Application of the Delft Numerical models in the Lower Yellow River

Abstract

Because of heavy deposition and water shortage, the Yellow River faces the risk of flooding and no-flow since the middle of 1980s. The problem could be solved only by integrated water management. However, Dutch has a long history fighting the flood and gets a lot of experiences in water management, especially river ecosystem recovered after 1993 and 1995's flooding. It is now accepted that there is more to ensuring safety than continually making the dikes higher. It is helpful to learn the flood management practice in Netherlands. Based on the purvious points, the objectives of this study should primarily include following aspects: 1. Modeling methods of numerical model, focusing on a case study for lower Yellow River by use of the series numerical model developed by Delft Hydraulics, including flood forecasting and dredging. 2. Flood management practices in Netherlands, including flood defense measures, flood forecasting and warning system, compensate policy etc. It is a convenient way to study numerical methods by use of DelfBD model to calculate wandering reach. Running Delft3D model to simulate a flood process occurred in 1996 and comparing the calculated results with the measured data, we can easily know the advantage and disadvantage of the model. This is a base for a further cooperation too. In order to control flood hazard, dredging has become an important method. But, some problems, such as the recovery rate of dredged channel, have to be solved before the large scale of application. These problems will be studied by Sobek(Delft ID model) running combined with experimental data and the part field data analysis.