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.

Numerical results show that for fired points in this all sea areall sea bed erosion results in streng thening of wave field; the change of wave parameter increases with erosion depth, the distrbution of peak values of both nea.

This paper describes the tests for the relative erosion depth under two different testing water depths, with the result that shows that the model scale has not much striking effect on the erosion behavior at front of a breakwater.