The construction difficulty of dike closure would be increased when multi-basin rivers are converged on the reclamation project area.

When the method of mud displacement by blasting is used to improve a foundation,treatment of the final closure is always the key and difficult point for quality control.

The paper analyzes the causes for the collapse of the final closure of a spoil dyke project and determines the safety factor of the collapse section by computation.

Application of "harmonized team" concept in project supervision of Longkou;

The analysis of urban expansion of Longkou cityon the basis of remote sensing techonology;

Winter Food Habits of Gorals in Longkou Nature Reserve of Heilongjiang Province;

In this model, empirical curve method isadopted for opened diversion channel, and broad crest weir theory is adopted for the river kerf.

The river kerf is simulated to trapezoidal or triangular section according to its width and the broad crest weir theory is used to formulate hydraulic elements calculating model in the period of the Changjiang river closure of the Three Gorges Project.

Influence of downstream water depth of closure gap on river closure difficulty;

Study and practice of technologies for protection and closure of extra-large closure gap of tidal estuary

According to the practice project of the Qingcaosha reservoir in the Yangtze estuary,the vertical 2Dflows with the free surface at the closure gap are computed using CFD method.