温州南部鳌江口海域近年来先后完成了筑坝促淤、围垦吹填、维护航道等一系列影响水流泥沙和地形地貌变化的大型工程。根据2010年实测水文泥沙资料和4幅不同时期（1963，2003，2005，2011年）地形图对比分析了鳌江口海域的地形变化趋势，结果显示鳌江口海域海床冲淤过程大体上经过了3个不同时期，即1963-2003年江南围涂等海区缓慢淤积期；2003-2005年该海域既冲刷又淤积的稳定期；2005-2011年整个水域以轻微冲刷为主的冲刷期。经过分析得知鳌江口海域海床近年来的变化主要是由航道疏浚、围垦吹填及工程促淤引起的，而围填海工程引起动力变化和泥沙减少也对海床冲淤有一定程度的影响。%In recent years, there are a series of large completed projects in the Aojiang estuary at the south of Wenzhou, such as dam siltation, reclamation and maintenance of water ways, which probably affect the flow and topographic feature. Based on observed hydrological and sediment data in 2010 and four different periods of topographic maps ( 1963, 2003, 2005 and 2011) , the recent characteristics of topography evolution in Aojiang estuary are discussed. The results show that Aojiang estuary terrain experienced three different stages: the slow sedimentation period from 1963 to 2003, the erosion and situation steady period from 2003 to 2005, and the slight erosion period in the entire waters. The result of the analysis indicates that the seabed change of Aojiang estuary in recent years is mainly caused by the dredging and reclamation. Dynamic environmental changes caused by reclamation projects and the sediment reduction also have influence of a certain degree on the seabed.
展开▼
