威海国际海水浴场三氮四季变化及污染形势分析

对威海国际海水浴场的海水在四季中的三氮化合物进行了检测分析，结果表明，该海水浴场水质中无机氮含量具有夏秋季高，冬春季较低的特点．无机氮主要以N03^-N为主，而且无机氮、N03^--N四季变化特点相同．NH4^＋-N冬春两季较高，但均未超过N03^--N，NH4^＋-N和N03^--N四季变化趋势相反．N02^--N一直处于较低水平，且与NH4^＋-N的变化相同．该海水浴场水质较好，四季均达到海水水质二类标准，但夏季无机氮含量接近标准值．针对未来几年国际海水浴场夏季可能出现的污染状况，应采取相应措施，保持海水的质量，以避免对游客健康的危害．

THE SEASONAL VARIETY OF THREE STATUS OF NITROGEN IN WEIHAI INTERNATIONAL BEACH AND THE ANALYSIS OF THE POLLUTANT TREND

Based on the monitoring and analysis of inorganic nitrogen （DIN） and the three status of nitrogen in the four seasons in Weihai international beach, the results show that the contents of inorganic nitrogen has high ＂level in summer and autumn while low level in spring and winter. The main component of DIN is NOf - N and they have the same seasonal variations characteristics. NH4^- -N has a high level in spring and winter but never oversteps the level of NO3^-- N. Besides, NO3^- - N and NH4^- - N have the opposite variety trends characters. The NO2^- -N concentration is low all the time and has the same variety trends with NH4^- -N. The seawater quality of the Weihai international beach is good and meet the second grade standard of seawater. However, the DIN concentration in summer nearly reach the maximum of the second grade standard. According to the possible pollution condition in the next few years in this beach, we should take relevant measures to protect the seawater quality and avoid influencing the tourists＇ health.