Abstract
The pollution of the water quality with the eutrophication is a problem in shallow lakes and marshes. Especially, oxygen shortage in the bottom layer causes rendering down, doing of nourishment from the bottom mud, and the smell to be generated.
The bottom mud consumes the melting oxygen in the lake. And, living thing's inhabiting becomes difficult. The problem is lack of the melting oxygen. A desirable environment is made if there is more melting oxygen.
We examined the method of supplying oxygen to the bottom layer region. We devised the method of sending water which abundantly contained the melting oxygen with the pump and pipe lying on the bottom. We examined the practical use by using the simulation calculation. As a result, the result that we were practicable was obtained.
