CAJ | 학술논문

基于南汇南滩水域2011年12月和2012年6月洪、枯季大潮的现场水文观测资料及2003年2月枯季大潮、2004年9月洪季大潮的历史观测资料，分析潮流历时、流速、优势流和含沙量等水沙现状和变化特征，探讨近年来该水域水沙变化的主要影响因素。结果表明：(1)目前，南汇南滩水域洪季大潮落潮流占主导优势，枯季大潮涨潮流占主导优势；(2)东海大桥及其周边促淤围垦工程后，洪季大潮落潮优势增强，涨潮垂线平均含沙量减少，落潮垂线平均含沙量增多；枯季大潮落潮优势减弱，涨、落潮垂线平均含沙量均减少；(3)近岸工程建设是南汇南滩水域洪季落潮优势增强、枯季落潮优势减弱的主要影响因素；涨、落潮垂线平均含沙量的变化主要与工程建设、流域来沙量减少、近岸沙体变迁等作用有关。可为河口河槽治理提供理论依据。
기우남회남탄수역2011년12월화2012년6월홍、고계대조적현장수문관측자료급2003년2월고계대조、2004년9월홍계대조적역사관측자료，분석조류력시、류속、우세류화함사량등수사현상화변화특정，탐토근년래해수역수사변화적주요영향인소。결과표명：(1)목전，남회남탄수역홍계대조락조류점주도우세，고계대조창조류점주도우세；(2)동해대교급기주변촉어위은공정후，홍계대조락조우세증강，창조수선평균함사량감소，락조수선평균함사량증다；고계대조락조우세감약，창、락조수선평균함사량균감소；(3)근안공정건설시남회남탄수역홍계락조우세증강、고계락조우세감약적주요영향인소；창、락조수선평균함사량적변화주요여공정건설、류역래사량감소、근안사체변천등작용유관。가위하구하조치리제공이론의거。
According to the hydrological data observed at the Nanhui south Shoal of the Changjiang Estuary during the dry season in December, 2011 and flood season in June, 2012, and using the method of tidal range's proportion conversion to assimilate the measured field data of current velocities in 2003 and 2004, this paper analyzed the variations in average fluctuation-tide duration, current velocity, preferential flow and suspended sediment concen-tration (SSC). The influence of typical engineering projects at the Changjiang Estuary such as the East China Sea Bridge and land reclamation on the ebb and flood tidal current and SSC in the Nanhui south Shoal for the last 10 years was discussed. The results showed that (1) around the Nanhui south Shoal the ebb tide dominated during flood season and the flood tide dominated during dry season at spring tide at the present time, which are mainly contrib-uted to intensifying ebb tidal current with decreasing depth-averaged flood SSC during flood season while decreas-ing ebb tidal current and depth-averaged ebb SSC during dry season after the construction of the typical pro-jects; (2) the controlling parameters of the intensive ebb tidal current in flood season and attenuated ebb tidal cur-rent in dry season are those large-scale engineering projects around the Nanhui south Shoal; variations of the depth-averaged flood and ebb SSC may be related to the reduction of basin annual sediment load, large-scale near-shore projects, and sand ridge migration. These results provide a theoretical basis for the estuarine river channel management.