STUDY ON SEDIMENT PURIFICATION TECHNOLOGY BY USING "ARTIFICIAL NEST HOLE" IN ARIAKE BAY

Abstract

  To solve the various environmental degradations cased by sediment deterioration, it was devised the sediment improved technique by using "Artificial nest hole", and then a field experiment had been performed since 2006 in Ariake Bay. a field experiment has been performed by using the new artificial nest hole which improved problems like a deposition of floating mud in the artificial nest hole since 2009.The experiment shows that the new artificial nest hole has the sediment purification effect by the penetration. In addition, seepage analysis performed to evaluate the extent of the impact of sediment purification effect, and considered practicability of "Artificial nest hole".