Restoration And Expansion Of Research Capacity Of Small Reservoirs Hennessy

Reservoir as an important part of China’s flood control system and water infrastructure over the years played a significant role in flood control, irrigation, water supply, power generation, improve the ecological environment, etc.The main function of small reservoirs is flood control and Hennessy regulation. At this stage the main problem faced by small reservoirs is due to siltation problems or design criteria was inadequate, leading to Hennessy capacity decrease or disappear, so that the function of the reservoir can not be achieved Hennessy, affect the effectiveness of the play. In this paper, according to the Sink Characters and characteristics of the flood flow hydrograph are classified the small reservoirs. According to the reservoir storage capacity curve will be divided into mountain reservoirs reservoir, plain reservoir,reservoir Ⅰ mixed, mixed Ⅱ reservoir four categories, By flood flow process line can be divided into type Ⅰ and type Ⅱ.For the four types of storage capacity combined with the flood line, model, and each build a practical model reservoirs weir, spillway gate was built, the construction of the labyrinth weir three kinds of engineering measures alterations.To check flood control conditions, the total reservoir capacity under the same circumstances, in the full use of limited water resources in principle,in the reconstruction of the spillway at the same time, proposed to raise the reservoir’s normal water level, increase reservoir storage capacity make the project play a greater social and economic benefits.For mountain reservoir, the flood line is whether decentralized or centralized reservoirs, while maintaining the check flood level unchanged for improving this type of reservoir useful storage capacity can take spillway sluices engineering measures.For plain reservoir, the flood line is whether decentralized or centralized reservoirs,while maintaining a constant check flood level, Hennessy capacity for this type of reservoir engineering measures can be taken to improve the reconstruction of the labyrinth weir.For hybrid Ⅰ type reservoirs, the flood line is dispersed reservoirs, while maintaining check flood level unchanged, Hennessy capacity for this type of reservoirrecovery and reconstruction measures for the expansion project spillway sluices;flood line centralized reservoirs, while maintaining the constant checking flood,reservoir Hennessy capacity for such restoration and expansion project for the reconstruction measures in the form of labyrinth weir reconstruction.For hybrid Ⅱ reservoir, the flood line is dispersed reservoirs, while maintaining a constant check flood level, Hennessy capacity reservoir for such restoration and expansion project for the reconstruction measures alterations labyrinth weir manner;flood line is centralized reservoirs, while maintaining the constant checking flood,reservoir hennessy capacity for such restoration and expansion engineering measures for the reconstruction of the weir practical way.