With the elevation of development and utilization level of the river,river hydrological situation has undergone great changes and threaten the rivers ecosystem.So protection and restoration of river ecosystem become the focus of attention.In gathering the measured series of daily flow sequence at Linjiacun station,Xianyang station and Huaxian station in Weihe River,the moving averages method and the Mann-kendall statistical test are applied to assess the traffic trends of the runoff sequence.Four methods su...