CAJ | 학술논문

利用长江口深水航道三期整治工程前后，北槽洪枯季各测点水沙资料初步探讨了北槽洪枯季水沙运动特征。研究结果表明，北槽洪枯季潮周期平均含沙量分布自上而下总体呈“低-高-低”的分布态势，中段含沙量较高。洪季北槽各测点潮周期平均含沙量与潮周期平均流速相关性较差，北槽泥沙输运以平流输移为主。枯季两者相关较好，北槽泥沙运动则以起悬输运为主。北槽悬沙输运主要以欧拉输运为主，洪季北槽悬沙净输运率要明显大于枯季。洪季北槽中段潮泵及垂向环流作用最为明显，枯季，除北槽上段外，潮泵及垂向环流作用较小，水沙输运方向较为相近。造成洪季北槽中段潮泵作用及垂向环流输沙较大的原因是由于北槽中段滩槽泥沙交换频繁，涨潮流经南槽拦门沙及九段沙滩面后，挟带一定高含沙水体进入北槽，进而造成北槽中段潮泵及垂向环流输沙明显。
이용장강구심수항도삼기정치공정전후，북조홍고계각측점수사자료초보탐토료북조홍고계수사운동특정。연구결과표명，북조홍고계조주기평균함사량분포자상이하총체정“저-고-저”적분포태세，중단함사량교고。홍계북조각측점조주기평균함사량여조주기평균류속상관성교차，북조니사수운이평류수이위주。고계량자상관교호，북조니사운동칙이기현수운위주。북조현사수운주요이구랍수운위주，홍계북조현사정수운솔요명현대우고계。홍계북조중단조빙급수향배류작용최위명현，고계，제북조상단외，조빙급수향배류작용교소，수사수운방향교위상근。조성홍계북조중단조빙작용급수향배류수사교대적원인시유우북조중단탄조니사교환빈번，창조류경남조란문사급구단사탄면후，협대일정고함사수체진입북조，진이조성북조중단조빙급수향배류수사명현。
In this paper,the sediment motion at north passage has been analyzed on the basis of the observations of water current and sediment concentration before and after the third phase engineering of the deep waterways in Changjiang Estuary.The result shows that:the distribution of the sediment concentration of north passage in both flood and dry season appears low-high-low pattern from the upper stream to the down stream where the midstream region of north passage has the highest sediment concentration.The correlation of sediment concentration and wa-ter current averaged in a tide cycle is poor in the flood season so that the sediment advection.plays a more impor-tant role in north passage while in the dry season,the correlation is good so that the sediment suspension plays more.The main form of sediment transport in north passage is the lagrangian advection.The net sediment trans-port in the flood season is bigger than the dry season.The tidal pumping effect as well as the vertical-circulation effect are big in the midstream of north passage in the flood season while in the dry season,they are so small that make the water and sediment move nearly in the same direction excluding the upper stream of north passage.The reason that the tidal pumping effect as well as the vertical-circulation effect play an important roles in the mid-stream of north passage is that the sediment exchanging is very frequent in the midstream of north passage where there exist a high concentration of sediment flowed into north passage generated from both the mouth bar of south passage and Jiuduansha tidal shoal in a flood tide.