Effect of Resuspension on Nutrient Release from Sediment in Shallow Estuary.

The contents of nitrogen, phosphorus, and organic matter were 2 3 times higher in the sediments collected from a sampling point located at the river end than in the sediments collected in and outside the Port of Osaka.Further, the concentrations of these elements were 9 20 times higher in the interstitial water in the sediments collected from the river end than in the sediments collected from the port area and the estimated ‰uxes of ammonium and phosphate ions were 2 10 times higher in the former case than in the latter case. These potential ‰uxes from sediments in the river end were high even in winter when the activities of microorganisms were low. The sediment in this area is very loose and can be resuspended easily by turbulence, which causes the nutrients in the interstitial water to drift away. Therefore, dredging sediments in this area is expected to be eŠective in reducing the pollution loads in the stagnant water area inside the port.

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An Experiment in Sediment Removal Employing the "Resuspension Phenomenon" Resulting from Gale Force Winds

正弘¹,

英行²,

健³

et al. 2003

Mizu Kankyo Gakkaishi

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Effect of Resuspension on Nutrient Release from Sediment in Shallow Estuary.

Cited by 5 publications

References 7 publications

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Effects on nutrient load of removing sediments by maintenance dredging in the Port of Osaka

An Experiment in Sediment Removal Employing the "Resuspension Phenomenon" Resulting from Gale Force Winds

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