《明史·志·卷五十九》
河水从内地流出，海潮逆流，经过一段时间停留，泥沙随即淤积，因此一天天壅塞。
河潦内出，海潮逆流，停蓄移时，沙泥旋聚，以故日就壅塞。
The river water flows out from the interior, the tide flows in the opposite direction, and after a period of stagnation, sediment accumulates, and so it becomes more and more obstructed.