Author(s): Kazuo Murakami; Ihroichi Tsuruya; Isao Ilrie
Linked Author(s): Kazuo Murakami
Keywords: No Keywords
Abstract: Submerged breakwaters were constructed in order to cope with the shoaling to waterway and anchorage due to siltation in Kumamoto Port in Japan. Because of the tidal currents and waves, bottom sediments are eroded, transported, and settle down to the sea bottom again. Near the sea bottom, a high concentrated fluid mud layer is generated by the settlement of suspended fine sediments. The layer has large influence on shoaling to waterway and anchorage in a port. In order to predict the siltation volume in a port surrounded by submerged breakwaters, a three-dimensional mathematical model of sediment transport is developed. The model can treat both the convection-diffusion behavior of suspended materials in a water column and the density current movement in a fluid mud layer. Field observations were carried out to know the mechanism of sediment transport and to verify the mathematical siltation model. After the calibration of siltation rates is completed, siltation volume in the port is calculated under the typhoon weather condition
Year: 1995