Abstract: Controlling dynamically the limited level of reserwirs during the flood season is one of the main methods of utilization flood reurces.Improving the flood forecast accuracy and period is the key to controlling dynamically the limited level of reserwirs during the flood season.Firstly,the paper illustrates the advances of the new generation of the weather radar,the meteorological satellite and the related application systems,and the roles of the new technology in the real time operation of reserwirs are discussed.Then,the methodology and the technical framework of improving flood forecast and optimizing the impounding scheme of the reservoirs by using synthetically the new technology are proposed.Based on this,the dynamic control range of the limited level of reservoir is analyzed synthetically to use flood safely wrath the Panjiakou Reserwir in the Haihe River Basin as an example,and the impounding strategy and regulating method of reservoir during the flood sewn are provided.