Analysis on water quality changes of buoys in Tangshan coastal waters after a storm surge"Lekima"in 2019
WANG Jiuliang
LI Zhiyong
LIU Dewu
LI Yue
LI Yansong
LIU Pengfei
LI Jiajun
WANG Qiuyan
Abstract：In August 2019,affected by storm surge Lekima,there was a sustained heavy rain in Tangs-han coastal area.The monitoring data of two buoy stations in the coastal water before and after the storm surge were analyzed.It was found that the daily average of water temperature decreased by 3℃ approximately,and the highest daily average of turbidity reached 38.6 ntu and 50.3 ntu,3.17 times and 12.89 times of those before the storm surge.At the same time,pH,chlorophyll-a and dissolved oxy-gen as well as salinity all showed small fluctuations,while the fluctuation range of water quality in the buoy station 2# was higher than that in buoy station 1 #.The highest daily average of pH,chloro-phyll-a and dissolved oxygen in buoy station 2# reached 8.25,2.882 ug/l and 7.7 mg/l,respectively,and the daily average of salinity decreased to 23.96％as the lowest.The results showed that during the storm surge,the continuous heavy rainfall brought a large amount of land sourced materials and strong wind waves,which led to the intensification of vertical mixing of water bodies and the rise of bottom layer materials,resulting in different amplitude changes of water quality parameters before and after the storm surge in the observed sea area.
Keywords：storm surgecoastal watersbuoywater quality
Publication Date：2024-10-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 73-79 )