Dredging techniques for contaminated sediment
Type:
Presented during:
WODCON XVII: "Dredging in a Sensitive Environment" - 2004, Hamburg, Germany
Authors:
Y. Murota, Y. Kurumada, and N. Moriya
Abstract: Dioxin pollution of sediment has been increasingly attracting social concern in Japan. An extremely important reason why measures for sediment cleaning must be taken immediately is that Japanese people typically consume a large volume of seafood, such as fish and shellfish, which creates a higher risk of the accumulation of such pollutants in the human body through eating these foods. Contaminated sediment removal by dredging, one of a range of decontamination measures, is considered as the most effective. More advanced dredging techniques are, however, required in view of the state of dredging accuracy and preventive measures for controlling the spread of turbid water while dredging, both items which require more monitoring than conventional techniques.
We have now developed a series of new techniques, i.e. "Environmental Dredging Method," "Real Time Environment Monitoring System," and "Shallow Soil Stabilization Method" which aim at the environmental dredging of contaminated sediment.
Keywords: environment, dredging, monitoring, stabilization, contaminant, dioxin