ABSTRACT:

In this report, the present author discussed on the actual situation of coastal pollution by the drifted garbage in the Japan Islands. The investigations of coastal environment were performed at a large number of seashores in the Sakishima Is. (Okinawa), Honshu and Hokkaido districts. The number of garbage drifted in seashore was counted and it was also divided according to its type and nationality. It was pointed out from the results of investigations that the problem of coastal pollution by the drifted garbage was a serious problem of coastal environment in Japan. It is strongly required that both the prevention measure and the way of disposition of the drifted garbage must be established in a hurry.

INTRODUCTION

The drifted matters, like plastic, bottle and so on, become one of the main factors in the sea pollution. As shown in Figure 1, a large number of seashores in this country are generally covered with the various types of drifted garbage which is transferred by riding the Black and Tsushima current. That is, as can be seen in Ph0tography 1, the many coastal-lines in this country have been contaminated by a lot of drifted garbage. Especially, in recent years, the problem of coastal pollution by the drifted garbage has become a very important environmental problem in this country. It is also proved that in addition to the garbage of Japanese make, one of foreign make from the neighboring countries is fairly contained in the drifted garbage. Then, by classifying the drifted garbage into the various types and nationalities in detail, the source of origination and the drifting route of the garbage may be estimated. In order to establish the prevention measure of the drifted garbage, the explanation of the source of origination and the drifting route will become very important.

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