江苏盐城近岸海域水动力特征

HYDRODYNAMIC CHARACTERISTICS OF YANCHENG COASTAL AREA IN JIANGSU PROVINCE

通过2018年对江苏盐城近岸海域(射阳港至大丰港之间)布设的4个测流站位夏冬两季连续25 h海流、悬沙浓度的观测资料,对该地区的水动力特征进行了初步分析,结果表明:新洋港到四卯酉河口沿岸的潮流主轴的方向基本与等深线走向一致,呈现明显的往复流特征,射阳港附近站位(JS-YWPY01站)涨潮流以SW向为主,落潮流以NNE向为主;JSYWPY02、JS-YWPY03和JS-YWPY043站涨潮流均以SE向为主,落潮流均以NW向为主,JS-YWPY03站和JS-YWPY04站涨潮流流速大于落潮流流速;25 h内出现2次涨落潮,落潮历时大于涨潮历时,而涨潮流速大于落潮流速,最大流速一般发生在中潮位时刻,最小流速均发生在高潮或低潮时刻,测区一带潮汐属于正规半日潮,潮流在观测周期内呈现显著的变化特征。

Based on the observation data of current and suspended sediment concentration of four current measuring stations in Yancheng inshore sea area(between Sheyang port and Dafeng port)in 2018 for 25 consecutive hours in summer and winter,the hydrodynamic characteristics of the area are preliminarily analyzed.The results show that the main direction of the tidal current from Xinyang port to simaoyou estuary is basically consistent with the trend of the isobath,showing obvious reciprocating flow characteristics,and Sheyang port is attached In the near station(JS-YWPY01 station),the rising tide is mainly in SW direction,and the ebb tide is mainly in NNE direction;in JS-YWPY02,JS-YWPY03 and JS-YWPY04 stations,the rising tide is mainly in SE direction,and the ebb tide is mainly in NW direction,and the rising tide velocity in JS-YWPY03 and JS-YWPY04 station is greater than the ebb tide velocity;in 25 h,there are two ebb tides,the ebb tide duration is greater than the ebb tide duration,while the rising tide velocity is greater than the ebb tide velocity,and the maximum ebb tide velocity occurs The velocity generally occurs at the middle tide level,and the minimum velocity occurs at the high tide or low tide.The tide in the survey area belongs to normal semidiurnal tide,and the tide presents significant change characteristics in the observation period.