| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a new forced-circulation of water of lakes and marshes type light shield method which can suppress a proliferation of algae such as microcystis or perish even if a light shield member having a smaller area than that of a conventional light shield member is used, and an apparatus therefor. <P>SOLUTION: An introduction pipe 4 is suspended from the lower face side of the light shield member 3 floating on the water surface of the lakes and marshes 1, surface layer water is taken in from the upper opening of the introduction pipe 4, and the intake surface layer water is forced into the deep part of the lakes and marshes 1 from the lower opening through the inside of the introduction pipe, thereby shielding light by the light shield member 3 while water of the lakes and marshes 1 is flowed and circulated. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
