Abstract
To clarify change and actual condition of inflow load and sea environment in Osaka Bay from a not only quantitative but also qualitative point of view, loading amounts of COD, phosphorus, and nitrogen from 1980 to 2005 were estimated by collecting and analyzing statistical data about rivers, coastal waters, sewerage systems and so on. As a result, it was revealed that the plan outlined for reducing total pollution loads and the construction of sewerage system for years have shifted a nutrient balance of the inflow load and brought about changes in water quality structure and ecosystem in the bay. Moreover, analysis results indicated that nutrient loads caused by flood which people couldn't control had a significant impact on an annual total load compared with inflow loads in the ordinary condition.
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Schedule a callMore From: Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
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