| 摘要 |
PROBLEM TO BE SOLVED: To create a seaweed bed having a base hardly flowed out by waves, or the like, and preventing the seaweeds from being extracted from the base even if strong water stream caused by the waves, or the like, acts thereon. SOLUTION: The seaweed bed is formed by laying a blast-furnace water-granulated slag having calcium carbonate films formed on the surfaces of the slug granules, or a mixture thereof with other bottom sediment-constituting materials on a sea bottom to form the base for attaching the underground stems or roots of the seaweeds, and inserting/proliferating the seaweeds in the base. The blast-furnace water-granulated slag has extremely larger stability in the sea compared to that of sea sand to extremely reduce the flowout caused by the waves, or the like, and further has high sear strength to cause strong force of constraining the seaweeds against the waves, or the like, to enable the underground stems and the roots of the seaweeds to twine around the base. As a result, the base itself is hardly flowed out by the waves, or the like, and the seaweeds are prevented from being extracted from the base even if the strong water stream caused by the waves, or the like, acts thereon. The problems of the elution of sulfur and the increase of pH of water at the initial time of laying the slag are properly evaded by using the blast-furnace water-granulated slag having the calcium carbonate films formed on the surfaces of the slug granules. COPYRIGHT: (C)2005,JPO&NCIPI
|
