三门湾网箱养殖造成的水文动力环境变化分析

Analysing the change of the hydrodynamic environment result from cage culture in Sanmen Bay

三门湾网箱养殖具有一定的规模。为了解网箱养殖对水文动力环境造成的影响,本研究以键跳港附近海域架设的网箱养殖区作为研究对象,在网箱养殖区周围4个方向各布设1个测点,根据2009年6月网箱布置前后25h的连续潮流观测资料,采用短期潮汐观测资料分析方法进行调和分析,计算得到K1、O1、M2、S2、MS4、M4等各个分潮的潮流椭圆要素(Wmax、Wmin、Q、time、k)数值。根据《渤海、黄海、东海海洋图集水文》中的潮流类型分布图,该海域属于正规半日潮流类型,半日分潮M2、S2为主要潮流,由于调和分析结果中半日分潮并不明显,因此,本研究以网箱布置前后调和分析结果中各个分潮最大值的和值作为对比值,来分析网箱养殖导致的水文动力环境变化。结果表明,网箱养殖造成的流速变化率为-19.19%～-5.26%。

The cage culture in Sanmen bay have certain scale ,this research we form a hypothesis to set- up cage culture zone at Jiantiao port sea area, around the cage culture zone,we lay four stations in four directions to take an observation of tide in 25h continuously. And adopt street observation＇s analysis of data method vsa day（25 h） flows observation the data carry on accordion t0 harmonic anal- ysis. The computing receives elliptical parameters of constituent tide of K1, O1, M2, S2, MS4, and M4 etc（Wmax.Wmin ,Q,time.k）. According to the flows type distributes chart in the Marine atlas of Bohai Sea Yellow Sea East China Sea： Hydrology Marine atlas of Bohai Sea Yellow Sea East China Sea, the Sanmen Bay sea area belong to the normal semi--diurnal tide. because the constituent tide of the harmonic analysis result is not obvious, this paper use the summation of all max value of the con- stituent tide to carry on contrast, and analysing the change of the hydrodynamic condition by cage cul- ture,rate of change of velocity --19.19%--5.26%.