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http://dx.doi.org/10.7846/JKOSMEE.2012.15.4.314

Factors Controlling Temporal-Spatial Variations of Marine Environment in the Seomjin River Estuary Through 25-hour Continuous Monitoring  

Park, Mi-Ok (Climate & Marine Environment Team, Korea Marine Environment Management Corporation)
Kim, Seong-Soo (Climate & Marine Environment Team, Korea Marine Environment Management Corporation)
Kim, Seong-Gil (Climate & Marine Environment Team, Korea Marine Environment Management Corporation)
Kwon, Jinam (Marine Environment Research Division, National Fisheries Research & Development Institute)
Lee, Suk-Mo (College of Ecological Engineering, Pukyong National University)
Lee, Yong-Woo (Climate & Marine Environment Team, Korea Marine Environment Management Corporation)
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.15, no.4, 2012 , pp. 314-322 More about this Journal
Abstract
In order to elucidate temporal variations of temperature, salinity, pH, dissolved oxygen (DO), suspended particulate matter (SPM), dissolved inorganic nutrients, and chlorophyll a, we performed 25-hour continuous monitoring in the Seomjin River Estuary in March (dry season) and July (rainy season) 2006. We also investigated spatial variations of marine environmental parameters across a saline gradient. In the Seomjin River Estuary, continuous monitoring results revealed that salinity variations were mainly affected by tidal cycle in the dry season and by river discharge in the rainy season. In the dry season, the spatio-temporal distribution of dissolved inorganic nutrient (nitrate, nitrite, and silicate) concentrations showed a good correlation with tidal cycle. While nutrient concentrations in rainy season showed not much variance in time. There were 6 and 4 times higher dissolved inorganic nitrogen and phosphorus concentrations in the rainy season than those in the dry season, respectively. Silicate concentration was 43 times higher in the rainy season than that in the dry season. Chlorophyll a concentration was higher in the dry season than that in the rainy season showing high nutrient concentrations. The results of this study, spatio-temporal variations of marine environmental factors are determined by both tidal cycle and river discharge. It seems that chlorophyll a concentration is related to the river discharge than dissolved inorganic nutrient distribution.
Keywords
Seomjin River Estuary; Nutrient; River discharge; Tidal cycle; Chlorophyll a;
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