CAJ | 학술논문

对2013年在连云港近岸海域采集的170个表层沉积物进行了粒度分析，以得到的粒度参数探讨其沉积物分布特征与物源和水动力环境的关系。结果表明，研究区底质类型主要有泥、砂质泥、粉砂、砂质粉砂与粉砂质砂。总体趋势为近岸细、远岸粗，由岸向海呈现条带状分布。依据海底地形差异及水动力条件结合底质类型可将该地区划为3个区域：Ⅰ海州湾区、Ⅱ航道区、Ⅲ灌河口北侧砂质区。海州湾与航道区的沉积物都属于低能弱流环境下的产物，近岸区域以粉砂为主，远岸以砂质粉砂为主；砂质区沉积物则相对较粗，主要成分为粉砂质砂，受到了较强的波浪掀沙与潮流冲蚀。利用 Gao-Collins 模型对平均粒径、分选系数、偏态系数进行了趋势分析，得到了粒径运移趋势图，揭示了研究区内沉积物输运的趋势，连岛西北部与灌河口北部有较小辐聚区，海州湾北部沉积物运移方向为西南向，表现为向岸运移，与该区域的涨潮流方向一致；徐圩航道中段南部运移趋势较紊乱，是受到了航道疏浚与抛泥的影响。
대2013년재련운항근안해역채집적170개표층침적물진행료립도분석，이득도적립도삼수탐토기침적물분포특정여물원화수동력배경적관계。결과표명，연구구저질류형주요유니、사질니、분사、사질분사여분사질사。총체추세위근안세、원안조，유안향해정현조대상분포。의거해저지형차이급수동력조건결합저질류형가장해지구화위3개구역：Ⅰ해주만구、Ⅱ항도구、Ⅲ관하구북측사질구。해주만여항도구적침적물도속우저능약류배경하적산물，근안구역이분사위주，원안이사질분사위주；사질구침적물칙상대교조，주요성분위분사질사，수도료교강적파랑흔사여조류충식。이용 Gao-Collins 모형대평균립경、분선계수、편태계수진행료추세분석，득도료립경운이추세도，게시료연구구내침적물수운적추세，련도서북부여관하구북부유교소복취구，해주만북부침적물운이방향위서남향，표현위향안운이，여해구역적창조류방향일치；서우항도중단남부운이추세교문란，시수도료항도소준여포니적영향。
A total of 170 surficial sediment samples were collected in the Lianyungang coastal waters in 2013,and the characteristics of grain-size was analyzed for the provenance and hydrodynamics condition.The result shows that the samples can be classified into 5 types as mud,sandy mud,silt,sandy silt and silty sand.The grain size diame-ters decrease landward with decreasing hydrodynamics,showing a banding distribution from the coast to the sea. Based on the submarine topography,hydrodynamics condition and sediment types,the sedimentary environments of Lianyungang coastal waters can be divided into 3 patterns,i.e.I Haizhou Bay,Ⅱ Channel area and Ⅲ Sandy re-gion in the north of Guanhe estuary.Sediments in Haizhou bay and the channel area were formed in the weak cur-rent of sedimentary environment,where inshore area is mainly composed of silt while offshore area consists of sandy silt.However,the sandy region had a stronger tidal current environment and coarser grain size.Used the Gao-Col-lins model,sediment transport trends were mapped and analyzed against the mean size,sorting coefficient and skewness.The trend analysis for the grain size shows that there are 2 convergence zones,one in the northwest of Li-andao and the other in the north of Guanhe estuary.Sediment transport trends to the south west in northern Haizhou bay and it is coincided with the rising tide.The sediment transport trends is quite chaotic in the south of Xuwei channel due to dredging and dumping operations.