《汉书·志·沟洫志》
因为这全是黄河边被遗弃的荒地，百姓在这裹打草放牧，现在在这裹灌溉耕种，估计可以得到二百万石以上的谷。
故尽河堧弃地，民茭牧其中耳，今溉田之，度可得谷二百万右石以上。
Because it was all abandoned wasteland along the Yellow River, where people used to graze their animals and cut grass, it is estimated that more than two million shi of grain could be produced if it was irrigated and cultivated.