ThaiScience  


ENIVRONMENT ASIA


Volume 14, No. 03, Month SEPTEMBER, Year 2021, Pages 23 - 36


Seasonal and spatial variation of water quality in cardiff bay: analysis of historic data and future trend

Md. Sultanul Islam, Md. Nazmul Islam, and Syeda Marzia


Abstract Download PDF

The construction of a barrage in Cardiff , United Kingdom at the confl uence of the rivers, the Taff and Ely, created a 200 hectares freshwater lake in 2001. The study investigates the water quality trend in Cardiff Bay from January 2001 to September 2005, covering both summer and winter seasons. Eight water quality parameters were analyzed to assess any signifi cant pattern of seasonal variation and spatial distribution. The overall mean value of pH was 8.03; BOD, Ca, Mg, Cl, hardness, TSS were 1.20, 6.05, 3.33, 3.45, 11.72, 2.74 mg/L respectively; and orthophosphate (OP) was 0.08 µg/L. Mean values were mostly found higher in summer as compared to winter, notably in 2001. In summer, higher values of pH, BOD and hardness were attributed to enhanced photosynthesis leading to production of less carbonic acid, bacterial growth and dissolution of Ca and Mg respectively. The decreasing pattern of Cl and OP was refl ected in higher BOD and little possibility of eutrophication. The pattern of TSS was non-uniform and random. The water in Cardiff Bay, compared with relevant data of three artifi cial lakes, was found to be safe and within the guidelines. A future trend analysis suggested that pH, Mg, Cl and OP would decrease; BOD and TSS would increase marginally; Ca and hardness would remain unchanged in the site.


Keywords

Seasonal variation; Spatial distribution; Physico-chemical; Water quality; Freshwater lake; Cardiff Bay



ENIVRONMENT ASIA


Published by : Thai Society of Higher Education Institutes on Environment
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