Abstract
There are weathered and erosive reddish soils called “Kunigami Maaji” in the northern part of Okinawa-jima. The distribution area of the reddish soils inclines steeply toward the seashore. The running water due to the typhoon and heavy rain erode the reddish soils. The flow out soils have made the sea water contamination, and it gives us the problem of environmental geotechnics.
The non-woven sheet has been used to filter the muddy water running into the deposit pond. The purpose of this experimental study is to investigate the changes of the permeability of the filter caused by clogging of the reddish soil particles. The experiments with 3 types non-woven sheets were carried out in order to find the effect of the types of sort of sheet, for representative soils and concentration of muddy water.
