Developing Process of Reclamation and Sustainability of Multiple Subsistence

在潮地的填海或土地改良方面已作了大量的努力。然而，似乎缺乏对填海土地可持续性和可持续生存系统的考虑。这种可持续性是在第二次世界大战后引入圩田（双堤式复垦）之前通过单堤式复垦实现的。主要原因是大多数定居者不仅在填海土地上耕作，还在潮滩上捕鱼。这种多重生计为理解潮汐地的可持续利用提供了关键。

A great deal of effort has been made on the reclamation or land improvement in tidal land. What seem to be lacking, however, is a consideration on sustainability of the reclaimed land and a sustainable subsistence system. This sustainability was made possible by the single-dike type reclamation before introduction of inpoldering ( the duplex-dyke type reclamation ) in the after Word War II. The main reason is that most settlers engaged not only farming in reclaimed land, but also fishery in tidal flat. This multiple subsistence offers the key to an understanding of the sustainable use of tidal land.