Akanoi Bay after the soil amendment project in 1965

(1) A rice field has been irrigated with water pumped up from the lake and

(2) Small streams and brooks have been straightened so that the drainage capacity can be increased.

As a result,

(3) The population has increased, factories have been established and the urban area has expanded rapidly.

(4) The quantity of contaminants generated increased.

(5) Natural purification capability of streams and marshland decreased remarkably.

(6) As a result of continuing sludge sedimentation on the lake bottom, Akanoi Bay is said to be the most eutrophic water area in Lake Biwa.