Firstly, the present paper has established one-dimensional steadily saturated flow-sediment numerical model for contracted channel; then the discrete differential equations has been derived by a finite-difference method.

Cause analysis of river channel shrinkage at lower reaches of the Yellow River;

Adjustment of sediment transport capacity during channel shrinkage for lower Yellow River;

Discussion on channel shrinkage and its instability of the Lower Yellow River;

Feaibility study on river narrowing schemes for Yellow-River-crossingworks of Water Transfer Project from South to North;

Critical slope of shriveling channel adopting dredge to reduce the deposition in Lower Yellow River;