翻开历史，我们的先人在与洪水做斗争的实践中，没少研讨如何治水。比较有代表性的人物是西汉的贾让，他对治水提出了上中下三策，上策是河不设防、不与水争，中策是凿渠疏浚、分流水势，下策是修补堤防、限而治之。这三策是颇有道理的，大禹治水就是佐证。据《史记》载，远在 Open history, our ancestors in the practice of fighting against the floods, did not discuss how to deal with water. The more representative figure is Jialing of the Western Han Dynasty. He proposed three strategies for water control. The best policy is that the river is undefended and not competing with water. The middle strategy is water dredging and diversion. The best strategy is to repair dikes. And governance. This three policy is quite justified, Dayu flood control is evidence. According to “Historical Records” contained, far away