《明史·志·卷六十一》
积蓄时间长然后削减湖水的痕迹不能再得到，湖水将好像使堤的高度降低。
积久而减水故迹不可复得，湖且沉堤。
If there is an accumulation over a long period of time, and then the water level is reduced, the mark of the lake water will no longer be visible, and the lake water will be as if it had lowered the height of the dikes.