苏北低地系统及其对海平面上升的复杂响应

SYSTEM OF NORTHERN JIANGSU LOWLANDS ANDITS COMPLEX RESPONSES TO THE SEA LEVEL RISE

苏北低地位处我国沿海中部，地面平均高程３ｍ左右，平均坡降多在０．２－２之间，河渠水面比降平均为０．０４，极易发生洪涝灾害。未来海平面上升，将对这一洪涝灾害频发地区带来较为严重的危害。本文通过剖析苏北低地系统状态与结构，考察低地系统对海平面上升的复杂响应过程，以寻求系统对未来全球变化的积极适应方式。

The system of northern Jiangsu lowlands has its particular states and structures due to the seariver interaction.It is a low-lying plain with a mean elevation of about 3 metres above sea level.Itsslope gradient is about and the mean gradient of channels' water stage is Bymaking the digital elevation model and analyzing the Quaternary sedimentary facies,the system ofnorthern Jiangsu lowlands is divided into three parts: the ancient lagoon low-lying plain of Lixiahearea, the marine plain along coastal area and the Changjiang river delta plain.The sea level rise willhave severe effects on the system, which will be more frequently endangered by flood and water logging.Through analyzing the states and structures of the northern Jiangsu lowlands system.this paper studies its complex responses to the sea level rise, and gives the measures adapted to the sea levelrise.