| 摘要 |
<p>PROBLEM TO BE SOLVED: To restrain diffusion of muddy water caused as a result of activities in water at a low cost, by a structure hardly obstructing the construction.SOLUTION: The structure 2 includes: walls 3 surrounding a region where muddy water is generated in water; and an aperture 4 provided at a location facing a stream current anticipated in advance, in the periphery of the region. When the structure 2 is placed on the bottom of water, tops of the walls 3 are sunk. Transportation means 6 transports the generated muddy water to a prescribed place.</p> |
