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Hole-weir combined type ecological fishway transition section and design method thereof

A transitional and combined technology, applied in barrage/weirs, water conservancy projects, sea area projects, etc., can solve problems such as large water head drop, poor fish upward tracking effect, fast water flow rate, etc., to improve the flow state and maintain the ecology , The effect of water landscape enhancement

Active Publication Date: 2020-07-14
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in recent years, the construction of large-scale hydropower projects must consider the layout of engineering fishways or ecological fishways; The upward tracing effect is poor, and there are shortcomings such as too large water head drop and too fast water flow

Method used

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  • Hole-weir combined type ecological fishway transition section and design method thereof
  • Hole-weir combined type ecological fishway transition section and design method thereof
  • Hole-weir combined type ecological fishway transition section and design method thereof

Examples

Experimental program
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Embodiment Construction

[0041] It should be noted, Figure 1-14 The medium size unit is mm.

[0042] Such as Figure 1-14 As shown in the figure, a transition section of an ecological fishway combined with holes and weirs is set between the ecological fishway and the engineering fishway that require a smooth connection of water depth; the transition section is a trapezoidal edge with decreasing water depth, increasing top width, and decreasing bottom width Sloping open channel, multi-level submerged weirs with holes are set along the transition section. The transition section along the course is the direction from upstream to downstream of the transition section. The submerged weir is a reinforced concrete structure; the width of the groove top of the upstream submerged weir is at least The width of the groove top of the downstream submerged weir gradually increases, the width of the groove bottom of the upstream submerged weir gradually decreases to the width of the groove bottom of the downstream ...

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Abstract

The invention discloses a hole-weir combined type ecological fishway transition section and a design method thereof. The transition section is a trapezoidal side slope open channel with decreasing water depth, increasing top width and decreasing bottom width, and multi-level submerged weirs are disposed along the transition section; the top width of the submerged weirs gradually increases from upstream to downstream, and the bottom width of the submerged weirs gradually decreases from upstream to downstream; the height of the submerged weirs decreases stepwise from upstream to downstream of the transition section; and fish pass holes are disposed on the bottom of the submerged weirs. The transition section utilizes the characteristic of different overflowing of an overflow weir and an orifice, the hole-weir combined type ecological fishway transition section is innovatively designed, and the purpose of enabling water to flow from the upper part, enabling fishes to swim from the lower part, controlling the flow rate, and maintaining ecological characteristics of a fishway is achieved.

Description

technical field [0001] The invention belongs to the field of ecological hydraulics, and in particular relates to a hole-weir combined ecological fishway transition section and a use method thereof. Background technique [0002] With the construction of more and more water conservancy projects blocking rivers, rivers are blocked, which destroys the upward movement of migratory fish, and at the same time affects the transport of various materials in the river and the supplement of fish resources in the upstream spawning area to the downstream fish resources, which is related to the ecological environment. The philosophy of conservation is very different. Therefore, in recent years, the construction of large-scale hydropower projects must consider the layout of engineering fishways or ecological fishways; The upward tracing effect is poor, and there are shortcomings such as too large water head drop and too fast water flow. Therefore, it is imminent to develop a fishway in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B8/08
CPCE02B8/08Y02A40/60
Inventor 刘明潇孙羽王鹏涛范聪喆孙东坡吴文强张凌峰陈申
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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