《汉书·志·沟洫志》
可以各自顺从它们的情况，不要再用来灌溉了，这样就会百！流畅，水路自然就顺利，没有决河的危害了。 
可各顺从其性，毋复灌溉，则百川流行，水道自利，无溢决之害矣。 
Allow them to flow in accordance with their natural conditions and do not use them for irrigation. This way, the water will flow smoothly, the waterways will be passable without posing the danger of levee failure.