University of Gdansk, Faculty of Oceanography and Geography, Institute of Oceanography, Gdynia, Poland.
University of Gdansk, Faculty of Oceanography and Geography, Institute of Oceanography, Gdynia, Poland.
Mar Pollut Bull. 2018 Feb;127:593-602. doi: 10.1016/j.marpolbul.2017.12.058. Epub 2017 Dec 29.
The aim of the present research was to determine the impact of intense rains and flooding on mercury riverine input to the coastal zone. This study focused on four small rivers (Reda, Zagórska Struga, Płutnica, Gizdepka), typical of the Southern Baltic region, with no significant mercury sources. Samples were collected for 16months during average flow conditions and during selected meteorological events: floods, downpours, thaws and droughts. Results showed decreased retention of mercury during intense rainfalls, thus demonstrating mercury elution from the catchment. Floods and melting snow also have a tremendous impact on the outflow of mercury from the catchment. Development of urban infrastructure and farmlands increases the outflow of mercury from the catchment too, making such areas a significant source of mercury in the river. On the other hand, areas with natural character, predominated by forests, stimulate retention of mercury that reaches them through dry and wet atmospheric deposition.
本研究旨在确定强降雨和洪水对汞向沿海地区河川输入的影响。本研究集中于四条小型河流（雷达河、扎戈尔斯卡河、普卢特尼察河、吉泽德普卡河），这些河流具有代表性，且位于波罗的海南部地区，没有明显的汞源。在平均流量条件下以及在选定的气象事件（洪水、暴雨、融雪和干旱）期间，收集了 16 个月的样本。结果表明，在强降雨期间，汞的保留量减少，表明汞从集水区中洗脱。洪水和融雪也对集水区中汞的流出有巨大影响。城市基础设施和农田的发展也增加了集水区中汞的流出，使这些地区成为汞的重要河流源。另一方面，以森林为主的自然特征地区，通过干湿大气沉降到达的汞，促进了汞的保留。
