APPLICATION OF ADAPTIVE MANAGEMENT TO A TIDAL FLAT IMPROVEMENT PROJECT AS A MITIGATION MEASURE OVER 20 YEARS

Abstract

 20 years ago, in Hiroshima, most of a river mouth tidal flat which is famous as flying place of waterfowls was being disappeared by reclamation project. Itsukaichi tidal flat was developed as a substitute land of it.
 But, there was not sufficient knowledge about how to develop the flying place of waterfowls at that time. In addition, it was forecast that soil subsidence might continue in the tidal flat for a long time.
 Therefore, the environment of the tidal flat has been reproduced as flying place of waterfowls by the adaptive management that keeps observing such as the waterfowl, the benthos, and the bottom sediment, and geographical features.