The flow regime, sediment deposition and the loss of head of two head tanks of the sewage pumping station with different dimensions are studied by using a hydraulic model test method.

Based on the test data under dynamic water and static water, main factors which influence the fine sediment flocculation are analyzed using the relative analysis theory of the gray model analysis.

With the model test, this paper researches overbank flood sediment concentration and its gradation change rules from Jahe beach to Gao village river section of lower Yellow River.