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The Yellow River key reservoir projects bear on the big picture. The practices of planning, construction, operation and management of these key reservoir projects promote continually the deepening of the understanding of the governance of the Yellow River. Based on the planning and construction backgrounds of the Sanmenxia Reservoir and the Xiaolangdi Reservoir in the middle reaches of the Yellow River and their operation and management practices, this paper briefly reviewed the progress from practice to cognition to practice and cognition again, as well as the development and evolution of river harnessing thought through it. Based on the problems and challenges faced by the Yellow River management in the new era, this paper suggests to speed up the development of the Guxian key reservoir project. [ABSTRACT FROM AUTHOR]

The paper analyzed the characteristics of channel and overbank flood, such as the bankfull discharge, runoff and sediment and the evolution rule of Xiaobeiganliu section of the Yellow River. It built the actual relationship of storage capacity to forecast the overbank flood based on the measuring data of the stage and cross-section. When the high sediment overbank flood happened, the runoff volume decreased and stored in the bottomland and the peak hydrograph was attenuating. The paper built the runoff and sediment detention model to forecast the high sediment overbank flood. The results show that the test qualified rate of 21 forecasted overbank floods is 85.7% since 1960, the certainty coefficient is 0.87 and 0.93 and the peak discharge accuracy is 86.5% and 96.3% respectively of “August 1992” and “August 1996” flood forecasting. [ABSTRACT FROM AUTHOR]