Based on physical model, the article studies and discusses processes of the retrogressive and streamwise erosion, the corresponding equilibrium slope, scouring effects, and water level changes in the upper or down river of the imported seawater point.

Taking the bridge washing programme development as the example, this paper briefly introduces the developing flow of small- sized practical programme and mainly adopted technical treating methods.

On the basis of long time scour process experiments, the main feature and characteristics of the scour process are analysed, and a formula to describe the process under steady flow is established.

The examinational study on the local scour depth of roadbed along river;

Research on local scour depth calculation of roadbed along river;

Investigation on characteristics and scour depth of flow in river bend;