CAJ | 학술논문

利用多波束测深系统对长江口南港、北槽、横沙通道和北港水下地貌进行测量，对沙波波高、波长、迎流倾角、背流倾角、水深和沉积物特征进行统计，并根据流速、沉积物粒径及水深估算其潮周期内净位移。结果表明：长江口沙波基本都为大型沙波，且沙波大小与其所在区域沉积物粒径呈正比关系；长江口各个区域沙波的对称性不同，涨、落潮优势流越明显，则沙波对称性越差，净位移越大；沙波对称性能反映此区域水动力强弱及潮周期内沙波净位移大小。
이용다파속측심계통대장강구남항、북조、횡사통도화북항수하지모진행측량，대사파파고、파장、영류경각、배류경각、수심화침적물특정진행통계，병근거류속、침적물립경급수심고산기조주기내정위이。결과표명：장강구사파기본도위대형사파，차사파대소여기소재구역침적물립경정정비관계；장강구각개구역사파적대칭성불동，창、락조우세류월명현，칙사파대칭성월차，정위이월대；사파대칭성능반영차구역수동력강약급조주기내사파정위이대소。
The underwater topography at the South Channel,North Passage,Channel of Hengsha and North Channel of the Yangtze Estuary were surveyed by using multibeam echo-sounding system,wave height,wavelength,inflow angle,the dorsal stream angle and sediment characteristics of sand waves in these areas were calculated statistically, and the net displacement of sand waves in one tidal period was estimated on the basis of data for flow rate,grain si-zes of sediments and water depths.The results showed that the sand waves in the Yangtze Estuary were basically large,and there took on a proportional relationship between wavelengths with sediment particle sizes.The symme-try of sand waves is different among all surveyed area in the Yangtze Estuary.The more obvious the ebb flow is, the worse the symmetry of sand wave and the more net displacement is.The symmetry of sand waves can reflect the power of water and net displacement of sand waves.