CAJ | 학술논문

基于非结构三角形网格的FVCOM (finite-volume coastal ocean model )数值模型,对南海北部海域的潮汐、潮流进行了精细化数值模拟研究,并根据模拟结果详细分析了M2, S2, K1, O1分潮的潮汐和潮流特征。研究结果表明：神泉港到甲子港海域表现为正规全日潮性质,珠江口附近海区潮汐以不正规半日潮为主,其他海域主要表现为不规则全日潮；陆架海域和深水海域主要表现为往复流,陆架坡折区存在较强的旋转流,陆架坡折区为不规则半日潮流和不规则全日潮流的分界线；东沙群岛附近海域以不规则全日潮流为主,旋转方向为顺时针；整个海域的最大流速分布与等深线基本平行,东沙群岛附近速度明显变大,最大值出现在台湾浅滩附近,最大值超过70 cm/s；南海潮波系统以巴士海峡传入的大洋潮波为主,分为三支潮流,以不同的形式进出南海北部海域；余流在台湾浅滩附近达到最大,超过6 cm/s,自南向北进入台湾海峡,近岸余流自东向西沿岸流动。本研究在东沙群岛周边的模拟结果与前人基于实测资料的分析吻合较好,并且由于采用了高精度的三角网格,本文对东沙群岛周边海域的潮汐潮流结构和性质的刻画和分析是迄今为止较为精细的,同时本研究还提高了对沿岸验潮站调和常数的模拟精度。
기우비결구삼각형망격적FVCOM (finite-volume coastal ocean model )수치모형,대남해북부해역적조석、조류진행료정세화수치모의연구,병근거모의결과상세분석료M2, S2, K1, O1분조적조석화조류특정。연구결과표명：신천항도갑자항해역표현위정규전일조성질,주강구부근해구조석이불정규반일조위주,기타해역주요표현위불규칙전일조；륙가해역화심수해역주요표현위왕복류,륙가파절구존재교강적선전류,륙가파절구위불규칙반일조류화불규칙전일조류적분계선；동사군도부근해역이불규칙전일조류위주,선전방향위순시침；정개해역적최대류속분포여등심선기본평행,동사군도부근속도명현변대,최대치출현재태만천탄부근,최대치초과70 cm/s；남해조파계통이파사해협전입적대양조파위주,분위삼지조류,이불동적형식진출남해북부해역；여류재태만천탄부근체도최대,초과6 cm/s,자남향북진입태만해협,근안여류자동향서연안류동。본연구재동사군도주변적모의결과여전인기우실측자료적분석문합교호,병차유우채용료고정도적삼각망격,본문대동사군도주변해역적조석조류결구화성질적각화화분석시흘금위지교위정세적,동시본연구환제고료대연안험조참조화상수적모의정도。
A high resolution hydrodynamic model was established using an unstructured triangular grid, FVCOM(finite-volume coastal ocean model)to study the tides and tidal currents of the northern South China Sea. The simulation results were in good agreement with observation data. According to the simulation results, the tidal and tidal currents characteristics of M2, S2, K1, O1 was analyzed. With the application of high resolution triangular gird, the characteristics of tide and tidal currents around the Dongsha Islands were computed exactly and analyzed in detail. The simulated tidal constituents were more accurate than previous study. The results showed that the areas between the Shenquan Port and the Jiazi Port were dominated by regular diurnal tide and the Zhujiang River Estuary was expressed irregular semi-diurnal tide. The tidal characteristic of other areas were irregular diurnal tide. The continental shelf area was dominated by rectilinear, while the area near continental slope was characterized by strong rotary current. The shelf break area is the boundary between irregular diurnal and irregular semi-diurnal tidal currents. Dongsha areas were dominated by irregular diurnal tidal currents in which the currents rotate clockwise .The distributions of the maximum possible current velocities were paralleled with the depth. The possible velocity was especially high around the Dongsha Islands and the maximum velocity could reach 70 cm/s near the Taiwan Strait. For the northern South China Sea, the tidal motion was maintained by the ocean tides from the the Bashi Channel, which were divided into three different forms out of the northern South China Sea; The maximum residual current appeared on the west of the Taiwan Strait, which flowed into the Taiwan Strait from south to north at a speed of 6 cm/s. The coastal residual current flowed along the China Shore from east to west.