Research on Influence of Flow Velocity Regime and Sediment Deposit before Underground Hydroelectric Station,Three Gorges Project

Abstract:

Based on test results of physical model, flow rate and regime and sediment deposit of underground hydroelectric station and diversion canal within 70-year operation of Three Gorges Project (TGP) have been analyzed. The primary reason of complicated flow regime before underground station is the confluence and interaction of two spout of flow, one comes from the diversion channel of underground hydroelectric station, the other comes from the communicating canal between underground station and right bank station, caused by excavation of Pianyanzi-mountion adjacent to dam. The head lose of power generation was increased due to that the increasing of the projects operational time, amount of sediment deposit before dam and discharge through the communicating canal strengthened intensity of reflow and surface velocity of approach. In order to make the mixed flows become single and forward flows in flood season, as well as reduce head lose of the station and improve the unit power generation benefit, we suggest to build dividing dike of communicating canal during the projects early operation time.

• Periodical: Advanced Materials Research (Volumes 779-780)
• Pages: 1359-1364
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.779-780.1359
• Online since: September 2013
• Authors: Jian Cheng Huang, Feng Yang Min
• Keywords: Flow Velocity, Regime, Sediment Deposit, Three Gorges Project (TGP), Underground Hydroelectric Station

References

[1] Huang Jiancheng et al. The special study of the sedimentation problems on underground hydroelectric station, Three Gorges Project. Changjiang River Scientific Research Institute (2006).

[2] Three Gorges Project Sediment Panel. The special study on Three Gorges Dam area (1996-2002). Beijing: Intellectual Property Press (2002).