抄録
In Ryukyu islands, the outflow of reddish-soils from the areas of public utility, developments of farmland and resort, establishments of the U. S armed forces becomes a very important social problem. The contamination problem of reddish-soils has given serious damage to the sea environment, fishing industry, tourist industry and so on. In this report, the authors propose a new method to estimate the degree of contamination due to the reddish-soils and discuss on the actual situation of contamination in the sandy-seashores and the some beaches at ebb tide in Ryukyu islands.
