Seasonal Variations in Inorganic Nutrient Budgets of the Bangpakong Estuary, Thailand |
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| Authors: | Anukul Buranapratheprat Tetsuo Yanagi Thanomsak Boonphakdee Pichan Sawangwong |
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| Institution: | (1) Department of Aquatic Science, Faculty of Science, Burapha University, T. Saensuk, A. Muang, Chonburi, 20131, Thailand;(2) Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan |
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| Abstract: | Seasonal variations in freshwater, salt, dissolved inorganic phosphorus (DIP) and dissolved inorganic nitrogen (DIN) in the
Bangpakong estuary, Thailand were investigated by employing the database obtained in the National Research Council of Thailand
(NRCT)-Japan Society for the Promotion of Science (JSPS) cooperative project from 1994 to 1997. The results showed that variation
in interaction between coastal sea and river discharge played an important role in controlling the characteristics of the
water in the estuary. Residence time of fresh water was short in wet season and dry season, but it was long in the transition
period from season to season. DIP and DIN load depended on river discharge, while high peak concentrations were related to
loading and the long residence time in the transition period between dry and wet seasons. A strong eutrophic condition could
possibly occur when the concentration of DIP and DIN were high during the onset of the wet season from April to July. The
annual average of inorganic nutrient budgets indicated that the Bangpakong estuary is the internal source of 38.2 tons/month
DIP and the internal sink of 4.9 tons/month DIN.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | Nutrient budget estuary Bangpakong LOICZ modeling residence time |
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