Based on the date on scour around the rises system, the evolutionary processes of local scour, as well as the influence of wave and current parameters (water depth, current velocity, wave and so on) on maximum scour depth are studied.

The scoured terrain of the sea bottom as well as the scour depth-time curve and maximum scour depth at different inspection points were recorded.

The experiment results show that the maximum scour depth has relation to the runoff and the longitudinal axis trend of main abutment: the maximum scour depth is equal to 11.

Counting on the maximum scouring water depth in river bend;

This paper has discussed the river bend flow characteristics,the maximum scouring water depth position,and the protection range of river bank.

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;

Estimation method of scouring depth of lower reach of hydro-junction;

Discussion the scouring depth recommended by "Levee Engineering Design Standard";

Based on this research,the model nearby superposed flow spur and the velocity distribution of spur head flow were built,At last,a theoretical formula of scouring depth around pile permeable spur dike was derived from the models.

Taking Bayin River Crossing as an example,which is only a sechis of Hydraulic Protection Project for Sebei-Xining-Lanzhou Gas Transportation Pipeline,we have calculated the depth of scour in this section by using the scouring empirical formulae that have been widely used in the pipeline engineering.