Abstract
A lot of bottom sediments called “Hedoro” has accumulated in public water basins such as harbours, rivers and lakes. These bottom sediments “Hedoro” contain the organic matters or the toxic substances originated from waste water of industry or living. Therefore, the bottom sediments “Hedoro” are required to be excluded in order to clean up and to preserve the environment.
This paper deals with the physical, chemical and engineering properties of the bottom sediments “Hedoro” and the techniques for the dredging, the clarification of surplus water and management of the dredged bottom sediments.
