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DISSOLVED INORGANIC NITROGEN DISTRIBUTION DURING INTER-
MONSOON AND MONSOON SEASONS IN TERENGGANU RIVER ESTUARY.
Nur Fatihah binti Mohd Rosli
Supervisor: Dr Hing Lee Siang
Bachelor of Science (Marine Science)
School of Marine and Environmental Sciences
This study was carried out in Terengganu River estuary to determine the dissolved
inorganic nitrogen (DIN) distribution and to compare their concentrations between the
inter-monsoon (October 2017) and monsoon (December 2017) seasons. The range of
concentrations at surface layer for NO2 - -N, NO3 - -N and NH4 + -N in both seasons were
between 0.002-0.004 mg/L, 0.002-0.024 mg/L and 0.054-0.185 mg/L respectively.
For the bottom layer, the concentrations of NO2 - -N, NO3 - -N and NH4 + -N in both
seasons ranged between 0.001 - 0.009 mg/L, 0.009-0.034 mg/L, and 0.050-0.133
mg/L respectively. There were significant differences in NO3 - -N concentration between
the surface and bottom layers. Except for NH4 + -N, concentrations of DIN were within
the safety levels prescribed for mangroves estuarine and river-mouth water (Class E)
by the Malaysia Marine Water Quality Criteria Standard. In conclusion, total DIN
concentrations for the inter-monsoon season were between 0.003-0.102 mg/L which
were higher compared to the range of 0.002-0.091 mg/L for the monsoon season.
The higher DIN distributions were found at stations located at Nerus and Seberang
Takir rivers.
1900 | UMT UNDERGRADUATE RESEARCH DAY 2018