In this pa per, the main factors influencing the scouring stability of the cutting slope we re analyzed, according to which the evaluation indexes and corresponding members hip functions of the fuzzy evaluation for the scouring stability were determined , and a reasonable evaluation model was set up.

Some problems existing in practical application of tetrahedron concrete in river closure construction are analyzed through the comparison of its effect with that of oversize rock in stability of erosion control and convenience in construction.

The paper reviews the study on characteristics of scouring and deposition of the channels on the lower Weihe River and the lower Yellow River and verifies and compares the critical discharge of scouring and deposition derived from the theory of unbalanced sediment delivery by using the observed data of the lower Weihe River and the lower Yellow River with sediment concentration.