我认为前后航道治理有三复杂:工作复杂、水文复杂和地形地貌复杂,是不好搞的。洪水位为什么抬高?这就是复杂性。前后航道的洪水来源是流溪河、北江、西江及东江来水,最危害的是西江。因它带了泥沙来,要控制就要做思贤滘闸。华南师院张声才的文章写道,珠江三角洲淤积的河道多,冲刷的少。因为水道有宽有窄,流速就有快有慢,泥沙就沉积下来,河床就淤高。据清远县水利局领 I think there are three complicated waterway management before and after: complex work, complex hydrology and topography, which is not good. Why is the flood level elevated? This is complexity. The flood sources of the fore and aft fairways are the Liuxi River, the Beijiang River, the Xijiang River and the Dongjiang River. The most harmful are the Xijiang River. Because it brought sediment, it is necessary to do Sianxu gate to control. An article written by Zhang Shengcai of South China Normal University wrote that many rivers silted in the Pearl River Delta had less erosion. Because the waterway is wide and narrow, the flow rate is faster and slower, sediment is deposited, the river bed silt. According to Qingyuan County Water Conservancy Bureau collar