The supersaturated total dissolved gas(TDG)generated during high dam spills may cause gas bubble disease for fish and ultimately endanger their existence.As more and more high-dam hydropower projects have been constru...The supersaturated total dissolved gas(TDG)generated during high dam spills may cause gas bubble disease for fish and ultimately endanger their existence.As more and more high-dam hydropower projects have been constructed in China,the environmental assessment of the supersaturated TDG is becoming more and more important.It is of great importance for quantitative impact assessment of the supersaturated TDG of high dams and for the construction of ecological friendly high-dam hydropower projects.Based on the conceptual summarization of the TDG production process,the TDG prediction model for high-dam projects,in which the ski-jump energy dissipation is adopted,is developed in the paper.The model is validated by field data and employed in the TDG prediction of a high-dam hydropower project to be built in southwest China.展开更多
A new kind of ski-jump-step spillway was reported. By means of the effects of the aeration basin, it supplies the sufficient aeration flow from the first step for stepped chutes, especially for large unit discharge. T...A new kind of ski-jump-step spillway was reported. By means of the effects of the aeration basin, it supplies the sufficient aeration flow from the first step for stepped chutes, especially for large unit discharge. The physical model experiments demonstrated that, this spillway makes a far better hydraulic performance as regards energy dissipation and cavitation damage protection than the current and conventional stepped spillways, and the unit discharge can be enlarged from about 50 m3/s-60 m3/s.m to 118 m3/s.m in order to significantly reduce the width of the spillways.展开更多
基金Supported by the National Natural Science Foundation of China(Grant No.50579043)the Open Foundation of the State Key Laboratory of Hydraulics and Mountain River Engineering(Grant No.0604)
文摘The supersaturated total dissolved gas(TDG)generated during high dam spills may cause gas bubble disease for fish and ultimately endanger their existence.As more and more high-dam hydropower projects have been constructed in China,the environmental assessment of the supersaturated TDG is becoming more and more important.It is of great importance for quantitative impact assessment of the supersaturated TDG of high dams and for the construction of ecological friendly high-dam hydropower projects.Based on the conceptual summarization of the TDG production process,the TDG prediction model for high-dam projects,in which the ski-jump energy dissipation is adopted,is developed in the paper.The model is validated by field data and employed in the TDG prediction of a high-dam hydropower project to be built in southwest China.
基金Project supported by the National Natural Science Foun-dation of China(Grant No.51479057)the PAPD(Grant No.3014-SYS1401)
文摘A new kind of ski-jump-step spillway was reported. By means of the effects of the aeration basin, it supplies the sufficient aeration flow from the first step for stepped chutes, especially for large unit discharge. The physical model experiments demonstrated that, this spillway makes a far better hydraulic performance as regards energy dissipation and cavitation damage protection than the current and conventional stepped spillways, and the unit discharge can be enlarged from about 50 m3/s-60 m3/s.m to 118 m3/s.m in order to significantly reduce the width of the spillways.
