珠江河口滩涂围垦动态及其影响

Shore reclamation in Pearl River Esturay and its impact analysis

针对围垦给珠江三角洲地区带来大量土地的同时,也会影响河口水文及滩涂发育的实际问题,利用多时段卫星影像资料及水动力模型,对20世纪70年代末至21世纪初珠江河口滩涂围垦进程进行了分析,模拟并定量研究了不同径流与潮流耦合水文组合下,海岸自然演变及按规划围垦等对河口水文情势所产生的影响.结果表明:在充分考虑海岸自然演变形态条件下进行有序适度的围垦,仍可保证河口的水文及水力学要素按自然演变规律演化.

The shore reclamation created large area of land for the Pearl River Delta region.However,it also affected the hydrology and the shore evolution in the estuary.The reclamation process in the Pearl River Estuary from the end of the 1970s to the beginning of the 2000s was analyzed by use of the satellite images with multi-period data and hydrodynamic models.The influences of natural shore evolution and reclamation planning on the river regime in the estuary were simulated and quantitatively studied under coupling hydrology of different runoffs and tidal flows.The results show that the appropriate reclamation after a full consideration of natural shore evolution can still ensure the regular and natural evolution of hydrologic and hydraulic elements in the estuary.