The results indicate that flow field in the bends of tidal estuary differs obviously from that in the bends of non-tide river,including the downstream increase of velocities in the estuarine bends,the bifurcation of mai.

Discussing the riverbed evolution ary regularity of the bottle-neck reach —Sampling manting river reach of Lancanjiang river;

This paper expounds the problems related to flood control to flood control planning for the outlet section of Nandu River and makes an ap-proach to the principle and dertermination of planning for flood control regulation lines, the determination of relevant parameters andcalculation conditions in analizing flood and tidal levels and the calculation of wave run-up.