Abstract
It has been verified that covering method using granulated coal ash plays important roles in reducing and preventing the elution of eutrophic elements such as phosphorous, nitrogen and sulfide compounds from sea bottom sediment into sea water in the head of Hiroshima Bay. In this study, a new model is developed for simulating the improvement effects of sediment in granulated coal ash-layer. Parameters used in the model, for example, the trapped amount of sediment in the pores of granulated coal ash- layer, the reduction of sediment volume, etc., are determined by field observations and laboratory experiments. The simulated results are evaluated on the basis of the observed data, and it was found that the relation between the simulated results and the observed results show the another phenomena occurring in the layer.
