Seasonal Hypoxia Occurrence at Terengganu Estuary, Malaysia and its Potential Formation Mechanisms

H. L. Lee, Fredolin Tangang @ Tajudin Mahmud, M. H. Wahap, S. Yang

Research output: Contribution to journalArticle

Abstract

Hypoxia is commonly defined as oxygen depletion when the dissolved oxygen (DO) levels fall below 2 mg L-1. In this paper, physical factors contributed to hypoxic condition in the diurnal tide, Terengganu Estuary has been experimentally and analytically studies. Hourly profiles on DO, current speed and nutrient were measured during the wet and dry seasons for continuous period approximately 30 hours, which cover both high and low tide at two fixed stations, located at the river mouth and 9.50 km upstream from the river mouth, respectively. It was observed that the entire estuary was free from hypoxia during the wet season. However, hypoxia was developed at the river mouth during the dry season with lowest reading of the DO level was 0.78 mg L-1. It was demonstrated that the combination of high contamination of nutrient, low current speed, the geometrical formation and water stratification are recognized as important role in formatting the hypoxia at the Terengganu river mouth.

Original languageEnglish
Article number012068
JournalUnknown Journal
Volume136
Issue number1
DOIs
Publication statusPublished - 22 Jul 2016

Fingerprint

Estuaries
Malaysia
formation mechanism
hypoxia
Rivers
Mouth
Dissolved oxygen
estuary
Oxygen
dissolved oxygen
Tides
river
wet season
Nutrients
dry season
tide
Food
nutrient
Reading
stratification

Keywords

  • dissolve oxygen (DO)
  • estuary dynamics
  • hypoxia
  • nutrient
  • river discharge

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Seasonal Hypoxia Occurrence at Terengganu Estuary, Malaysia and its Potential Formation Mechanisms. / Lee, H. L.; Tangang @ Tajudin Mahmud, Fredolin; Wahap, M. H.; Yang, S.

In: Unknown Journal, Vol. 136, No. 1, 012068, 22.07.2016.

Research output: Contribution to journalArticle

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