一、磨刀门水道历史时代变迁磨刀门是珠江八大口门中最大的一个,排洪量占西、北江总排洪量21.5％。1968年下泄量达13,380秒立米,占马口站流量32.9％,占西、北江总流量24.7％。它又是潮差最小的一个,平均潮差只有0.86米,最大落潮差为2.29米,最大落潮 First, changes in the history of Shaodongmen Waterway Saber is the largest in the Pearl River eight mouth, the flood volume accounted for 21.5% of the total discharge of Beijiang River. In 1968, the shipments reached 13,380 seconds, accounting for 32.9% of the total station traffic in Ma’bu Station and 24.7% of the total traffic in the West and North Rivers. It is the tide of the smallest one, the average tidal range is only 0.86 meters, the maximum ebb is 2.29 meters, the maximum ebb