Journal
MARINE POLLUTION BULLETIN
Volume 127, Issue -, Pages 593-602Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.12.058
Keywords
Mercury; River; Sea; Downpour; Flooding; Land use
Funding
- National Science Centre [2014/13/B/ST10/02807]
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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, Zagorska Struga, Plutnica, Gizdepka), typical of the Southern Baltic region, with no significant mercury sources. Samples were collected for 16 months 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.
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