FLOATING STRUCTURAL BODY AND METHOD FOR CLEANING WATER BY THIS FLOATING STRUCTURAL BODY

摘要

PROBLEM TO BE SOLVED: To additionally effectively clean the water of rivers, lakes, ponds, etc., and to constitute a good scene where only aquatic plants drift by constituting floating structural bodies of floating base bodies consisting of floating materials and the aquatic plants planted on water absorptive materials and providing these floating base bodies with a floating property to expose the prescribed amt. of the volume of an ordinary state on a water surface. SOLUTION: The floating structural bodies are so adjusted that 1 to 20% of the volume of the ordinary state of the floating base bodies consisting of the porous water absorptive materials 1 and the floating materials 2 consisting of closed cell foamed plastic is exposed on the water surface by setting of the buoyancy balance between the water absorptive materials 1 and the floating materials 2. Emergent plants, such as Phragmites communis Trinius and Zizania latifoliza Turcz, and foating-leaved plants, such as Nuphar japonicum DC., water dropworts (Oenanthe stolonifera DC.) and water-cress (Nasturtrium officinale R. Br.), are selected as the aquatic plants 3 to be planted at the water absorptive materials 1 and are properly mingled and arranged. The floating structural bodies are used by floating these bodies on the polluted water basins of rivers, lakes, ponds, etc. The method of installation include a method for using a plurality of the floating structural bodies, installing the floating structural bodies in the ordinary state of enclosing, for example, the pond in the shoals of the pond or aggregating the floating structural bodies like islands near the center of the pond and floating the floating structural bodies on the water.