| 摘要 |
<p>PURPOSE:To prevent preferential growth conditions for red tide from being created and prevent thereby the red tide from generating by moving an air ejector with jet holes arranged over an extensive area in the about 10m depth of water, ejecting air from the holes. CONSTITUTION:If an air ejector 3 is towed by a mother ship 1 in the about 10m depth of water and at the same time, air is ejected from ejection holes 8 provided on the main wing 5 of the air ejector 3, the ejected air (a) stirs a nutrious salt formation layer A in the form of a foam soaring current. Consequently, the water depth H1 of the nutritive salt formation layer A located in the depth of 7 to 8m is shifted to a depth H2 of about 10m. In some case, as the layer A disappears and thus one of the red tide creative conditions is no longer present, it is possible to prevent the red tide from generating. The jet holes 8 provided in the air ejector 3 eject air to stir a broad area efficiently, so that the more extensively the jet holes 8 are arranged, the better.</p> |
