Restoration Study of Dredging in Lake Kasumigaura.

摘要

Lake Kasumigaura is the second largest lake in Japan and is eutrophic. The sediment has adverse effects upon water quality and has a thickness of about 40 - 50 cm. In order to remove sediment as a link in the chain of restoration, dredging is now partly under way. However, problems remain as to how the secondary impacts by dredging can be abated and how to manage the dredged material. An outline of past and future studies of these problems is presented.