조] 43
Fig. 12. Mechanisms of salt transport at L1, L2 and L3: (a) Tide level at Yeongjong-bridge tide station, (b) daily river discharge, (c-e) salt transport FS and its three components...[이미지참조] 46
Fig. 13. Mechanisms of salt transport at L4, L5 and L6 : (a) Tide level at Yeongjong-bridge tide station, (b) daily river discharge, (c-e) salt transport FS and its three components...[이미지참조] 48
Fig. 14. Subtidal estuarine exchange flow uE and salinity SE in L6. Positive and negative values in (a) and (b) indicate the landward (e.g., Han River) and seaward (e.g.,...[이미지참조] 50
Fig. 15. A time-averaged FS for 30 days and its three components QƒS0, FE and FT at L1-L6 during dry season and wet season. Positive and negative values indicate the...[이미지참조] 51
Fig. 16. Surface salinity distribution in Gyeonggi Bay for results of six numerical simulations (Case numbers C1, C3, C5, C6, C9, and C10). The solid yellow lines represent... 57
Fig. 17. Analysis of relationship between QR and D28: (a) distance of freshwater influence (DOFI) in A-B line for C1-C10, (b) region of freshwater influence (ROFI) in Gyeonggi...[이미지참조] 59
Fig. 18. A 29-day time-averaged FS and its three components QƒS0, FE, and FT according to the change in Han River discharge at L1-L6. Positive and negative values...[이미지참조] 61
Fig. 19. Mechanisms of material circulation that change with the QR in the Han River estuary, Gyeonggi Bay. (a-d) indicate when (QR 〈350), (350 〈QR 〈1,000), (1,000 〈QR 〈... 63
Fig. 20. T-S diagram calculated from salinity and temperature data observed at M-YJ during winter (a) and summer (b) seasons. The contour lines of each figure indicate the бt...[이미지참조] 65
Fig. 21. Comparison and analysis for 2 model result MO and MW. (a) Wind stress calculated from MW case, (b) comparison for along-channel velocity of MO and MW, and (c) difference...[이미지참조] 66