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Water Quality of Pearl’s West Estuary and Rapid Forecast Determination of Red Tide

Author: XuWenBiao
Tutor: DuanShunShan
School: Jinan University
Course: Environmental Science
Keywords: The Xijiang River estuary of the Pearl River Red tide Eutrophication Ammonium nitrogen COD Suspended solids The chlorophyll physiological index
CLC: X55
Type: Master's thesis
Year: 2002
Downloads: 222
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Abstract


Aquatic ecosystems in the analysis , and comprehensive survey of the mouth of the Pearl River Xijiang since 1988 on the basis of relevant water quality data from May 2000 to February 2002 for the specific situation of the Pearl the Xijiang River estuary of focus on developing the two observational studies : (1) change of nitrogen nutrients and red tide relevance ; (2) of water lettuce biological pollution and the occurrence of red tide relevance ; ( 3) the water content of chlorophyll , the chemical oxygen demand , suspended solids , and the occurrence of red tide correlation . The results show that : ( 1 ) Pearl River Xijiang River estuary due to carry land-based sources of pollutants in the Pearl River freshwater flow strongly influenced the growth of phytoplankton phosphorus nutrition is not enough as the limiting factor , therefore , the dynamic changes of nitrogen nutrients ( especially ammonium nitrogen N) Characterization of planktonic algae growth and decline of the process ; (2 ) from the inland rivers of water lettuce to reach the Pearl the Xijiang River estuary waters salinity seasonal variations , a large number of deaths caused by decomposition of corruption organic pollution , contributing to the occurrence of red tide can be periodically ; ( 3) as a direct indicator of the monitoring red tide phytoplankton chlorophyll content of the water in the estuarine waters of the Pearl River Xijiang , choose water suspended solids and chemical oxygen demand as indirect indicators , not only to be able to effectively observe and predict local red tide occurrence and the the method is simple, easy , and can be used to meet the actual needs of the local Agriculture, Fisheries and self- monitoring and prevention of red tide fast . The mouth of the Pearl River Xijiang red tide in the pre- exponential chlorophyll (OD664/OD665) at 1.40 ~~ 4.60 COD in 2.5 ~ 3.0mg / L; before the outbreak of the red tide waters of ammonium nitrogen by monsoon affecting physical gathered in certain waters ammonium nitrogen content of the Pearl the Xijiang River estuary semi- enclosed bodies of water higher measured values ??, ammonium nitrogen content analysis is the best indication of the direction the estuary red tide organisms evolution parameters ;

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Marine pollution and its prevention
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