木曽三川河口部における干潟再生の一考察

抄録

In the estuary of Kiso-sansen in Ise Bay, where once there was a good fishing ground with abundant shellfish, the fisheries resources fell off along with decreasing of tidal flats and shallow waters due to land subsidence and reclamation activities. Under those circumstances, two artificial tidal flats have been created in the estuary from 1993, as a part of effective usage of construction sediments at Nagara Estuary Barrage.

Topographic survey, bed material and benthos monitoring have been continued in the artificial tidal flats since 1993. Analyzing results from the monitoring, it was verified that the purpose of initial design, restoring shellfish habitats, was almost achieved. The functions of tidal flats such as purifying of water and providing fisheries resources were ensured.

These monitoring projects were conducted with cooperation from the local fishermen, and monitoring results were shared. It is expected that these results will be effectively utilized for sustainable fisheries of this local area.