Flood Control Response with the Change of Discharge and Silt Content in the Lower Reaches of the Weihe River

In this paper,the disadvantageous flood control response in the Weihe River Basin is lucubrated after analyzing the measured data of the change of inflow and silt content in the lower reaches of the Weihe River and the water-channel experimental results.The results show that the frequent occurrence of flood and the prolongation of flood duration in the lower reaches of the Weihe River are caused by many factors,such as the maintenance of the height of flood plain,gradual increase of stream water level,reduction of the riverbed gradient,silt sediment and development of the disadvantageous natural conditions,in which climate change and human activities are the dominant factors;silt discharge in the lower reaches of the Weihe River comes mainly from the Jinhe River,and inflow comes mainly from the regions upstream from Xianyang.Based on considering the serious situation of flood control in the lower reaches of the Weihe River,some measures are put forward,they are to regenerate the natural vegetation for reducing soil erosion and silt content of stream water,utilize water resources in saving way,implement the unitive water resources management,migrate the local residents out of the flood plain and dredge up the river channel.