| 2018年秦皇岛风暴潮前后岸基站及浮标主要水质参数变化分析 |
| Analysis on the variation of main water quality parameters of estuary stations and buoys during a storm surge in Qinhuangdao in 2018 |
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| DOI： |
| 中文关键词: 风暴潮，入海口监测站，浮标，赤潮 |
| 英文关键词:storm surge, estuary monitoring station, buoy, red tide |
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| 中文摘要: |
| 对2018年8月秦皇岛风暴潮期间三个入海口岸基站及邻近海域浮标的监测数据进行分析，结果显示：风暴潮导致入海口水体中COD、总磷、总氮和氨氮含量均明显升高；风暴潮2天之后，三个入海口邻近海域均发生赤潮，此次赤潮的发生与风暴潮导致陆源入海污染物骤然大幅升高有关。此次风暴潮导致秦皇岛人造河口、大蒲河口和七里海三个岸基监测站的COD监测日均值最高分别达到15.83mg/L、8.70mg/L和7.92mg/L，约升高至前期的2倍、1.5倍和2倍；人造河口总氮变化不大，大蒲河口和七里海总氮升高30%左右；大蒲河口总磷变化不大，人造河口总磷为前期的3.5倍，升高幅度最大，七里海总磷为风暴潮之前两日的2倍，但未超过前一周的最高浓度；风暴潮当天及第二天，人造河口、大蒲河口、七里海氨氮日均值陆续达到最高，分别为2.34mg/L、1.11mg/L和0.12mg/L，分别为风暴潮前两日的7倍、3.5倍和10倍。风暴潮过后，入海口临近海域发生赤潮，浮标监测到叶绿素a最高值为76.4μg/L，pH和溶解氧也大幅升高；分析表明，此次风暴潮导致的入海口污染物突然大幅升高为风暴潮之后的赤潮发生提供了充足的营养基础。 |
| 英文摘要: |
| The monitoring data of three estuary stations in Qinhuangdao and buoys in adjacent sea area during a storm surge in August 2018 were analyzed. The storm surge resulted in a significant increase in COD, total phosphorus (TP), total nitrogen (TN) and ammonia nitrogen in the estuaries. Two days after the storm surge, red tides occurred in the adjacent sea area of the estuaries and the occurrence of the red tides is related to the sudden increase of pollutants input caused by storm surges.. Affected by the storm surge, the highest daily average of COD concentration reached 15.83mg/L, 8.70mg/L and 7.92mg/L in Renzao estuary, Dapu estuary and Qilihai estuary, which was about 2 times, 1.5 times and 2 times of the previous concentration, respectively. TN concentration in Renzao estuary changed little, while in Dapu estuary and Qilihai estuary it increased by about 30%. TP concentration in Dapu estuary did not change much, while in Renzao estuary it increased to 3.5 times of previous level and the rising range is the largest. TP concentration in Qilihai estuary was twice that of two days before the storm surge, but it did not exceed the maximum concentration of the previous week. On the day of the storm surge and the next day, the daily average of ammonia nitrogen in Renzao estuary, Dapu estuary and Qilihai estuary reached 1.43mg/L , 1.11mg/L, and 0.12 mg/L, respectively, which were 7 times, 3.5 times and 10 times of those of two days before the storm surge. After the storm surge, red tides occurred in the adjacent sea area of the estuaries. The maximum value of chlorophyll-a reached 76.4μg/L. At the same time, pH and dissolved oxygen increased significantly. The sudden and sharp increase of estuary pollutants caused by storm surge provided a sufficient nutritional basis for red tides after the storm surge. |
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