settlement and church The old town 3he new town 4. Commerc atbout Ship tonnage 5. Mcdem sea Time he rapid uplift of the land along the coast of Norrland, 80-90 em in 100 years, made it necessary to move ports down to deeper water. The increasing draught of modern ships has speeded up this process 海岸地面抬升1cm/a)促使港囗向河流下游深水处迁移,船 只吨位(吃水深度)的增加亦加速了该过程一港口城市形成海岸地面抬升(1cm/a)促使港口向河流下游深水处迁移, 船 只吨位(吃水深度)的增加亦加速了该过程—港口城市形成