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基于2013年夏、冬季的最新实测资料,分析研究了滦河口海域温度、盐度、Chl a、浊度和DO等水文环境要素的季节性变化特征。结果表明:温度季节性差异较大,夏季呈现近岸向远岸递减之趋势,冬季与夏季截然相反,呈现由近岸向远岸递增之趋势;冬季水体的盐度要高于夏季,河口南部近岸存在向南流动的低盐水舌,夏季的范围大于冬季;冬季水体的浊度远高于夏季,且在河口以北和以南海域存在高值区,表现出“夏储冬运”的输运特征。冬季水体的Chl a和溶解氧也高于夏季,反映了Chl a、DO与温度的负相关性。各水文要素与潮汐潮流之间具备一定相关性。温度、Chl a、DO的变化极有规律,涨潮期间,温度、Chl a和DO减小,落潮期间增大,单周日内表现出双峰结构,且峰值不同。水体浊度在周日内也出现两次峰值,均出现于两次较大流速发生时刻。
Based on the latest measured data in summer and winter of 2013, the seasonal variations of hydrological factors such as temperature, salinity, Chl a, turbidity and DO in the Luan estuary were analyzed. The results show that the seasonal variation of temperature is relatively large, and the trend of decreasing from nearshore to the far shore in summer shows the opposite trend in winter and summer, showing an increasing trend from near shore to far shore. The salinity of winter water body is higher than that in summer and south of estuary There is a low salt water tongue flowing to the south coast in summer, and the winter is greater than in winter. The turbidity of winter water body is much higher than that in summer, and there are high values in the sea areas north and south of the estuary. Transport characteristics. Chl a and dissolved oxygen in winter water are also higher than those in summer, reflecting the negative correlation between Chl a and DO and temperature. There is some correlation between each hydrological factor and tidal current. During the high tide, the temperature, Chl a and DO decreased, and during the ebb tide increased, the bimodal structure appeared in single week, and the peak values differed. The turbidity of the water body also appears two peaks within the weekday, both of which occur at the moment of two larger flow rates.