CAJ | 학술논문

采用二维ECOMSED模型对径流来水来沙变化前后的1978年和1999年伶仃洋洪水期水动力场和悬沙场进行模拟,结果表明:伶仃洋水动力场整体增强,但不同地貌单元水动力变化具有明显差异.分流比变化后洪水期伶仃洋西槽、东槽和中滩水动力增强,涨潮和落潮流速普遍增大0.1m/s;西部各口门区和西滩涨潮流势减弱,径流优势更加明显,但西滩三个口门水道及滩面潮沟落潮流速增大约0.1m/s;东滩水动力特征变化不大.悬沙浓度亦整体升高,平均增加了0.02～0.05kg/m~3,悬沙高值区范围扩大,0.10kg/m~3等值线由西槽西侧明显向东推进到沿东槽南北向分布,径流来沙的影响范围东扩.
채용이유ECOMSED모형대경류래수래사변화전후적1978년화1999년령정양홍수기수동력장화현사장진행모의,결과표명:령정양수동력장정체증강,단불동지모단원수동력변화구유명현차이.분류비변화후홍수기령정양서조、동조화중탄수동력증강,창조화락조류속보편증대0.1m/s;서부각구문구화서탄창조류세감약,경류우세경가명현,단서탄삼개구문수도급탄면조구락조류속증대약0.1m/s;동탄수동력특정변화불대.현사농도역정체승고,평균증가료0.02～0.05kg/m~3,현사고치구범위확대,0.10kg/m~3등치선유서조서측명현향동추진도연동조남북향분포,경류래사적영향범위동확.
A 2-dimensional model is used to simulate the hydrodynamic and sediment fields of the Lingdingyang estuary(LDYE) in flood seasons of 1978 and 1999. The results show the hydrodynamics and suspended sediment dynamics have been largely altered. The hydrodynamics of the LDYE is strengthened in flood seasons, with the alterations varying in different areas. The flood and ebb tidal velocities increase by 0.10 m/s in the west and east channels and the middle shoal. As a whole, the sediment concentration of the LDYE increases by 0.02-0.05 kg/m~3 .The high concentration area is enlarged, and the isocline of 0.10 kg/m~3 extends from the west channel to the east channel, indicating that the influence of fluvial sediment has enhanced markedly.