The pipeline crossing plan of cofferdam, diversion and deep-wide excavation is chosen finally by comparing it with other river crossing plans such as underwater trench digging and directional control drilling.

The construction diversion of the Tankeng Hydropower Station has the characteristics of big discharge and quick flow speed on its overflow cofferdam.

Design and construction methods on river diversion and river closure for the Laxiwa hydro project on the Yellow River, developed based on the hydrologic, climatic, topographic and geologic conditions, are described.

Through the research and the implementation of the navigation of the d iversion channel in TGP, and under the conditions of huge river diversion discha rge and extremely high navigation stream, the diversion channel satisfied the tr ansit capacity of passenger and goods and successfully solved the key technologi cal problems of the river diversion and the construction navigation.

Based on solution to vertical crack model of infinite flow present by Gringartens and by classifying micro-sections for produced cracks and integrating with vertical crack model of uniform flow rate, half analytic solution to unstable flow pressure at bore bottom for 200 numbers of micro-sections of cracks is derived.

Design and simulation of baffle of fume hood;

The efficiency of twin-tangential annular flow gas distributor was determined by structures of baffles and sleeves.

Velocity distribution in oxidation ditch can be improved by installing front bsffle and back baffle based on researches and sumulation tests, so that sludge deposit in the bottom of oxidation ditch can be eliminated.