From the deeply-digging and low-weir in the past to almost no-digging in the present, the essential change of the administration mode of Dujiangyan has important social and economic values.

• 摘要都江堰的运行模式从“深淘滩、低作堰”的古制到现在基本不淘淤，其根本改变具有重要的社会和经济效益。