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Change Pattern Analysis of the COD and Nutrient Concentration in Jumunjin Harbour, Gangneung  

Cho Hong-Yean (Coastal and Harbor Engineering Research Division, KORDI)
Kim Chang-Il (Coastal and Harbor Engineering Research Division, KORDI)
Lee Dal-Soo (Coastal and Harbor Engineering Research Division, KORDI)
Han Dong-Jun (Department of Environmental System Engineering, Engineering Division, Gangwon Provincial University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.18, no.3, 2006 , pp. 211-224 More about this Journal
Abstract
It was analysed that spatial and temporal change patterns of COD, TN and TP were measured monthly from 2002 to 2005 in Jumunjin Harbour. Cenerally, concentration of upper layer higher than lower layer, concentration difference of COD, TN and TP on upper lower layer at inner zone in Jumunjin Harbour higher than sea area front of breakwater. Seasonal change width of COD concentration different, but seasonal change pattern of COD, $NH_{4}-N$ and TN clearly showed. Water quality improvement effect of seawater exchange facilities and sewage treatment plants is analysed quantitatively using averaged spatial and temporal data set. Change of COD small at 2003, concentration reduced about $34{\sim}47%$ at all zones on 2004 and 2005. TN was influenced largely effect of seawater exchange facilities. Concentration reduction at zone 1, 2, 3 estimated about $60{\sim}70%,\;40{\sim}60%,\;40%$, respectively. As a consequence, concentration reduction of COD and TN that is, effect of water quality improvement influenced seawater exchange facilities appeared not only at inner zone, also sea area front of breakwater and entrance of Jumunjin Harbour.
Keywords
Jumunjin Harbour; seawater exchange facilities; sewage treatment plants; nutrients;
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