【摘要】 在河道中大量、大范围地采沙使得西、北江及三角洲河底高程大幅下切 ,再加上 1994年后接连四场大洪水对河床的冲刷及对河道的人工治理 ,使河道产生了很大的变化。三水站河床大幅下切 ,水文要素亦相应地发生了很大的变化 ,直接影响着防汛工作。更多还原

【Abstract】 The bed level along the West river, the North river and the delta has been deepened enormously because the sand in these places has been dug in large quantities. What is more, the riverway has been altered greatly because the flood scoured the river-bed continuously for four times since 1994 and the river course has undergone man-made control. The enormous deepening of riverbed at Sanshui Station and the corresponding hydrologic changes result in the direct negative influence upon the prevention of flood.更多还原