CAJ | 학술논문

研究了波致底切应力和二维辐射应力对悬沙的作用。首先对东山湾的水动力进行了数值模拟并与实测资料进行了对比检验，然后对东山湾悬浮泥沙进行了考虑波浪和不考虑波浪两种情况下的数值模拟并与实测资料进行了相关对比分析。在模式建立过程中，依据东山湾独特的窄口型半封闭河口海湾的特点，基于ECOMSED模式（2002）建立了东山湾三维水动力模型，并通过第三代海浪模式MASNUM加入了波浪对底切应力及辐射应力的影响，通过ECOMSED中的底边界层模型考虑了波浪增强底摩擦的作用，综合分析了东山湾的水动力及泥沙状况。结果表明在东山湾数值模拟中，该模式能较好地模拟这类海域的水动力及泥沙输运状况。在东山湾模拟计算中，潮流的作用强于波浪的作用，但考虑波浪因素后，泥沙模拟结果更好。在波浪的作用中，底切应力相比于二维辐射应力占有绝对的优势，两者相差2个量级以上，因此可以不考虑二维辐射应力的影响。
연구료파치저절응력화이유복사응력대현사적작용。수선대동산만적수동력진행료수치모의병여실측자료진행료대비검험，연후대동산만현부니사진행료고필파랑화불고필파랑량충정황하적수치모의병여실측자료진행료상관대비분석。재모식건립과정중，의거동산만독특적착구형반봉폐하구해만적특점，기우ECOMSED모식（2002）건립료동산만삼유수동력모형，병통과제삼대해랑모식MASNUM가입료파랑대저절응력급복사응력적영향，통과ECOMSED중적저변계층모형고필료파랑증강저마찰적작용，종합분석료동산만적수동력급니사상황。결과표명재동산만수치모의중，해모식능교호지모의저류해역적수동력급니사수운상황。재동산만모의계산중，조류적작용강우파랑적작용，단고필파랑인소후，니사모의결과경호。재파랑적작용중，저절응력상비우이유복사응력점유절대적우세，량자상차2개량급이상，인차가이불고필이유복사응력적영향。
We studied the effects of wave induced bottom shear stress and two-dimensional radiation stress on the suspended sediment concentration (SSC).At first,we made the comparison of the hydrodynamic simulation and observation of Dongshan Bay.Then we simulated SSC in cases of considering and no considering waves,respective-ly.We also compared and studied the results with the observed and the simulated.In our three-dimensional hydro-dynamic model of ECOMSED(2002)of the Dongshan Bay,we considered not only the characters of the Bay,such as its narrow mouth,semi-closed shape and river inflow,but also the wave factors of wave induced bottom shear stress and two-dimensional radiation stress,which were calculated by MASNUM Wave Model of the 3 rd generation wave model.We considered the enhanced bottom friction using the bottom boundary model of ECOMSED and ana-lyzed the hydrodynamic and SSC characteristics of the Dongshan Bay.The results indicated that this model could well simulate the hydrodynamic and SSC conditions in such kind of bays.From our simulations,the effect of cur-rents is greater than waves,but the results are greatly improved when considering waves.When comparing the effects of wave induced bottom shear stress and two-dimensional radiation stress,we can find that the wave induced bottom shear stress predominates the radiation stress.The former one is more than 2 orders magnitude higher than the later and so we can ignore the later in the simulations.