river hydraulics
1.The two main development tendencies of environmental hydraulics were introduced, first, ecological hydraulics with the research subject changing from abiotic components to biotic ones; second, to be associated with "3S" techniques with research water area changing from small areas to river basins.
2.Due to issues of Dongting lake districts flood composition, the evolution of sediment flow, the river and lake (R&L) distribution characteristic as well as the layout of R &L-dredging engineering, the article simulated the model of the Dongting Lake terrain change by using the GIS technology and adopted the limited volumetric method to establish the two-dimensional hydraulics computation model of lake in order to forecast the water level, the flow capacity, the speed of flow and changes of flow field after implemented the project, which have provided the reliable theoretic basis for the decision-making and implementation of renovation for river course, canal and harbor and river course-dredging engineering.
3.A brief introduction to scientific research in the Three Gorges Project(TGP) and the applications of research achievements is given,which include treatment of newly slited layer on the foundation of the first stage earth-rock cofferdam,dumping bottom technique of river closure in deep water,construction of cut-off walls in the second stage earth-rock cofferdams,3-D computer simulation of river closure,concrete casting alternatives and selection of major construction equipment for the second stage construction optimization of durability of raw materials of concrete,deep sliding resistance and stability of the intake dam section,the section of the intake of the power station,the intake penstock of the power station,layout and hydraulics problems of shiplocks,stability of high slopes of shiplocks,and optimization of the system structural anchor bars to reduce the risk of cracking in the concrete wall and 700MW turbine generator units.
4.Abstract: A brief introduction to scientific research in the Three Gorges Project(TGP) and the applications of research achievements is given,which include treatment of newly slited layer on the foundation of the first stage earth-rock cofferdam,dumping bottom technique of river closure in deep water,construction of cut-off walls in the second stage earth-rock cofferdams,3-D computer simulation of river closure,concrete casting alternatives and selection of major construction equipment for the second stage construction optimization of durability of raw materials of concrete,deep sliding resistance and stability of the intake dam section,the section of the intake of the power station,the intake penstock of the power station,layout and hydraulics problems of shiplocks,stability of high slopes of shiplocks,and optimization of the system structural anchor bars to reduce the risk of cracking in the concrete wall and 700MW turbine generator units.
5.Taking Ningxia-Inner Mongolia reach of Yellow River as a study case, a ice regime forecast data warehouse is established for the datamining concerned on the basis of the analysis on the ice regime changing law and its influencing factor of the reach, and then the conceptual mathematic model and Artificial Neural Network Model for the parameter calibration of ice regime forecast are built up with GIS in combination of the relevant empirical forecast models based on the principles of the hydrological flow muting, thermodynamics and ice hydraulics etc. , with which the design and development of the decision support system for the ice regime forecast with the integrated functions of information inquiry, model parameter calibration, temperature forecast and ice regime forecast are preliminarily discussed.
